diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..39df1a0
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,18 @@
+# Copy to `.env` in the repo root (same directory as Pipfile). `.env` is gitignored.
+
+# Workspace tree: code/ (writable), lib/ (read-only); defaults to ./workspace under the repo root
+# WORKSPACE_ROOT=/home/you/projects/python-editor/workspace
+
+# If set, `/api/*` accepts this Bearer token (and still accepts session cookies if AUTH_ENABLED=true)
+# EDITOR_API_KEY=
+
+# --- User accounts (SQLite) ---
+# AUTH_ENABLED=true          # require sign-in for /api/* (except /api/auth/*)
+# AUTH_REGISTER_OPEN=true    # allow POST /api/auth/register
+# AUTH_DATABASE_PATH=./data/editor.db
+# AUTH_SESSION_DAYS=14
+# BOOTSTRAP_ADMIN_USERNAME=admin   # first-run only: create superuser if DB has zero users
+# BOOTSTRAP_ADMIN_PASSWORD=change-me-in-production
+
+# Base URL for `pipenv run test-selenium` (app must be running separately)
+# SELENIUM_BASE_URL=http://127.0.0.1:8080
diff --git a/.gitignore b/.gitignore
index 36b13f1..7c867f9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,8 +15,8 @@ dist/
 downloads/
 eggs/
 .eggs/
-lib/
-lib64/
+/lib/
+/lib64/
 parts/
 sdist/
 var/
@@ -128,6 +128,9 @@ celerybeat.pid
 # SageMath parsed files
 *.sage.py
 
+# Local auth database (default path)
+/data/
+
 # Environments
 .env
 .venv
diff --git a/Pipfile b/Pipfile
new file mode 100644
index 0000000..48f870d
--- /dev/null
+++ b/Pipfile
@@ -0,0 +1,25 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[dev-packages]
+pytest = "*"
+pytest-cov = "*"
+httpx = "*"
+selenium = "*"
+
+[packages]
+fastapi = "*"
+uvicorn = "*"
+sqlalchemy = "*"
+bcrypt = "*"
+
+[requires]
+python_version = "3.12"
+
+[scripts]
+dev = "uvicorn app:app --app-dir src --reload --port 8080"
+test = "bash -lc 'cd src && PYTHONPATH=. pytest ../tests'"
+test-integration = "bash -lc 'cd src && PYTHONPATH=. pytest ../tests -m integration'"
+test-selenium = "bash -lc 'cd src && PYTHONPATH=. pytest ../tests -m selenium -v'"
diff --git a/Pipfile.lock b/Pipfile.lock
new file mode 100644
index 0000000..f7c0140
--- /dev/null
+++ b/Pipfile.lock
@@ -0,0 +1,764 @@
+{
+    "_meta": {
+        "hash": {
+            "sha256": "f9de958b9982b3a30c107c2c02746aece031522dc429be84e4f9589c73404282"
+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.12"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "annotated-doc": {
+            "hashes": [
+                "sha256:571ac1dc6991c450b25a9c2d84a3705e2ae7a53467b5d111c24fa8baabbed320",
+                "sha256:fbcda96e87e9c92ad167c2e53839e57503ecfda18804ea28102353485033faa4"
+            ],
+            "markers": "python_version >= '3.8'",
+            "version": "==0.0.4"
+        },
+        "annotated-types": {
+            "hashes": [
+                "sha256:1f02e8b43a8fbbc3f3e0d4f0f4bfc8131bcb4eebe8849b8e5c773f3a1c582a53",
+                "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89"
+            ],
+            "markers": "python_version >= '3.8'",
+            "version": "==0.7.0"
+        },
+        "anyio": {
+            "hashes": [
+                "sha256:08b310f9e24a9594186fd75b4f73f4a4152069e3853f1ed8bfbf58369f4ad708",
+                "sha256:334b70e641fd2221c1505b3890c69882fe4a2df910cba14d97019b90b24439dc"
+            ],
+            "markers": "python_version >= '3.10'",
+            "version": "==4.13.0"
+        },
+        "bcrypt": {
+            "hashes": [
+                "sha256:046ad6db88edb3c5ece4369af997938fb1c19d6a699b9c1b27b0db432faae4c4",
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+                "sha256:0c8e093ea2532601a6f686edbc2c6b2ec24131ff5c52f7610dd64fa4553b5464",
+                "sha256:0cae4cb350934dfd74c020525eeae0a5f79257e8a201c0c176f4b84fdbf2a4b4",
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+                "sha256:212139484ab3207b1f0c00633d3be92fef3c5f0af17cad155679d03ff2ee1e41",
+                "sha256:2b732e7d388fa22d48920baa267ba5d97cca38070b69c0e2d37087b381c681fd",
+                "sha256:35a77ec55b541e5e583eb3436ffbbf53b0ffa1fa16ca6782279daf95d146dcd9",
+                "sha256:38cac74101777a6a7d3b3e3cfefa57089b5ada650dce2baf0cbdd9d65db22a9e",
+                "sha256:3abeb543874b2c0524ff40c57a4e14e5d3a66ff33fb423529c88f180fd756538",
+                "sha256:3ca8a166b1140436e058298a34d88032ab62f15aae1c598580333dc21d27ef10",
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+                "sha256:4870a52610537037adb382444fefd3706d96d663ac44cbb2f37e3919dca3d7ef",
+                "sha256:48f753100931605686f74e27a7b49238122aa761a9aefe9373265b8b7aa43ea4",
+                "sha256:4bfd2a34de661f34d0bda43c3e4e79df586e4716ef401fe31ea39d69d581ef23",
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+                "sha256:f6984a24db30548fd39a44360532898c33528b74aedf81c26cf29c51ee47057e",
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+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.8'",
+            "version": "==5.0.0"
+        },
+        "click": {
+            "hashes": [
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+        "fastapi": {
+            "hashes": [
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+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.10'",
+            "version": "==0.136.1"
+        },
+        "greenlet": {
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+                "sha256:e5ddf316ced87539144621453c3aef229575825fe60c604e62bedc4003f372b2",
+                "sha256:f35807464c4c58c55f0d31dfa83c541a5615d825c2fe3d2b95360cf7c4e3c0a8",
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+            "markers": "platform_machine == 'aarch64' or (platform_machine == 'ppc64le' or (platform_machine == 'x86_64' or (platform_machine == 'amd64' or (platform_machine == 'AMD64' or (platform_machine == 'win32' or platform_machine == 'WIN32')))))",
+            "version": "==3.5.0"
+        },
+        "h11": {
+            "hashes": [
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+                "sha256:ff452ff5a3e828ce110190feff1178bb1f2ea2281fa2075aadb987c2fb221661"
+            ],
+            "markers": "python_version >= '3.8'",
+            "version": "==26.2"
+        },
+        "pluggy": {
+            "hashes": [
+                "sha256:7dcc130b76258d33b90f61b658791dede3486c3e6bfb003ee5c9bfb396dd22f3",
+                "sha256:e920276dd6813095e9377c0bc5566d94c932c33b27a3e3945d8389c374dd4746"
+            ],
+            "markers": "python_version >= '3.9'",
+            "version": "==1.6.0"
+        },
+        "pygments": {
+            "hashes": [
+                "sha256:6757cd03768053ff99f3039c1a36d6c0aa0b263438fcab17520b30a303a82b5f",
+                "sha256:81a9e26dd42fd28a23a2d169d86d7ac03b46e2f8b59ed4698fb4785f946d0176"
+            ],
+            "markers": "python_version >= '3.9'",
+            "version": "==2.20.0"
+        },
+        "pysocks": {
+            "hashes": [
+                "sha256:08e69f092cc6dbe92a0fdd16eeb9b9ffbc13cadfe5ca4c7bd92ffb078b293299",
+                "sha256:2725bd0a9925919b9b51739eea5f9e2bae91e83288108a9ad338b2e3a4435ee5",
+                "sha256:3f8804571ebe159c380ac6de37643bb4685970655d3bba243530d6558b799aa0"
+            ],
+            "version": "==1.7.1"
+        },
+        "pytest": {
+            "hashes": [
+                "sha256:2c5efc453d45394fdd706ade797c0a81091eccd1d6e4bccfcd476e2b8e0ab5d9",
+                "sha256:b86ada508af81d19edeb213c681b1d48246c1a91d304c6c81a427674c17eb91c"
+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.10'",
+            "version": "==9.0.3"
+        },
+        "pytest-cov": {
+            "hashes": [
+                "sha256:30674f2b5f6351aa09702a9c8c364f6a01c27aae0c1366ae8016160d1efc56b2",
+                "sha256:a0461110b7865f9a271aa1b51e516c9a95de9d696734a2f71e3e78f46e1d4678"
+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.9'",
+            "version": "==7.1.0"
+        },
+        "selenium": {
+            "hashes": [
+                "sha256:4f97639055dcfa9eadf8ccf549ba7b0e49c655d4e2bde19b9a44e916b754e769",
+                "sha256:bada5c08a989f812728a4b5bea884d8e91894e939a441cc3a025201ce718581e"
+            ],
+            "index": "pypi",
+            "markers": "python_version >= '3.10'",
+            "version": "==4.43.0"
+        },
+        "sniffio": {
+            "hashes": [
+                "sha256:2f6da418d1f1e0fddd844478f41680e794e6051915791a034ff65e5f100525a2",
+                "sha256:f4324edc670a0f49750a81b895f35c3adb843cca46f0530f79fc1babb23789dc"
+            ],
+            "markers": "python_version >= '3.7'",
+            "version": "==1.3.1"
+        },
+        "sortedcontainers": {
+            "hashes": [
+                "sha256:25caa5a06cc30b6b83d11423433f65d1f9d76c4c6a0c90e3379eaa43b9bfdb88",
+                "sha256:a163dcaede0f1c021485e957a39245190e74249897e2ae4b2aa38595db237ee0"
+            ],
+            "version": "==2.4.0"
+        },
+        "trio": {
+            "hashes": [
+                "sha256:3bd5d87f781d9b0192d592aef28691f8951d6c2e41b7e1da4c25cde6c180ae9b",
+                "sha256:a29b92b73f09d4b48ed249acd91073281a7f1063f09caba5dc70465b5c7aa970"
+            ],
+            "markers": "python_version >= '3.10'",
+            "version": "==0.33.0"
+        },
+        "trio-websocket": {
+            "hashes": [
+                "sha256:22c72c436f3d1e264d0910a3951934798dcc5b00ae56fc4ee079d46c7cf20fae",
+                "sha256:df605665f1db533f4a386c94525870851096a223adcb97f72a07e8b4beba45b6"
+            ],
+            "markers": "python_version >= '3.8'",
+            "version": "==0.12.2"
+        },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:0cea48d173cc12fa28ecabc3b837ea3cf6f38c6d1136f85cbaaf598984861466",
+                "sha256:f0fa19c6845758ab08074a0cfa8b7aecb71c999ca73d62883bc25cc018c4e548"
+            ],
+            "markers": "python_version >= '3.9'",
+            "version": "==4.15.0"
+        },
+        "urllib3": {
+            "extras": [
+                "socks"
+            ],
+            "hashes": [
+                "sha256:1b62b6884944a57dbe321509ab94fd4d3b307075e0c2eae991ac71ee15ad38ed",
+                "sha256:bf272323e553dfb2e87d9bfd225ca7b0f467b919d7bbd355436d3fd37cb0acd4"
+            ],
+            "markers": "python_version >= '3.9'",
+            "version": "==2.6.3"
+        },
+        "websocket-client": {
+            "hashes": [
+                "sha256:9e813624b6eb619999a97dc7958469217c3176312b3a16a4bd1bc7e08a46ec98",
+                "sha256:af248a825037ef591efbf6ed20cc5faa03d3b47b9e5a2230a529eeee1c1fc3ef"
+            ],
+            "markers": "python_version >= '3.9'",
+            "version": "==1.9.0"
+        },
+        "wsproto": {
+            "hashes": [
+                "sha256:61eea322cdf56e8cc904bd3ad7573359a242ba65688716b0710a5eb12beab584",
+                "sha256:b86885dcf294e15204919950f666e06ffc6c7c114ca900b060d6e16293528294"
+            ],
+            "markers": "python_version >= '3.10'",
+            "version": "==1.3.2"
+        }
+    }
+}
diff --git a/README.md b/README.md
index 44b5512..ed483b7 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,60 @@
 # python-editor
 
+Browser-based Python editing: **FastAPI** serves static assets, stores workspace files, and optional **API key auth**. **Pyodide** runs your scripts and **Jedi** (inside Pyodide) powers completions — no server-side Python execution or Jedi.
+
+## Run
+
+```bash
+cp .env.example .env   # optional: set WORKSPACE_ROOT, EDITOR_API_KEY, etc.
+pipenv install
+pipenv run dev
+```
+
+Configuration is read from **`.env`** at the repo root (see `.env.example`). Values there are applied when the app loads unless the variable is already set in your shell. [Pipenv](https://pipenv.pypa.io/) also loads `.env` for `pipenv run` commands.
+
+Tests (includes **pytest** and **selenium** in dev dependencies):
+
+```bash
+pipenv run test
+pipenv run test-integration   # Playwright; optional
+```
+
+### Selenium
+
+Selenium talks to a **real browser** against a **running server** (not the in-process `TestClient`).
+
+1. Install **Google Chrome** or Chromium on the machine (Selenium 4 uses [Selenium Manager](https://www.selenium.dev/documentation/selenium_manager/) to resolve a matching driver).
+2. In one terminal, start the app (default `http://127.0.0.1:8080`):
+
+   ```bash
+   pipenv run dev
+   ```
+
+3. In another terminal:
+
+   ```bash
+   pipenv run test-selenium
+   ```
+
+   If the app listens elsewhere, set **`SELENIUM_BASE_URL`** (e.g. `http://127.0.0.1:9000`) before running.
+
+   Or run only Selenium-marked tests:
+
+   ```bash
+   cd src && PYTHONPATH=. pipenv run pytest ../tests -m selenium -v
+   ```
+
+If nothing is listening, the smoke test **skips** with a short message instead of failing.
+
+Open [http://localhost:8080](http://localhost:8080).
+
+**User accounts** — Set `AUTH_ENABLED=true` in `.env` to require sign-in for workspace APIs. Users live in a SQLite file (`AUTH_DATABASE_PATH`, default `./data/editor.db`). Use `/register` (if `AUTH_REGISTER_OPEN=true`) or `BOOTSTRAP_ADMIN_USERNAME` / `BOOTSTRAP_ADMIN_PASSWORD` for the first superuser. Superusers can **GET/POST/DELETE `/api/users`** to list, create, or remove accounts.
+
+**API key** — If `EDITOR_API_KEY` is set, requests may use `Authorization: Bearer …` instead of a session (useful for automation). When `AUTH_ENABLED=true`, a valid session *or* API key is accepted.
+
+The home page can store the API key in `sessionStorage` when you are not using cookie login, or use `?api_key=` on `/editor`.
+
+## Layout
+
+- `src/` — FastAPI app and static UI (`src/static/`)
+- `workspace/` — default tree: `code/` (editable), `lib/` (read-only via API)
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..1153c2c
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,4 @@
+[pytest]
+markers =
+    integration: browser / network integration tests
+    selenium: Selenium UI tests (need running server; see README)
diff --git a/src/app.py b/src/app.py
new file mode 100644
index 0000000..7c2cf2c
--- /dev/null
+++ b/src/app.py
@@ -0,0 +1,7 @@
+from editor_app.main import app
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import uvicorn
+
+    uvicorn.run(app, host="0.0.0.0", port=8080)
diff --git a/src/editor_app/__init__.py b/src/editor_app/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/editor_app/config.py b/src/editor_app/config.py
new file mode 100644
index 0000000..0d8b7b2
--- /dev/null
+++ b/src/editor_app/config.py
@@ -0,0 +1,30 @@
+import os
+from pathlib import Path
+
+
+# Application package lives under `src/`; repo root is one level up (for `.env`, default workspace).
+BASE_DIR = Path(__file__).resolve().parent.parent
+PROJECT_ROOT = BASE_DIR.parent
+STATIC_DIR = BASE_DIR / "static"
+
+
+def load_env_file(env_path: Path) -> None:
+    """Load KEY=VALUE entries from a local .env file (does not override existing os.environ)."""
+    if not env_path.exists():
+        return
+
+    for line in env_path.read_text(encoding="utf-8").splitlines():
+        stripped = line.strip()
+        if not stripped or stripped.startswith("#") or "=" not in stripped:
+            continue
+        key, value = stripped.split("=", 1)
+        key = key.strip()
+        value = value.strip().strip('"').strip("'")
+        if key and key not in os.environ:
+            os.environ[key] = value
+
+
+load_env_file(PROJECT_ROOT / ".env")
+
+_default_workspace = PROJECT_ROOT / "workspace"
+WORKSPACE_ROOT = Path(os.environ.get("WORKSPACE_ROOT", str(_default_workspace))).resolve()
diff --git a/src/editor_app/db/__init__.py b/src/editor_app/db/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/editor_app/db/models.py b/src/editor_app/db/models.py
new file mode 100644
index 0000000..11c4404
--- /dev/null
+++ b/src/editor_app/db/models.py
@@ -0,0 +1,40 @@
+from __future__ import annotations
+
+import datetime as dt
+
+from sqlalchemy import Boolean, DateTime, ForeignKey, Integer, String
+from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
+
+
+def _utc_naive() -> dt.datetime:
+    return dt.datetime.now(dt.UTC).replace(tzinfo=None)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+class User(Base):
+    __tablename__ = "users"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    username: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    password_hash: Mapped[str] = mapped_column(String(256))
+    is_superuser: Mapped[bool] = mapped_column(Boolean, default=False)
+    created_at: Mapped[dt.datetime] = mapped_column(DateTime, default=_utc_naive)
+
+    sessions: Mapped[list[AuthSession]] = relationship(
+        "AuthSession", back_populates="user", cascade="all, delete-orphan"
+    )
+
+
+class AuthSession(Base):
+    __tablename__ = "auth_sessions"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), index=True)
+    token: Mapped[str] = mapped_column(String(128), unique=True, index=True)
+    expires_at: Mapped[dt.datetime] = mapped_column(DateTime)
+    created_at: Mapped[dt.datetime] = mapped_column(DateTime, default=_utc_naive)
+
+    user: Mapped[User] = relationship("User", back_populates="sessions")
diff --git a/src/editor_app/db/session.py b/src/editor_app/db/session.py
new file mode 100644
index 0000000..f8bf006
--- /dev/null
+++ b/src/editor_app/db/session.py
@@ -0,0 +1,55 @@
+from __future__ import annotations
+
+import os
+from collections.abc import Generator
+from pathlib import Path
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session, sessionmaker
+
+from editor_app.config import PROJECT_ROOT
+
+_engine = None
+_SessionLocal: sessionmaker[Session] | None = None
+
+
+def _database_url() -> str:
+    path = os.environ.get("AUTH_DATABASE_PATH", str(PROJECT_ROOT / "data" / "editor.db"))
+    Path(path).parent.mkdir(parents=True, exist_ok=True)
+    return f"sqlite:///{path}"
+
+
+def reset_engine() -> None:
+    """Test helper: clear cached engine after env change."""
+    global _engine, _SessionLocal
+    if _engine is not None:
+        _engine.dispose()
+    _engine = None
+    _SessionLocal = None
+
+
+def get_engine():
+    global _engine, _SessionLocal
+    if _engine is None:
+        _engine = create_engine(
+            _database_url(),
+            connect_args={"check_same_thread": False},
+            pool_pre_ping=True,
+        )
+        _SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=_engine)
+    return _engine
+
+
+def get_session_factory() -> sessionmaker[Session]:
+    get_engine()
+    assert _SessionLocal is not None
+    return _SessionLocal
+
+
+def get_db() -> Generator[Session, None, None]:
+    factory = get_session_factory()
+    db = factory()
+    try:
+        yield db
+    finally:
+        db.close()
diff --git a/src/editor_app/deps.py b/src/editor_app/deps.py
new file mode 100644
index 0000000..fd3f982
--- /dev/null
+++ b/src/editor_app/deps.py
@@ -0,0 +1,63 @@
+from __future__ import annotations
+
+import os
+
+from fastapi import Cookie, Depends, Header, HTTPException
+from sqlalchemy.orm import Session
+
+from editor_app.db.session import get_db
+from editor_app.db.models import User
+from editor_app.services import accounts
+
+
+def api_key_valid(authorization: str | None) -> bool:
+    expected = (os.environ.get("EDITOR_API_KEY") or "").strip()
+    if not expected:
+        return False
+    return (authorization or "").strip() == f"Bearer {expected}"
+
+
+async def require_api_access(
+    db: Session = Depends(get_db),
+    authorization: str | None = Header(None),
+    editor_session: str | None = Cookie(None),
+) -> None:
+    """API key, or (when auth off) open access, or (when auth on) valid session — see README."""
+    if api_key_valid(authorization):
+        return
+    key_configured = bool((os.environ.get("EDITOR_API_KEY") or "").strip())
+    if key_configured:
+        if accounts.auth_enabled():
+            user = accounts.get_session_user(db, editor_session)
+            if user:
+                return
+        raise HTTPException(status_code=401, detail="Invalid or missing API key")
+    if not accounts.auth_enabled():
+        return
+    user = accounts.get_session_user(db, editor_session)
+    if user is None:
+        raise HTTPException(status_code=401, detail="Not authenticated")
+
+
+async def get_current_user_optional(
+    db: Session = Depends(get_db),
+    authorization: str | None = Header(None),
+    editor_session: str | None = Cookie(None),
+) -> User | None:
+    if api_key_valid(authorization):
+        return None
+    if not accounts.auth_enabled():
+        return None
+    return accounts.get_session_user(db, editor_session)
+
+
+async def require_superuser(
+    user: User | None = Depends(get_current_user_optional),
+) -> User:
+    if not accounts.auth_enabled():
+        raise HTTPException(status_code=400, detail="User management requires AUTH_ENABLED=true")
+    if user is None:
+        raise HTTPException(status_code=401, detail="Not authenticated")
+    if not user.is_superuser:
+        raise HTTPException(status_code=403, detail="Superuser required")
+    return user
diff --git a/src/editor_app/main.py b/src/editor_app/main.py
new file mode 100644
index 0000000..c9c646f
--- /dev/null
+++ b/src/editor_app/main.py
@@ -0,0 +1,47 @@
+import os
+from contextlib import asynccontextmanager
+
+from fastapi import Depends, FastAPI
+from fastapi.staticfiles import StaticFiles
+from sqlalchemy.orm import sessionmaker
+
+from editor_app.config import STATIC_DIR, WORKSPACE_ROOT
+from editor_app.db.models import Base
+from editor_app.db.session import get_engine
+from editor_app.deps import require_api_access
+from editor_app.routers.auth_routes import router as auth_router
+from editor_app.routers.files import router as files_router
+from editor_app.routers.frontend import router as frontend_router
+from editor_app.routers.users_admin import router as users_admin_router
+from editor_app.services import accounts
+
+
+@asynccontextmanager
+async def lifespan(_app: FastAPI):
+    (WORKSPACE_ROOT / "lib").mkdir(parents=True, exist_ok=True)
+    engine = get_engine()
+    Base.metadata.create_all(bind=engine)
+    factory = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+    db = factory()
+    try:
+        if accounts.auth_enabled():
+            bu = os.environ.get("BOOTSTRAP_ADMIN_USERNAME", "").strip()
+            bp = os.environ.get("BOOTSTRAP_ADMIN_PASSWORD", "").strip()
+            if bu and bp and accounts.count_users(db) == 0:
+                accounts.create_user(db, bu, bp, is_superuser=True)
+    finally:
+        db.close()
+    yield
+
+
+def create_app() -> FastAPI:
+    app = FastAPI(lifespan=lifespan)
+    app.mount("/static", StaticFiles(directory=str(STATIC_DIR)), name="static")
+    app.include_router(frontend_router)
+    app.include_router(auth_router)
+    app.include_router(users_admin_router)
+    app.include_router(files_router, dependencies=[Depends(require_api_access)])
+    return app
+
+
+app = create_app()
diff --git a/src/editor_app/models.py b/src/editor_app/models.py
new file mode 100644
index 0000000..f1928a2
--- /dev/null
+++ b/src/editor_app/models.py
@@ -0,0 +1,22 @@
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class FileContent(BaseModel):
+    content: str
+
+
+class FileInfo(BaseModel):
+    name: str
+    is_directory: bool
+    size: Optional[int] = None
+
+
+class FolderOperation(BaseModel):
+    path: str
+
+
+class MoveFileRequest(BaseModel):
+    source_path: str
+    destination_folder: str = ""
diff --git a/src/editor_app/routers/__init__.py b/src/editor_app/routers/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/editor_app/routers/auth_routes.py b/src/editor_app/routers/auth_routes.py
new file mode 100644
index 0000000..86da76c
--- /dev/null
+++ b/src/editor_app/routers/auth_routes.py
@@ -0,0 +1,95 @@
+from __future__ import annotations
+
+import os
+
+from fastapi import APIRouter, Depends, HTTPException, Request, Response
+from sqlalchemy.orm import Session
+
+from editor_app.db.session import get_db
+from editor_app.schemas.users import AuthStatusResponse, LoginRequest, RegisterRequest, UserPublic
+from editor_app.services import accounts
+
+router = APIRouter(prefix="/api/auth", tags=["auth"])
+
+
+def _set_session_cookie(response: Response, request: Request, token: str) -> None:
+    max_age = accounts.session_ttl_days() * 86400
+    secure = request.url.scheme == "https"
+    response.set_cookie(
+        key=accounts.SESSION_COOKIE_NAME,
+        value=token,
+        max_age=max_age,
+        httponly=True,
+        samesite="lax",
+        secure=secure,
+        path="/",
+    )
+
+
+def _clear_session_cookie(response: Response, request: Request) -> None:
+    secure = request.url.scheme == "https"
+    response.delete_cookie(accounts.SESSION_COOKIE_NAME, path="/", samesite="lax", secure=secure)
+
+
+@router.get("/status", response_model=AuthStatusResponse)
+async def auth_status() -> AuthStatusResponse:
+    return AuthStatusResponse(auth_enabled=accounts.auth_enabled(), register_open=accounts.register_open())
+
+
+@router.get("/me")
+async def auth_me(
+    request: Request,
+    db: Session = Depends(get_db),
+) -> dict:
+    if not accounts.auth_enabled():
+        return {"auth_enabled": False, "user": None}
+    token = request.cookies.get(accounts.SESSION_COOKIE_NAME)
+    user = accounts.get_session_user(db, token)
+    if user is None:
+        raise HTTPException(status_code=401, detail="Not authenticated")
+    return {"auth_enabled": True, "user": UserPublic.model_validate(user).model_dump()}
+
+
+@router.post("/register", response_model=UserPublic)
+async def register(
+    body: RegisterRequest,
+    db: Session = Depends(get_db),
+) -> UserPublic:
+    if not accounts.auth_enabled():
+        raise HTTPException(status_code=400, detail="Set AUTH_ENABLED=true to use accounts")
+    if not accounts.register_open():
+        raise HTTPException(status_code=403, detail="Registration is disabled (AUTH_REGISTER_OPEN=false)")
+    try:
+        user = accounts.register_user(db, body.username, body.password)
+    except ValueError as exc:
+        raise HTTPException(status_code=409, detail=str(exc)) from exc
+    return UserPublic.model_validate(user)
+
+
+@router.post("/login")
+async def login(
+    request: Request,
+    response: Response,
+    body: LoginRequest,
+    db: Session = Depends(get_db),
+) -> UserPublic:
+    if not accounts.auth_enabled():
+        raise HTTPException(status_code=400, detail="Set AUTH_ENABLED=true to use accounts")
+    user = accounts.authenticate(db, body.username, body.password)
+    if not user:
+        raise HTTPException(status_code=401, detail="Invalid username or password")
+    sess = accounts.create_session(db, user)
+    _set_session_cookie(response, request, sess.token)
+    return UserPublic.model_validate(user)
+
+
+@router.post("/logout")
+async def logout(
+    request: Request,
+    response: Response,
+    db: Session = Depends(get_db),
+) -> dict:
+    token = request.cookies.get(accounts.SESSION_COOKIE_NAME)
+    accounts.delete_session(db, token)
+    _clear_session_cookie(response, request)
+    return {"message": "Logged out"}
diff --git a/src/editor_app/routers/files.py b/src/editor_app/routers/files.py
new file mode 100644
index 0000000..aa5e48b
--- /dev/null
+++ b/src/editor_app/routers/files.py
@@ -0,0 +1,56 @@
+from fastapi import APIRouter
+
+from editor_app.models import FileContent, FolderOperation, MoveFileRequest
+from editor_app.services import filesystem
+
+router = APIRouter(prefix="/api")
+
+
+@router.get("/files")
+async def list_files(path: str = ""):
+    files = filesystem.list_files(path)
+    return {"files": files}
+
+
+@router.get("/workspace/py-sources")
+async def workspace_python_sources():
+    return {"files": filesystem.collect_python_sources()}
+
+
+@router.get("/file/{file_path:path}")
+async def read_file(file_path: str):
+    content, filename = filesystem.read_text_file(file_path)
+    return {"content": content, "filename": filename}
+
+
+@router.post("/file/{file_path:path}")
+async def save_file(file_path: str, file_data: FileContent):
+    filename = filesystem.save_text_file(file_path, file_data.content)
+    return {"message": "File saved successfully", "filename": filename}
+
+
+@router.post("/file-move")
+async def move_file(move_data: MoveFileRequest):
+    new_path, moved_type = filesystem.move_path(
+        source_path=move_data.source_path,
+        destination_folder=move_data.destination_folder,
+    )
+    return {"message": "Path moved successfully", "new_path": new_path, "moved_type": moved_type}
+
+
+@router.delete("/file/{file_path:path}")
+async def delete_file(file_path: str):
+    filesystem.delete_file(file_path)
+    return {"message": "File deleted successfully"}
+
+
+@router.post("/folder/new/{folder_path:path}")
+async def create_folder(folder_path: str, folder_data: FolderOperation):
+    folder_name = filesystem.create_folder(folder_path)
+    return {"message": "Folder created successfully", "folder": folder_name}
+
+
+@router.delete("/folder/{folder_path:path}")
+async def delete_folder(folder_path: str):
+    filesystem.delete_folder(folder_path)
+    return {"message": "Folder deleted successfully"}
diff --git a/src/editor_app/routers/frontend.py b/src/editor_app/routers/frontend.py
new file mode 100644
index 0000000..ec8cfe7
--- /dev/null
+++ b/src/editor_app/routers/frontend.py
@@ -0,0 +1,26 @@
+from fastapi import APIRouter
+from fastapi.responses import FileResponse
+
+from editor_app.config import STATIC_DIR
+
+router = APIRouter()
+
+
+@router.get("/")
+async def serve_home():
+    return FileResponse(STATIC_DIR / "home.html")
+
+
+@router.get("/editor")
+async def serve_frontend():
+    return FileResponse(STATIC_DIR / "index.html")
+
+
+@router.get("/login")
+async def serve_login():
+    return FileResponse(STATIC_DIR / "login.html")
+
+
+@router.get("/register")
+async def serve_register():
+    return FileResponse(STATIC_DIR / "register.html")
diff --git a/src/editor_app/routers/users_admin.py b/src/editor_app/routers/users_admin.py
new file mode 100644
index 0000000..3bc04d5
--- /dev/null
+++ b/src/editor_app/routers/users_admin.py
@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+
+from editor_app.db.session import get_db
+from editor_app.db.models import User
+from editor_app.deps import require_superuser
+from editor_app.schemas.users import UserCreateAdmin, UserPublic
+from editor_app.services import accounts
+
+router = APIRouter(prefix="/api/users", tags=["users"])
+
+
+@router.get("", response_model=list[UserPublic])
+async def list_users(
+    _admin: User = Depends(require_superuser),
+    db: Session = Depends(get_db),
+) -> list[UserPublic]:
+    return [UserPublic.model_validate(u) for u in accounts.list_users(db)]
+
+
+@router.post("", response_model=UserPublic)
+async def create_user_admin(
+    body: UserCreateAdmin,
+    admin: User = Depends(require_superuser),
+    db: Session = Depends(get_db),
+) -> UserPublic:
+    if accounts.get_user_by_username(db, body.username):
+        raise HTTPException(status_code=409, detail="Username already taken")
+    user = accounts.create_user(
+        db,
+        body.username,
+        body.password,
+        is_superuser=body.is_superuser,
+    )
+    return UserPublic.model_validate(user)
+
+
+@router.delete("/{user_id}")
+async def delete_user_admin(
+    user_id: int,
+    admin: User = Depends(require_superuser),
+    db: Session = Depends(get_db),
+) -> dict:
+    if user_id == admin.id:
+        raise HTTPException(status_code=400, detail="Cannot delete your own account")
+    if not accounts.delete_user(db, user_id):
+        raise HTTPException(status_code=404, detail="User not found")
+    return {"message": "User deleted"}
diff --git a/src/editor_app/schemas/users.py b/src/editor_app/schemas/users.py
new file mode 100644
index 0000000..5e32016
--- /dev/null
+++ b/src/editor_app/schemas/users.py
@@ -0,0 +1,46 @@
+from pydantic import BaseModel, Field, field_validator
+
+
+class RegisterRequest(BaseModel):
+    username: str = Field(min_length=3, max_length=64)
+    password: str = Field(min_length=8, max_length=128)
+
+    @field_validator("username")
+    @classmethod
+    def username_chars(cls, v: str) -> str:
+        s = v.strip()
+        if not s.replace("_", "").isalnum():
+            raise ValueError("Username may only contain letters, numbers, and underscores")
+        return s
+
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+
+class UserPublic(BaseModel):
+    id: int
+    username: str
+    is_superuser: bool
+
+    model_config = {"from_attributes": True}
+
+
+class UserCreateAdmin(BaseModel):
+    username: str = Field(min_length=3, max_length=64)
+    password: str = Field(min_length=8, max_length=128)
+    is_superuser: bool = False
+
+    @field_validator("username")
+    @classmethod
+    def username_chars(cls, v: str) -> str:
+        s = v.strip()
+        if not s.replace("_", "").isalnum():
+            raise ValueError("Username may only contain letters, numbers, and underscores")
+        return s
+
+
+class AuthStatusResponse(BaseModel):
+    auth_enabled: bool
+    register_open: bool
diff --git a/src/editor_app/services/__init__.py b/src/editor_app/services/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/editor_app/services/accounts.py b/src/editor_app/services/accounts.py
new file mode 100644
index 0000000..33125aa
--- /dev/null
+++ b/src/editor_app/services/accounts.py
@@ -0,0 +1,128 @@
+from __future__ import annotations
+
+import datetime as dt
+import os
+import secrets
+from typing import TYPE_CHECKING
+
+import bcrypt
+from sqlalchemy import func, select
+from sqlalchemy.orm import Session
+
+from editor_app.db.models import AuthSession, User
+
+if TYPE_CHECKING:
+    pass
+
+SESSION_COOKIE_NAME = "editor_session"
+SESSION_DAYS_DEFAULT = 14
+
+
+def auth_enabled() -> bool:
+    return os.environ.get("AUTH_ENABLED", "false").strip().lower() in ("1", "true", "yes", "on")
+
+
+def register_open() -> bool:
+    return os.environ.get("AUTH_REGISTER_OPEN", "true").strip().lower() in ("1", "true", "yes", "on")
+
+
+def session_ttl_days() -> int:
+    try:
+        return max(1, min(365, int(os.environ.get("AUTH_SESSION_DAYS", str(SESSION_DAYS_DEFAULT)))))
+    except ValueError:
+        return SESSION_DAYS_DEFAULT
+
+
+def hash_password(password: str) -> str:
+    return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode("ascii")
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    try:
+        return bcrypt.checkpw(plain.encode("utf-8"), hashed.encode("ascii"))
+    except (ValueError, TypeError):
+        return False
+
+
+def get_user_by_username(db: Session, username: str) -> User | None:
+    return db.scalars(select(User).where(User.username == username)).one_or_none()
+
+
+def get_user_by_id(db: Session, user_id: int) -> User | None:
+    return db.scalars(select(User).where(User.id == user_id)).one_or_none()
+
+
+def count_users(db: Session) -> int:
+    return int(db.scalar(select(func.count()).select_from(User)) or 0)
+
+
+def create_user(db: Session, username: str, password: str, *, is_superuser: bool = False) -> User:
+    user = User(
+        username=username,
+        password_hash=hash_password(password),
+        is_superuser=is_superuser,
+    )
+    db.add(user)
+    db.commit()
+    db.refresh(user)
+    return user
+
+
+def register_user(db: Session, username: str, password: str) -> User:
+    if get_user_by_username(db, username):
+        raise ValueError("Username already taken")
+    first = count_users(db) == 0
+    return create_user(db, username, password, is_superuser=first)
+
+
+def authenticate(db: Session, username: str, password: str) -> User | None:
+    user = get_user_by_username(db, username.strip())
+    if not user or not verify_password(password, user.password_hash):
+        return None
+    return user
+
+
+def _utc_naive() -> dt.datetime:
+    return dt.datetime.now(dt.UTC).replace(tzinfo=None)
+
+
+def create_session(db: Session, user: User) -> AuthSession:
+    token = secrets.token_urlsafe(48)
+    expires = _utc_naive() + dt.timedelta(days=session_ttl_days())
+    row = AuthSession(user_id=user.id, token=token, expires_at=expires)
+    db.add(row)
+    db.commit()
+    db.refresh(row)
+    return row
+
+
+def get_session_user(db: Session, token: str | None) -> User | None:
+    if not token:
+        return None
+    now = _utc_naive()
+    row = db.scalars(select(AuthSession).where(AuthSession.token == token)).one_or_none()
+    if not row or row.expires_at < now:
+        return None
+    return get_user_by_id(db, row.user_id)
+
+
+def delete_session(db: Session, token: str | None) -> None:
+    if not token:
+        return
+    row = db.scalars(select(AuthSession).where(AuthSession.token == token)).one_or_none()
+    if row:
+        db.delete(row)
+        db.commit()
+
+
+def list_users(db: Session) -> list[User]:
+    return list(db.scalars(select(User).order_by(User.username)).all())
+
+
+def delete_user(db: Session, user_id: int) -> bool:
+    user = get_user_by_id(db, user_id)
+    if not user:
+        return False
+    db.delete(user)
+    db.commit()
+    return True
diff --git a/src/editor_app/services/filesystem.py b/src/editor_app/services/filesystem.py
new file mode 100644
index 0000000..c3a8da0
--- /dev/null
+++ b/src/editor_app/services/filesystem.py
@@ -0,0 +1,202 @@
+import shutil
+from pathlib import Path
+
+from fastapi import HTTPException
+
+from editor_app import config
+from editor_app.models import FileInfo
+
+LIB_DIR_NAME = "lib"
+WRITABLE_ROOTS = {"code"}
+
+
+def normalize_relative_path(relative_path: str) -> str:
+    cleaned = (relative_path or "").strip().lstrip("/")
+    if not cleaned:
+        return ""
+
+    parts = [segment for segment in cleaned.split("/") if segment]
+    if len(parts) >= 2 and parts[0] == "code":
+        while len(parts) >= 2 and parts[0] == parts[1] == "code":
+            parts.pop(1)
+    return "/".join(parts)
+
+
+def resolve_workspace_path(relative_path: str) -> Path:
+    relative_path = normalize_relative_path(relative_path)
+    target_path = (config.WORKSPACE_ROOT / relative_path).resolve()
+    try:
+        target_path.relative_to(config.WORKSPACE_ROOT.resolve())
+    except ValueError as exc:
+        raise HTTPException(status_code=400, detail="Path escapes workspace") from exc
+    return target_path
+
+
+def _is_path_in_lib(target_path: Path) -> bool:
+    workspace = config.WORKSPACE_ROOT.resolve()
+    lib_root = (workspace / LIB_DIR_NAME).resolve()
+    try:
+        target_path.resolve().relative_to(lib_root)
+        return True
+    except ValueError:
+        return False
+
+
+def _ensure_not_lib_path(target_path: Path) -> None:
+    if _is_path_in_lib(target_path):
+        raise HTTPException(status_code=403, detail="lib is read-only")
+
+
+def _is_writable_path(target_path: Path) -> bool:
+    workspace = config.WORKSPACE_ROOT.resolve()
+    resolved = target_path.resolve()
+    try:
+        relative = resolved.relative_to(workspace)
+    except ValueError:
+        return False
+    if not relative.parts:
+        return False
+    return relative.parts[0] in WRITABLE_ROOTS
+
+
+def _ensure_writable_path(target_path: Path) -> None:
+    if not _is_writable_path(target_path):
+        raise HTTPException(
+            status_code=403,
+            detail="Only code/ is writable (lib is read-only)",
+        )
+
+
+def list_files(path: str = "") -> list[FileInfo]:
+    path = normalize_relative_path(path)
+    target_path = config.WORKSPACE_ROOT / path if path else config.WORKSPACE_ROOT
+    if not target_path.exists() or not target_path.is_dir():
+        raise HTTPException(status_code=404, detail="Directory not found")
+
+    files = []
+    for item in sorted(target_path.iterdir()):
+        if item.name.startswith("."):
+            continue
+        files.append(
+            FileInfo(
+                name=item.name,
+                is_directory=item.is_dir(),
+                size=item.stat().st_size if item.is_file() else None,
+            )
+        )
+    return files
+
+
+def read_text_file(file_path: str) -> tuple[str, str]:
+    target_path = resolve_workspace_path(file_path)
+    if not target_path.exists():
+        raise HTTPException(status_code=404, detail="File not found")
+    if target_path.is_dir():
+        raise HTTPException(status_code=400, detail="Path is a directory")
+    try:
+        content = target_path.read_text(encoding="utf-8")
+    except UnicodeDecodeError as exc:
+        raise HTTPException(status_code=400, detail="File is not a text file") from exc
+    return content, target_path.name
+
+
+def save_text_file(file_path: str, content: str) -> str:
+    target_path = resolve_workspace_path(file_path)
+    _ensure_not_lib_path(target_path)
+    _ensure_writable_path(target_path)
+    target_path.parent.mkdir(parents=True, exist_ok=True)
+    target_path.write_text(content, encoding="utf-8")
+    return target_path.name
+
+
+def delete_file(file_path: str) -> None:
+    target_path = resolve_workspace_path(file_path)
+    _ensure_not_lib_path(target_path)
+    _ensure_writable_path(target_path)
+    if not target_path.exists():
+        raise HTTPException(status_code=404, detail="File not found")
+    if target_path.is_dir():
+        raise HTTPException(status_code=400, detail="Cannot delete directories")
+    target_path.unlink()
+
+
+def move_path(source_path: str, destination_folder: str) -> tuple[str, str]:
+    source = resolve_workspace_path(source_path)
+    _ensure_not_lib_path(source)
+    _ensure_writable_path(source)
+    if not source.exists():
+        raise HTTPException(status_code=404, detail="Source path not found")
+
+    destination_dir = (
+        resolve_workspace_path(destination_folder)
+        if destination_folder
+        else config.WORKSPACE_ROOT
+    )
+    _ensure_not_lib_path(destination_dir)
+    _ensure_writable_path(destination_dir)
+    if not destination_dir.exists() or not destination_dir.is_dir():
+        raise HTTPException(status_code=404, detail="Destination folder not found")
+
+    destination = destination_dir / source.name
+    source_resolved = source.resolve()
+    destination_resolved = destination.resolve()
+    if destination_resolved == source_resolved:
+        raise HTTPException(status_code=400, detail="Path is already in that folder")
+    if source.is_dir():
+        source_prefix = str(source_resolved) + "/"
+        if str(destination_dir.resolve()).startswith(source_prefix):
+            raise HTTPException(
+                status_code=400, detail="Cannot move a folder into itself or its child"
+            )
+    if destination.exists():
+        raise HTTPException(
+            status_code=409,
+            detail="A path with that name already exists in destination",
+        )
+
+    destination.parent.mkdir(parents=True, exist_ok=True)
+    source.rename(destination)
+    moved_type = "folder" if destination.is_dir() else "file"
+    return str(destination.relative_to(config.WORKSPACE_ROOT)), moved_type
+
+
+def create_folder(folder_path: str) -> str:
+    target_path = resolve_workspace_path(folder_path)
+    _ensure_not_lib_path(target_path)
+    _ensure_writable_path(target_path)
+    if target_path.exists():
+        raise HTTPException(status_code=400, detail="Folder already exists")
+    target_path.mkdir(parents=True, exist_ok=False)
+    return target_path.name
+
+
+def delete_folder(folder_path: str) -> None:
+    target_path = resolve_workspace_path(folder_path)
+    _ensure_not_lib_path(target_path)
+    _ensure_writable_path(target_path)
+    if not target_path.exists():
+        raise HTTPException(status_code=404, detail="Folder not found")
+    if not target_path.is_dir():
+        raise HTTPException(status_code=400, detail="Path is not a directory")
+    shutil.rmtree(target_path)
+
+
+def collect_python_sources() -> dict[str, str]:
+    """Return all UTF-8 .py files under the workspace for browser-side Pyodide sync."""
+    result: dict[str, str] = {}
+    workspace = config.WORKSPACE_ROOT.resolve()
+    if not workspace.exists():
+        return result
+    for path in workspace.rglob("*.py"):
+        try:
+            rel = path.relative_to(workspace)
+        except ValueError:
+            continue
+        if any(part.startswith(".") for part in rel.parts):
+            continue
+        try:
+            key = str(rel).replace("\\", "/")
+            result[key] = path.read_text(encoding="utf-8")
+        except (UnicodeDecodeError, OSError):
+            continue
+    return result
diff --git a/src/static/codemirror.bundle.mjs b/src/static/codemirror.bundle.mjs
new file mode 100644
index 0000000..a9b19ef
--- /dev/null
+++ b/src/static/codemirror.bundle.mjs
@@ -0,0 +1,14 @@
+/* esm.sh - codemirror@6.0.2 */
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r=s(n);if(r===!1){t=!1;break}Array.isArray(r)&&(t=t===!0?r:hu(t,r))}if(t!==!0){let s,r;if(t===!1)r=n.changes.invertedDesc,s=pe.empty(e.doc.length);else{let o=n.changes.filter(t);s=o.changes,r=o.filtered.mapDesc(o.changes).invertedDesc}n=ee.create(e,s,n.selection&&n.selection.map(r),P.mapEffects(n.effects,r),n.annotations,n.scrollIntoView)}let i=e.facet(jl);for(let s=i.length-1;s>=0;s--){let r=i[s](n);r instanceof ee?n=r:Array.isArray(r)&&r.length==1&&r[0]instanceof ee?n=r[0]:n=Yl(e,_t(r),!1)}return n}function cu(n){let e=n.startState,t=e.facet(Ul),i=n;for(let s=t.length-1;s>=0;s--){let r=t[s](n);r&&Object.keys(r).length&&(i=_l(i,tr(e,r,n.changes.newLength),!0))}return i==n?n:ee.create(e,n.changes,n.selection,i.effects,i.annotations,i.scrollIntoView)}var uu=[];function _t(n){return n==null?uu:Array.isArray(n)?n:[n]}var q=(function(n){return n[n.Word=0]="Word",n[n.Space=1]="Space",n[n.Other=2]="Other",n})(q||(q={})),du=/[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/,ir;try{ir=new RegExp("[\\p{Alphabetic}\\p{Number}_]","u")}catch{}function pu(n){if(ir)return ir.test(n);for(let e=0;e<n.length;e++){let t=n[e];if(/\w/.test(t)||t>"\x80"&&(t.toUpperCase()!=t.toLowerCase()||du.test(t)))return!0}return!1}function mu(n){return e=>{if(!/\S/.test(e))return q.Space;if(pu(e))return q.Word;for(let t=0;t<n.length;t++)if(e.indexOf(n[t])>-1)return q.Word;return q.Other}}var j=class n{constructor(e,t,i,s,r,o){this.config=e,this.doc=t,this.selection=i,this.values=s,this.status=e.statusTemplate.slice(),this.computeSlot=r,o&&(o._state=this);for(let l=0;l<this.config.dynamicSlots.length;l++)di(this,l<<1);this.computeSlot=null}field(e,t=!0){let i=this.config.address[e.id];if(i==null){if(t)throw new RangeError("Field is not present in this state");return}return di(this,i),wn(this,i)}update(...e){return Yl(this,e,!0)}applyTransaction(e){let t=this.config,{base:i,compartments:s}=t;for(let l of e.effects)l.is(bn.reconfigure)?(t&&(s=new Map,t.compartments.forEach((a,f)=>s.set(f,a)),t=null),s.set(l.value.compartment,l.value.extension)):l.is(P.reconfigure)?(t=null,i=l.value):l.is(P.appendConfig)&&(t=null,i=_t(i).concat(l.value));let r;t?r=e.startState.values.slice():(t=xn.resolve(i,s,this),r=new n(t,this.doc,this.selection,t.dynamicSlots.map(()=>null),(a,f)=>f.reconfigure(a,this),null).values);let o=e.startState.facet(Qs)?e.newSelection:e.newSelection.asSingle();new n(t,e.newDoc,o,r,(l,a)=>a.update(l,e),e)}replaceSelection(e){return typeof e=="string"&&(e=this.toText(e)),this.changeByRange(t=>({changes:{from:t.from,to:t.to,insert:e},range:b.cursor(t.from+e.length)}))}changeByRange(e){let t=this.selection,i=e(t.ranges[0]),s=this.changes(i.changes),r=[i.range],o=_t(i.effects);for(let l=1;l<t.ranges.length;l++){let a=e(t.ranges[l]),f=this.changes(a.changes),h=f.map(s);for(let u=0;u<l;u++)r[u]=r[u].map(h);let c=s.mapDesc(f,!0);r.push(a.range.map(c)),s=s.compose(h),o=P.mapEffects(o,h).concat(P.mapEffects(_t(a.effects),c))}return{changes:s,selection:b.create(r,t.mainIndex),effects:o}}changes(e=[]){return e instanceof pe?e:pe.of(e,this.doc.length,this.facet(n.lineSeparator))}toText(e){return N.of(e.split(this.facet(n.lineSeparator)||_s))}sliceDoc(e=0,t=this.doc.length){return this.doc.sliceString(e,t,this.lineBreak)}facet(e){let t=this.config.address[e.id];return t==null?e.default:(di(this,t),wn(this,t))}toJSON(e){let t={doc:this.sliceDoc(),selection:this.selection.toJSON()};if(e)for(let i in e){let s=e[i];s instanceof J&&this.config.address[s.id]!=null&&(t[i]=s.spec.toJSON(this.field(e[i]),this))}return t}static fromJSON(e,t={},i){if(!e||typeof e.doc!="string")throw new RangeError("Invalid JSON representation for EditorState");let s=[];if(i){for(let r in i)if(Object.prototype.hasOwnProperty.call(e,r)){let o=i[r],l=e[r];s.push(o.init(a=>o.spec.fromJSON(l,a)))}}return n.create({doc:e.doc,selection:b.fromJSON(e.selection),extensions:t.extensions?s.concat([t.extensions]):s})}static create(e={}){let t=xn.resolve(e.extensions||[],new Map),i=e.doc instanceof N?e.doc:N.of((e.doc||"").split(t.staticFacet(n.lineSeparator)||_s)),s=e.selection?e.selection instanceof b?e.selection:b.single(e.selection.anchor,e.selection.head):b.single(0);return zl(s,i.length),t.staticFacet(Qs)||(s=s.asSingle()),new n(t,i,s,t.dynamicSlots.map(()=>null),(r,o)=>o.create(r),null)}get tabSize(){return this.facet(n.tabSize)}get lineBreak(){return this.facet(n.lineSeparator)||`
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t.length==i.length&&t.every(s=>n[s]==e[s])}});j.languageData=ql;j.changeFilter=$l;j.transactionFilter=jl;j.transactionExtender=Ul;bn.reconfigure=P.define();function fe(n,e,t={}){let i={};for(let s of n)for(let r of Object.keys(s)){let o=s[r],l=i[r];if(l===void 0)i[r]=o;else if(!(l===o||o===void 0))if(Object.hasOwnProperty.call(t,r))i[r]=t[r](l,o);else throw new Error("Config merge conflict for field "+r)}for(let s in e)i[s]===void 0&&(i[s]=e[s]);return i}var He=class{eq(e){return this==e}range(e,t=e){return mi.create(e,t,this)}};He.prototype.startSide=He.prototype.endSide=0;He.prototype.point=!1;He.prototype.mapMode=re.TrackDel;var mi=class n{constructor(e,t,i){this.from=e,this.to=t,this.value=i}static create(e,t,i){return new n(e,t,i)}};function nr(n,e){return n.from-e.from||n.value.startSide-e.value.startSide}var sr=class n{constructor(e,t,i,s){this.from=e,this.to=t,this.value=i,this.maxPoint=s}get length(){return this.to[this.to.length-1]}findIndex(e,t,i,s=0){let 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n(e,t,i,s)}get length(){let e=this.chunk.length-1;return e<0?0:Math.max(this.chunkEnd(e),this.nextLayer.length)}get size(){if(this.isEmpty)return 0;let e=this.nextLayer.size;for(let t of this.chunk)e+=t.value.length;return e}chunkEnd(e){return this.chunkPos[e]+this.chunk[e].length}update(e){let{add:t=[],sort:i=!1,filterFrom:s=0,filterTo:r=this.length}=e,o=e.filter;if(t.length==0&&!o)return this;if(i&&(t=t.slice().sort(nr)),this.isEmpty)return t.length?n.of(t):this;let l=new vn(this,null,-1).goto(0),a=0,f=[],h=new ke;for(;l.value||a<t.length;)if(a<t.length&&(l.from-t[a].from||l.startSide-t[a].value.startSide)>=0){let c=t[a++];h.addInner(c.from,c.to,c.value)||f.push(c)}else 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a=s==e.length?null:e[s],f=o-l,h=a?a.fromB:1e9;for(;r<t.length&&t[r]<h;){let c=t[r],u=t[r+1],d=Math.max(l,c),p=Math.min(h,u);if(d<=p&&new n(d+f,p+f,d,p).addToSet(i),u>h)break;r+=2}if(!a)return i;new n(a.fromA,a.toA,a.fromB,a.toB).addToSet(i),o=a.toA,l=a.toB}}},Kn=class n{constructor(e,t,i){this.view=e,this.state=t,this.transactions=i,this.flags=0,this.startState=e.state,this.changes=pe.empty(this.startState.doc.length);for(let r of i)this.changes=this.changes.compose(r.changes);let s=[];this.changes.iterChangedRanges((r,o,l,a)=>s.push(new Xe(r,o,l,a))),this.changedRanges=s}static create(e,t,i){return new n(e,t,i)}get viewportChanged(){return(this.flags&4)>0}get viewportMoved(){return(this.flags&8)>0}get heightChanged(){return(this.flags&2)>0}get geometryChanged(){return this.docChanged||(this.flags&18)>0}get focusChanged(){return(this.flags&1)>0}get docChanged(){return!this.changes.empty}get selectionSet(){return this.transactions.some(e=>e.selection)}get empty(){return 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s=-1;this.view.inputState.composing>=0&&!this.view.observer.editContext&&(!((t=this.domChanged)===null||t===void 0)&&t.newSel?s=this.domChanged.newSel.head:!Uu(e.changes,this.hasComposition)&&!e.selectionSet&&(s=e.state.selection.main.head));let r=s>-1?zu(this.view,e.changes,s):null;if(this.domChanged=null,this.hasComposition){this.markedForComposition.clear();let{from:f,to:h}=this.hasComposition;i=new Xe(f,h,e.changes.mapPos(f,-1),e.changes.mapPos(h,1)).addToSet(i.slice())}this.hasComposition=r?{from:r.range.fromB,to:r.range.toB}:null,(D.ie||D.chrome)&&!r&&e&&e.state.doc.lines!=e.startState.doc.lines&&(this.forceSelection=!0);let o=this.decorations,l=this.updateDeco(),a=$u(o,l,e.changes);return i=Xe.extendWithRanges(i,a),!(this.flags&7)&&i.length==0?!1:(this.updateInner(i,e.startState.doc.length,r),e.transactions.length&&(this.lastUpdate=Date.now()),!0)}updateInner(e,t,i){this.view.viewState.mustMeasureContent=!0,this.updateChildren(e,t,i);let{observer:s}=this.view;s.ignore(()=>{this.dom.style.height=this.view.viewState.contentHeight/this.view.scaleY+"px",this.dom.style.flexBasis=this.minWidth?this.minWidth+"px":"";let o=D.chrome||D.ios?{node:s.selectionRange.focusNode,written:!1}:void 0;this.sync(this.view,o),this.flags&=-8,o&&(o.written||s.selectionRange.focusNode!=o.node)&&(this.forceSelection=!0),this.dom.style.height=""}),this.markedForComposition.forEach(o=>o.flags&=-9);let r=[];if(this.view.viewport.from||this.view.viewport.to<this.view.state.doc.length)for(let o of this.children)o instanceof Ot&&o.widget instanceof Ii&&r.push(o.dom);s.updateGaps(r)}updateChildren(e,t,i){let s=i?i.range.addToSet(e.slice()):e,r=this.childCursor(t);for(let o=s.length-1;;o--){let l=o>=0?s[o]:null;if(!l)break;let{fromA:a,toA:f,fromB:h,toB:c}=l,u,d,p,m;if(i&&i.range.fromB<c&&i.range.toB>h){let k=Si.build(this.view.state.doc,h,i.range.fromB,this.decorations,this.dynamicDecorationMap),v=Si.build(this.view.state.doc,i.range.toB,c,this.decorations,this.dynamicDecorationMap);d=k.breakAtStart,p=k.openStart,m=v.openEnd;let S=this.compositionView(i);v.breakAtStart?S.breakAfter=1:v.content.length&&S.merge(S.length,S.length,v.content[0],!1,v.openStart,0)&&(S.breakAfter=v.content[0].breakAfter,v.content.shift()),k.content.length&&S.merge(0,0,k.content[k.content.length-1],!0,0,k.openEnd)&&k.content.pop(),u=k.content.concat(S).concat(v.content)}else({content:u,breakAtStart:d,openStart:p,openEnd:m}=Si.build(this.view.state.doc,h,c,this.decorations,this.dynamicDecorationMap));let{i:g,off:y}=r.findPos(f,1),{i:x,off:w}=r.findPos(a,-1);Ja(this,x,w,g,y,u,d,p,m)}i&&this.fixCompositionDOM(i)}updateEditContextFormatting(e){this.editContextFormatting=this.editContextFormatting.map(e.changes);for(let t of e.transactions)for(let i of t.effects)i.is(gh)&&(this.editContextFormatting=i.value)}compositionView(e){let t=new Ze(e.text.nodeValue);t.flags|=8;for(let{deco:s}of e.marks)t=new dt(s,[t],t.length);let i=new le;return i.append(t,0),i}fixCompositionDOM(e){let t=(r,o)=>{o.flags|=8|(o.children.some(a=>a.flags&7)?1:0),this.markedForComposition.add(o);let l=G.get(r);l&&l!=o&&(l.dom=null),o.setDOM(r)},i=this.childPos(e.range.fromB,1),s=this.children[i.i];t(e.line,s);for(let r=e.marks.length-1;r>=-1;r--)i=s.childPos(i.off,1),s=s.children[i.i],t(r>=0?e.marks[r].node:e.text,s)}updateSelection(e=!1,t=!1){(e||!this.view.observer.selectionRange.focusNode)&&this.view.observer.readSelectionRange();let i=this.view.root.activeElement,s=i==this.dom,r=!s&&!(this.view.state.facet(at)||this.dom.tabIndex>-1)&&Rn(this.dom,this.view.observer.selectionRange)&&!(i&&this.dom.contains(i));if(!(s||t||r))return;let o=this.forceSelection;this.forceSelection=!1;let l=this.view.state.selection.main,a=this.moveToLine(this.domAtPos(l.anchor)),f=l.empty?a:this.moveToLine(this.domAtPos(l.head));if(D.gecko&&l.empty&&!this.hasComposition&&Wu(a)){let c=document.createTextNode("");this.view.observer.ignore(()=>a.node.insertBefore(c,a.node.childNodes[a.offset]||null)),a=f=new ge(c,0),o=!0}let h=this.view.observer.selectionRange;(o||!h.focusNode||(!ki(a.node,a.offset,h.anchorNode,h.anchorOffset)||!ki(f.node,f.offset,h.focusNode,h.focusOffset))&&!this.suppressWidgetCursorChange(h,l))&&(this.view.observer.ignore(()=>{D.android&&D.chrome&&this.dom.contains(h.focusNode)&&ju(h.focusNode,this.dom)&&(this.dom.blur(),this.dom.focus({preventScroll:!0}));let c=Bi(this.view.root);if(c)if(l.empty){if(D.gecko){let u=qu(a.node,a.offset);if(u&&u!=3){let d=(u==1?_a:Ya)(a.node,a.offset);d&&(a=new ge(d.node,d.offset))}}c.collapse(a.node,a.offset),l.bidiLevel!=null&&c.caretBidiLevel!==void 0&&(c.caretBidiLevel=l.bidiLevel)}else if(c.extend){c.collapse(a.node,a.offset);try{c.extend(f.node,f.offset)}catch{}}else{let u=document.createRange();l.anchor>l.head&&([a,f]=[f,a]),u.setEnd(f.node,f.offset),u.setStart(a.node,a.offset),c.removeAllRanges(),c.addRange(u)}r&&this.view.root.activeElement==this.dom&&(this.dom.blur(),i&&i.focus())}),this.view.observer.setSelectionRange(a,f)),this.impreciseAnchor=a.precise?null:new ge(h.anchorNode,h.anchorOffset),this.impreciseHead=f.precise?null:new ge(h.focusNode,h.focusOffset)}suppressWidgetCursorChange(e,t){return this.hasComposition&&t.empty&&ki(e.focusNode,e.focusOffset,e.anchorNode,e.anchorOffset)&&this.posFromDOM(e.focusNode,e.focusOffset)==t.head}enforceCursorAssoc(){if(this.hasComposition)return;let{view:e}=this,t=e.state.selection.main,i=Bi(e.root),{anchorNode:s,anchorOffset:r}=e.observer.selectionRange;if(!i||!t.empty||!t.assoc||!i.modify)return;let o=le.find(this,t.head);if(!o)return;let l=o.posAtStart;if(t.head==l||t.head==l+o.length)return;let a=this.coordsAt(t.head,-1),f=this.coordsAt(t.head,1);if(!a||!f||a.bottom>f.top)return;let h=this.domAtPos(t.head+t.assoc);i.collapse(h.node,h.offset),i.modify("move",t.assoc<0?"forward":"backward","lineboundary"),e.observer.readSelectionRange();let c=e.observer.selectionRange;e.docView.posFromDOM(c.anchorNode,c.anchorOffset)!=t.from&&i.collapse(s,r)}moveToLine(e){let t=this.dom,i;if(e.node!=t)return e;for(let s=e.offset;!i&&s<t.childNodes.length;s++){let r=G.get(t.childNodes[s]);r instanceof le&&(i=r.domAtPos(0))}for(let s=e.offset-1;!i&&s>=0;s--){let r=G.get(t.childNodes[s]);r instanceof le&&(i=r.domAtPos(r.length))}return i?new ge(i.node,i.offset,!0):e}nearest(e){for(let t=e;t;){let i=G.get(t);if(i&&i.rootView==this)return i;t=t.parentNode}return null}posFromDOM(e,t){let i=this.nearest(e);if(!i)throw new RangeError("Trying to find position for a DOM position outside of the document");return i.localPosFromDOM(e,t)+i.posAtStart}domAtPos(e){let{i:t,off:i}=this.childCursor().findPos(e,-1);for(;t<this.children.length-1;){let s=this.children[t];if(i<s.length||s instanceof le)break;t++,i=0}return this.children[t].domAtPos(i)}coordsAt(e,t){let i=null,s=0;for(let r=this.length,o=this.children.length-1;o>=0;o--){let l=this.children[o],a=r-l.breakAfter,f=a-l.length;if(a<e)break;if(f<=e&&(f<e||l.covers(-1))&&(a>e||l.covers(1))&&(!i||l instanceof le&&!(i instanceof le&&t>=0)))i=l,s=f;else if(i&&f==e&&a==e&&l instanceof Ot&&Math.abs(t)<2){if(l.deco.startSide<0)break;o&&(i=null)}r=f}return i?i.coordsAt(e-s,t):null}coordsForChar(e){let{i:t,off:i}=this.childPos(e,1),s=this.children[t];if(!(s instanceof le))return null;for(;s.children.length;){let{i:l,off:a}=s.childPos(i,1);for(;;l++){if(l==s.children.length)return null;if((s=s.children[l]).length)break}i=a}if(!(s instanceof Ze))return null;let r=Q(s.text,i);if(r==i)return null;let o=Et(s.dom,i,r).getClientRects();for(let l=0;l<o.length;l++){let a=o[l];if(l==o.length-1||a.top<a.bottom&&a.left<a.right)return a}return null}measureVisibleLineHeights(e){let t=[],{from:i,to:s}=e,r=this.view.contentDOM.clientWidth,o=r>Math.max(this.view.scrollDOM.clientWidth,this.minWidth)+1,l=-1,a=this.view.textDirection==K.LTR;for(let f=0,h=0;h<this.children.length;h++){let c=this.children[h],u=f+c.length;if(u>s)break;if(f>=i){let d=c.dom.getBoundingClientRect();if(t.push(d.height),o){let p=c.dom.lastChild,m=p?Ei(p):[];if(m.length){let g=m[m.length-1],y=a?g.right-d.left:d.right-g.left;y>l&&(l=y,this.minWidth=r,this.minWidthFrom=f,this.minWidthTo=u)}}}f=u+c.breakAfter}return t}textDirectionAt(e){let{i:t}=this.childPos(e,1);return getComputedStyle(this.children[t].dom).direction=="rtl"?K.RTL:K.LTR}measureTextSize(){for(let r of this.children)if(r instanceof le){let o=r.measureTextSize();if(o)return o}let e=document.createElement("div"),t,i,s;return e.className="cm-line",e.style.width="99999px",e.style.position="absolute",e.textContent="abc def ghi jkl mno pqr stu",this.view.observer.ignore(()=>{this.dom.appendChild(e);let r=Ei(e.firstChild)[0];t=e.getBoundingClientRect().height,i=r?r.width/27:7,s=r?r.height:t,e.remove()}),{lineHeight:t,charWidth:i,textHeight:s}}childCursor(e=this.length){let t=this.children.length;return t&&(e-=this.children[--t].length),new zn(this.children,e,t)}computeBlockGapDeco(){let e=[],t=this.view.viewState;for(let i=0,s=0;;s++){let r=s==t.viewports.length?null:t.viewports[s],o=r?r.from-1:this.length;if(o>i){let l=(t.lineBlockAt(o).bottom-t.lineBlockAt(i).top)/this.view.scaleY;e.push(B.replace({widget:new Ii(l),block:!0,inclusive:!0,isBlockGap:!0}).range(i,o))}if(!r)break;i=r.to+1}return B.set(e)}updateDeco(){let e=1,t=this.view.state.facet(Ni).map(r=>(this.dynamicDecorationMap[e++]=typeof r=="function")?r(this.view):r),i=!1,s=this.view.state.facet(bh).map((r,o)=>{let l=typeof r=="function";return l&&(i=!0),l?r(this.view):r});for(s.length&&(this.dynamicDecorationMap[e++]=i,t.push(W.join(s))),this.decorations=[this.editContextFormatting,...t,this.computeBlockGapDeco(),this.view.viewState.lineGapDeco];e<this.decorations.length;)this.dynamicDecorationMap[e++]=!1;return this.decorations}scrollIntoView(e){if(e.isSnapshot){let f=this.view.viewState.lineBlockAt(e.range.head);this.view.scrollDOM.scrollTop=f.top-e.yMargin,this.view.scrollDOM.scrollLeft=e.xMargin;return}for(let f of this.view.state.facet(mh))try{if(f(this.view,e.range,e))return!0}catch(h){ae(this.view.state,h,"scroll handler")}let{range:t}=e,i=this.coordsAt(t.head,t.empty?t.assoc:t.head>t.anchor?-1:1),s;if(!i)return;!t.empty&&(s=this.coordsAt(t.anchor,t.anchor>t.head?-1:1))&&(i={left:Math.min(i.left,s.left),top:Math.min(i.top,s.top),right:Math.max(i.right,s.right),bottom:Math.max(i.bottom,s.bottom)});let r=fo(this.view),o={left:i.left-r.left,top:i.top-r.top,right:i.right+r.right,bottom:i.bottom+r.bottom},{offsetWidth:l,offsetHeight:a}=this.view.scrollDOM;wu(this.view.scrollDOM,o,t.head<t.anchor?-1:1,e.x,e.y,Math.max(Math.min(e.xMargin,l),-l),Math.max(Math.min(e.yMargin,a),-a),this.view.textDirection==K.LTR)}lineHasWidget(e){let{i:t}=this.childCursor().findPos(e);if(t==this.children.length)return!1;let i=s=>s instanceof ii||s.children.some(i);return i(this.children[t])}};function Wu(n){return n.node.nodeType==1&&n.node.firstChild&&(n.offset==0||n.node.childNodes[n.offset-1].contentEditable=="false")&&(n.offset==n.node.childNodes.length||n.node.childNodes[n.offset].contentEditable=="false")}function vh(n,e){let t=n.observer.selectionRange;if(!t.focusNode)return null;let i=_a(t.focusNode,t.focusOffset),s=Ya(t.focusNode,t.focusOffset),r=i||s;if(s&&i&&s.node!=i.node){let l=G.get(s.node);if(!l||l instanceof Ze&&l.text!=s.node.nodeValue)r=s;else if(n.docView.lastCompositionAfterCursor){let a=G.get(i.node);!a||a instanceof Ze&&a.text!=i.node.nodeValue||(r=s)}}if(n.docView.lastCompositionAfterCursor=r!=i,!r)return null;let o=e-r.offset;return{from:o,to:o+r.node.nodeValue.length,node:r.node}}function zu(n,e,t){let i=vh(n,t);if(!i)return null;let{node:s,from:r,to:o}=i,l=s.nodeValue;if(/[\n\r]/.test(l)||n.state.doc.sliceString(i.from,i.to)!=l)return null;let a=e.invertedDesc,f=new Xe(a.mapPos(r),a.mapPos(o),r,o),h=[];for(let c=s.parentNode;;c=c.parentNode){let u=G.get(c);if(u instanceof dt)h.push({node:c,deco:u.mark});else{if(u instanceof le||c.nodeName=="DIV"&&c.parentNode==n.contentDOM)return{range:f,text:s,marks:h,line:c};if(c!=n.contentDOM)h.push({node:c,deco:new Li({inclusive:!0,attributes:Du(c),tagName:c.tagName.toLowerCase()})});else return null}}}function qu(n,e){return n.nodeType!=1?0:(e&&n.childNodes[e-1].contentEditable=="false"?1:0)|(e<n.childNodes.length&&n.childNodes[e].contentEditable=="false"?2:0)}var Ku=class{constructor(){this.changes=[]}compareRange(e,t){In(e,t,this.changes)}comparePoint(e,t){In(e,t,this.changes)}boundChange(e){In(e,e,this.changes)}};function $u(n,e,t){let i=new Ku;return W.compare(n,e,t,i),i.changes}function ju(n,e){for(let t=n;t&&t!=e;t=t.assignedSlot||t.parentNode)if(t.nodeType==1&&t.contentEditable=="false")return!0;return!1}function Uu(n,e){let t=!1;return e&&n.iterChangedRanges((i,s)=>{i<e.to&&s>e.from&&(t=!0)}),t}function Gu(n,e,t=1){let i=n.charCategorizer(e),s=n.doc.lineAt(e),r=e-s.from;if(s.length==0)return b.cursor(e);r==0?t=1:r==s.length&&(t=-1);let o=r,l=r;t<0?o=Q(s.text,r,!1):l=Q(s.text,r);let a=i(s.text.slice(o,l));for(;o>0;){let f=Q(s.text,o,!1);if(i(s.text.slice(f,o))!=a)break;o=f}for(;l<s.length;){let f=Q(s.text,l);if(i(s.text.slice(l,f))!=a)break;l=f}return b.range(o+s.from,l+s.from)}function _u(n,e){return e.left>n?e.left-n:Math.max(0,n-e.right)}function Yu(n,e){return e.top>n?e.top-n:Math.max(0,n-e.bottom)}function cr(n,e){return n.top<e.bottom-1&&n.bottom>e.top+1}function ha(n,e){return e<n.top?{top:e,left:n.left,right:n.right,bottom:n.bottom}:n}function fa(n,e){return e>n.bottom?{top:n.top,left:n.left,right:n.right,bottom:e}:n}function Or(n,e,t){let i,s,r,o,l=!1,a,f,h,c;for(let p=n.firstChild;p;p=p.nextSibling){let m=Ei(p);for(let g=0;g<m.length;g++){let y=m[g];s&&cr(s,y)&&(y=ha(fa(y,s.bottom),s.top));let x=_u(e,y),w=Yu(t,y);if(x==0&&w==0)return p.nodeType==3?ca(p,e,t):Or(p,e,t);(!i||o>w||o==w&&r>x)&&(i=p,s=y,r=x,o=w,l=x?e<y.left?g>0:g<m.length-1:!0),x==0?t>y.bottom&&(!h||h.bottom<y.bottom)?(a=p,h=y):t<y.top&&(!c||c.top>y.top)&&(f=p,c=y):h&&cr(h,y)?h=fa(h,y.bottom):c&&cr(c,y)&&(c=ha(c,y.top))}}if(h&&h.bottom>=t?(i=a,s=h):c&&c.top<=t&&(i=f,s=c),!i)return{node:n,offset:0};let u=Math.max(s.left,Math.min(s.right,e));if(i.nodeType==3)return ca(i,u,t);if(l&&i.contentEditable!="false")return Or(i,u,t);let d=Array.prototype.indexOf.call(n.childNodes,i)+(e>=(s.left+s.right)/2?1:0);return{node:n,offset:d}}function ca(n,e,t){let i=n.nodeValue.length,s=-1,r=1e9,o=0;for(let l=0;l<i;l++){let a=Et(n,l,l+1).getClientRects();for(let f=0;f<a.length;f++){let h=a[f];if(h.top==h.bottom)continue;o||(o=e-h.left);let c=(h.top>t?h.top-t:t-h.bottom)-1;if(h.left-1<=e&&h.right+1>=e&&c<r){let u=e>=(h.left+h.right)/2,d=u;if(D.chrome||D.gecko){let p=Et(n,l).getBoundingClientRect();Math.abs(p.left-h.right)<.1&&(d=!u)}if(c<=0)return{node:n,offset:l+(d?1:0)};s=l+(d?1:0),r=c}}}return{node:n,offset:s>-1?s:o>0?n.nodeValue.length:0}}function kh(n,e,t,i=-1){var s,r;let o=n.contentDOM.getBoundingClientRect(),l=o.top+n.viewState.paddingTop,a,{docHeight:f}=n.viewState,{x:h,y:c}=e,u=c-l;if(u<0)return 0;if(u>f)return n.state.doc.length;for(let k=n.viewState.heightOracle.textHeight/2,v=!1;a=n.elementAtHeight(u),a.type!=ye.Text;)for(;u=i>0?a.bottom+k:a.top-k,!(u>=0&&u<=f);){if(v)return t?null:0;v=!0,i=-i}c=l+u;let d=a.from;if(d<n.viewport.from)return n.viewport.from==0?0:t?null:ua(n,o,a,h,c);if(d>n.viewport.to)return n.viewport.to==n.state.doc.length?n.state.doc.length:t?null:ua(n,o,a,h,c);let p=n.dom.ownerDocument,m=n.root.elementFromPoint?n.root:p,g=m.elementFromPoint(h,c);g&&!n.contentDOM.contains(g)&&(g=null),g||(h=Math.max(o.left+1,Math.min(o.right-1,h)),g=m.elementFromPoint(h,c),g&&!n.contentDOM.contains(g)&&(g=null));let y,x=-1;if(g&&((s=n.docView.nearest(g))===null||s===void 0?void 0:s.isEditable)!=!1){if(p.caretPositionFromPoint){let k=p.caretPositionFromPoint(h,c);k&&({offsetNode:y,offset:x}=k)}else if(p.caretRangeFromPoint){let k=p.caretRangeFromPoint(h,c);k&&({startContainer:y,startOffset:x}=k)}y&&(!n.contentDOM.contains(y)||D.safari&&Ju(y,x,h)||D.chrome&&Xu(y,x,h))&&(y=void 0),y&&(x=Math.min(Qe(y),x))}if(!y||!n.docView.dom.contains(y)){let k=le.find(n.docView,d);if(!k)return u>a.top+a.height/2?a.to:a.from;({node:y,offset:x}=Or(k.dom,h,c))}let w=n.docView.nearest(y);if(!w)return null;if(w.isWidget&&((r=w.dom)===null||r===void 0?void 0:r.nodeType)==1){let k=w.dom.getBoundingClientRect();return e.y<k.top||e.y<=k.bottom&&e.x<=(k.left+k.right)/2?w.posAtStart:w.posAtEnd}else return w.localPosFromDOM(y,x)+w.posAtStart}function ua(n,e,t,i,s){let r=Math.round((i-e.left)*n.defaultCharacterWidth);if(n.lineWrapping&&t.height>n.defaultLineHeight*1.5){let l=n.viewState.heightOracle.textHeight,a=Math.floor((s-t.top-(n.defaultLineHeight-l)*.5)/l);r+=a*n.viewState.heightOracle.lineLength}let o=n.state.sliceDoc(t.from,t.to);return t.from+kn(o,r,n.state.tabSize)}function Sh(n,e,t){let i,s=n;if(n.nodeType!=3||e!=(i=n.nodeValue.length))return!1;for(;;){let r=s.nextSibling;if(r){if(r.nodeName=="BR")break;return!1}else{let o=s.parentNode;if(!o||o.nodeName=="DIV")break;s=o}}return Et(n,i-1,i).getBoundingClientRect().right>t}function Ju(n,e,t){return Sh(n,e,t)}function Xu(n,e,t){if(e!=0)return Sh(n,e,t);for(let s=n;;){let r=s.parentNode;if(!r||r.nodeType!=1||r.firstChild!=s)return!1;if(r.classList.contains("cm-line"))break;s=r}let i=n.nodeType==1?n.getBoundingClientRect():Et(n,0,Math.max(n.nodeValue.length,1)).getBoundingClientRect();return t-i.left>5}function Br(n,e,t){let i=n.lineBlockAt(e);if(Array.isArray(i.type)){let s;for(let r of i.type){if(r.from>e)break;if(!(r.to<e)){if(r.from<e&&r.to>e)return r;(!s||r.type==ye.Text&&(s.type!=r.type||(t<0?r.from<e:r.to>e)))&&(s=r)}}return s||i}return i}function Qu(n,e,t,i){let s=Br(n,e.head,e.assoc||-1),r=!i||s.type!=ye.Text||!(n.lineWrapping||s.widgetLineBreaks)?null:n.coordsAtPos(e.assoc<0&&e.head>s.from?e.head-1:e.head);if(r){let o=n.dom.getBoundingClientRect(),l=n.textDirectionAt(s.from),a=n.posAtCoords({x:t==(l==K.LTR)?o.right-1:o.left+1,y:(r.top+r.bottom)/2});if(a!=null)return b.cursor(a,t?-1:1)}return b.cursor(t?s.to:s.from,t?-1:1)}function da(n,e,t,i){let s=n.state.doc.lineAt(e.head),r=n.bidiSpans(s),o=n.textDirectionAt(s.from);for(let l=e,a=null;;){let f=Fu(s,r,o,l,t),h=oh;if(!f){if(s.number==(t?n.state.doc.lines:1))return l;h=`
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a=i||t||(e-r<o-e?-1:1);e=a<0?r:o,i=a}});if(!i)return e}}function Ch(n,e){let t=null;for(let i=0;i<e.ranges.length;i++){let s=e.ranges[i],r=null;if(s.empty){let o=Mi(n,s.from,0);o!=s.from&&(r=b.cursor(o,-1))}else{let o=Mi(n,s.from,-1),l=Mi(n,s.to,1);(o!=s.from||l!=s.to)&&(r=b.range(s.from==s.anchor?o:l,s.from==s.head?o:l))}r&&(t||(t=e.ranges.slice()),t[i]=r)}return t?b.create(t,e.mainIndex):e}function ur(n,e,t){let i=Mi(n.state.facet(Vi).map(s=>s(n)),t.from,e.head>t.from?-1:1);return i==t.from?t:b.cursor(i,i<t.from?1:-1)}var xi="\uFFFF",Er=class{constructor(e,t){this.points=e,this.text="",this.lineSeparator=t.facet(j.lineSeparator)}append(e){this.text+=e}lineBreak(){this.text+=xi}readRange(e,t){if(!e)return this;let i=e.parentNode;for(let s=e;;){this.findPointBefore(i,s);let r=this.text.length;this.readNode(s);let o=s.nextSibling;if(o==t)break;let l=G.get(s),a=G.get(o);(l&&a?l.breakAfter:(l?l.breakAfter:Wn(s))||Wn(o)&&(s.nodeName!="BR"||s.cmIgnore)&&this.text.length>r)&&!id(o,t)&&this.lineBreak(),s=o}return this.findPointBefore(i,t),this}readTextNode(e){let t=e.nodeValue;for(let i of this.points)i.node==e&&(i.pos=this.text.length+Math.min(i.offset,t.length));for(let i=0,s=this.lineSeparator?null:/\r\n?|\n/g;;){let r=-1,o=1,l;if(this.lineSeparator?(r=t.indexOf(this.lineSeparator,i),o=this.lineSeparator.length):(l=s.exec(t))&&(r=l.index,o=l[0].length),this.append(t.slice(i,r<0?t.length:r)),r<0)break;if(this.lineBreak(),o>1)for(let a of this.points)a.node==e&&a.pos>this.text.length&&(a.pos-=o-1);i=r+o}}readNode(e){if(e.cmIgnore)return;let t=G.get(e),i=t&&t.overrideDOMText;if(i!=null){this.findPointInside(e,i.length);for(let s=i.iter();!s.next().done;)s.lineBreak?this.lineBreak():this.append(s.value)}else e.nodeType==3?this.readTextNode(e):e.nodeName=="BR"?e.nextSibling&&this.lineBreak():e.nodeType==1&&this.readRange(e.firstChild,null)}findPointBefore(e,t){for(let i of this.points)i.node==e&&e.childNodes[i.offset]==t&&(i.pos=this.text.length)}findPointInside(e,t){for(let i of this.points)(e.nodeType==3?i.node==e:e.contains(i.node))&&(i.pos=this.text.length+(td(e,i.node,i.offset)?t:0))}};function td(n,e,t){for(;;){if(!e||t<Qe(e))return!1;if(e==n)return!0;t=Bt(e)+1,e=e.parentNode}}function id(n,e){let t;for(;!(n==e||!n);n=n.nextSibling){let i=G.get(n);if(!(i?.isWidget||n.cmIgnore))return!1;i&&(t||(t=[])).push(i)}if(t)for(let i of t){let s=i.overrideDOMText;if(s?.length)return!1}return!0}var jn=class{constructor(e,t){this.node=e,this.offset=t,this.pos=-1}},Pr=class{constructor(e,t,i,s){this.typeOver=s,this.bounds=null,this.text="",this.domChanged=t>-1;let{impreciseHead:r,impreciseAnchor:o}=e.docView;if(e.state.readOnly&&t>-1)this.newSel=null;else if(t>-1&&(this.bounds=e.docView.domBoundsAround(t,i,0))){let l=r||o?[]:sd(e),a=new Er(l,e.state);a.readRange(this.bounds.startDOM,this.bounds.endDOM),this.text=a.text,this.newSel=rd(l,this.bounds.from)}else{let l=e.observer.selectionRange,a=r&&r.node==l.focusNode&&r.offset==l.focusOffset||!vr(e.contentDOM,l.focusNode)?e.state.selection.main.head:e.docView.posFromDOM(l.focusNode,l.focusOffset),f=o&&o.node==l.anchorNode&&o.offset==l.anchorOffset||!vr(e.contentDOM,l.anchorNode)?e.state.selection.main.anchor:e.docView.posFromDOM(l.anchorNode,l.anchorOffset),h=e.viewport;if((D.ios||D.chrome)&&e.state.selection.main.empty&&a!=f&&(h.from>0||h.to<e.state.doc.length)){let c=Math.min(a,f),u=Math.max(a,f),d=h.from-c,p=h.to-u;(d==0||d==1||c==0)&&(p==0||p==-1||u==e.state.doc.length)&&(a=0,f=e.state.doc.length)}e.inputState.composing>-1&&e.state.selection.ranges.length>1?this.newSel=e.state.selection.replaceRange(b.range(f,a)):this.newSel=b.single(f,a)}}};function Ah(n,e){let t,{newSel:i}=e,s=n.state.selection.main,r=n.inputState.lastKeyTime>Date.now()-100?n.inputState.lastKeyCode:-1;if(e.bounds){let{from:o,to:l}=e.bounds,a=s.from,f=null;(r===8||D.android&&e.text.length<l-o)&&(a=s.to,f="end");let h=Mh(n.state.doc.sliceString(o,l,xi),e.text,a-o,f);h&&(D.chrome&&r==13&&h.toB==h.from+2&&e.text.slice(h.from,h.toB)==xi+xi&&h.toB--,t={from:o+h.from,to:o+h.toA,insert:N.of(e.text.slice(h.from,h.toB).split(xi))})}else i&&(!n.hasFocus&&n.state.facet(at)||i.main.eq(s))&&(i=null);if(!t&&!i)return!1;if(!t&&e.typeOver&&!s.empty&&i&&i.main.empty?t={from:s.from,to:s.to,insert:n.state.doc.slice(s.from,s.to)}:(D.mac||D.android)&&t&&t.from==t.to&&t.from==s.head-1&&/^\. ?$/.test(t.insert.toString())&&n.contentDOM.getAttribute("autocorrect")=="off"?(i&&t.insert.length==2&&(i=b.single(i.main.anchor-1,i.main.head-1)),t={from:t.from,to:t.to,insert:N.of([t.insert.toString().replace("."," ")])}):t&&t.from>=s.from&&t.to<=s.to&&(t.from!=s.from||t.to!=s.to)&&s.to-s.from-(t.to-t.from)<=4?t={from:s.from,to:s.to,insert:n.state.doc.slice(s.from,t.from).append(t.insert).append(n.state.doc.slice(t.to,s.to))}:n.state.doc.lineAt(s.from).to<s.to&&n.docView.lineHasWidget(s.to)&&n.inputState.insertingTextAt>Date.now()-50?t={from:s.from,to:s.to,insert:n.state.toText(n.inputState.insertingText)}:D.chrome&&t&&t.from==t.to&&t.from==s.head&&t.insert.toString()==`
+ `&&n.lineWrapping&&(i&&(i=b.single(i.main.anchor-1,i.main.head-1)),t={from:s.from,to:s.to,insert:N.of([" "])}),t)return co(n,t,i,r);if(i&&!i.main.eq(s)){let o=!1,l="select";return n.inputState.lastSelectionTime>Date.now()-50&&(n.inputState.lastSelectionOrigin=="select"&&(o=!0),l=n.inputState.lastSelectionOrigin,l=="select.pointer"&&(i=Ch(n.state.facet(Vi).map(a=>a(n)),i))),n.dispatch({selection:i,scrollIntoView:o,userEvent:l}),!0}else return!1}function co(n,e,t,i=-1){if(D.ios&&n.inputState.flushIOSKey(e))return!0;let s=n.state.selection.main;if(D.android&&(e.to==s.to&&(e.from==s.from||e.from==s.from-1&&n.state.sliceDoc(e.from,s.from)==" ")&&e.insert.length==1&&e.insert.lines==2&&ti(n.contentDOM,"Enter",13)||(e.from==s.from-1&&e.to==s.to&&e.insert.length==0||i==8&&e.insert.length<e.to-e.from&&e.to>s.head)&&ti(n.contentDOM,"Backspace",8)||e.from==s.from&&e.to==s.to+1&&e.insert.length==0&&ti(n.contentDOM,"Delete",46)))return!0;let r=e.insert.toString();n.inputState.composing>=0&&n.inputState.composing++;let o,l=()=>o||(o=nd(n,e,t));return n.state.facet(ch).some(a=>a(n,e.from,e.to,r,l))||n.dispatch(l()),!0}function nd(n,e,t){let i,s=n.state,r=s.selection.main,o=-1;if(e.from==e.to&&e.from<r.from||e.from>r.to){let a=e.from<r.from?-1:1,f=a<0?r.from:r.to,h=Mi(s.facet(Vi).map(c=>c(n)),f,a);e.from==h&&(o=h)}if(o>-1)i={changes:e,selection:b.cursor(e.from+e.insert.length,-1)};else if(e.from>=r.from&&e.to<=r.to&&e.to-e.from>=(r.to-r.from)/3&&(!t||t.main.empty&&t.main.from==e.from+e.insert.length)&&n.inputState.composing<0){let a=r.from<e.from?s.sliceDoc(r.from,e.from):"",f=r.to>e.to?s.sliceDoc(e.to,r.to):"";i=s.replaceSelection(n.state.toText(a+e.insert.sliceString(0,void 0,n.state.lineBreak)+f))}else{let a=s.changes(e),f=t&&t.main.to<=a.newLength?t.main:void 0;if(s.selection.ranges.length>1&&(n.inputState.composing>=0||n.inputState.compositionPendingChange)&&e.to<=r.to+10&&e.to>=r.to-10){let h=n.state.sliceDoc(e.from,e.to),c,u=t&&vh(n,t.main.head);if(u){let p=e.insert.length-(e.to-e.from);c={from:u.from,to:u.to-p}}else c=n.state.doc.lineAt(r.head);let d=r.to-e.to;i=s.changeByRange(p=>{if(p.from==r.from&&p.to==r.to)return{changes:a,range:f||p.map(a)};let m=p.to-d,g=m-h.length;if(n.state.sliceDoc(g,m)!=h||m>=c.from&&g<=c.to)return{range:p};let y=s.changes({from:g,to:m,insert:e.insert}),x=p.to-r.to;return{changes:y,range:f?b.range(Math.max(0,f.anchor+x),Math.max(0,f.head+x)):p.map(y)}})}else i={changes:a,selection:f&&s.selection.replaceRange(f)}}let l="input.type";return(n.composing||n.inputState.compositionPendingChange&&n.inputState.compositionEndedAt>Date.now()-50)&&(n.inputState.compositionPendingChange=!1,l+=".compose",n.inputState.compositionFirstChange&&(l+=".start",n.inputState.compositionFirstChange=!1)),s.update(i,{userEvent:l,scrollIntoView:!0})}function Mh(n,e,t,i){let s=Math.min(n.length,e.length),r=0;for(;r<s&&n.charCodeAt(r)==e.charCodeAt(r);)r++;if(r==s&&n.length==e.length)return null;let o=n.length,l=e.length;for(;o>0&&l>0&&n.charCodeAt(o-1)==e.charCodeAt(l-1);)o--,l--;if(i=="end"){let a=Math.max(0,r-Math.min(o,l));t-=o+a-r}if(o<r&&n.length<e.length){let a=t<=r&&t>=o?r-t:0;r-=a,l=r+(l-o),o=r}else if(l<r){let a=t<=r&&t>=l?r-t:0;r-=a,o=r+(o-l),l=r}return{from:r,toA:o,toB:l}}function sd(n){let e=[];if(n.root.activeElement!=n.contentDOM)return e;let{anchorNode:t,anchorOffset:i,focusNode:s,focusOffset:r}=n.observer.selectionRange;return t&&(e.push(new jn(t,i)),(s!=t||r!=i)&&e.push(new jn(s,r))),e}function rd(n,e){if(n.length==0)return null;let t=n[0].pos,i=n.length==2?n[1].pos:t;return t>-1&&i>-1?b.single(t+e,i+e):null}var Lr=class{setSelectionOrigin(e){this.lastSelectionOrigin=e,this.lastSelectionTime=Date.now()}constructor(e){this.view=e,this.lastKeyCode=0,this.lastKeyTime=0,this.lastTouchTime=0,this.lastFocusTime=0,this.lastScrollTop=0,this.lastScrollLeft=0,this.pendingIOSKey=void 0,this.tabFocusMode=-1,this.lastSelectionOrigin=null,this.lastSelectionTime=0,this.lastContextMenu=0,this.scrollHandlers=[],this.handlers=Object.create(null),this.composing=-1,this.compositionFirstChange=null,this.compositionEndedAt=0,this.compositionPendingKey=!1,this.compositionPendingChange=!1,this.insertingText="",this.insertingTextAt=0,this.mouseSelection=null,this.draggedContent=null,this.handleEvent=this.handleEvent.bind(this),this.notifiedFocused=e.hasFocus,D.safari&&e.contentDOM.addEventListener("input",()=>null),D.gecko&&wd(e.contentDOM.ownerDocument)}handleEvent(e){!ud(this.view,e)||this.ignoreDuringComposition(e)||e.type=="keydown"&&this.keydown(e)||(this.view.updateState!=0?Promise.resolve().then(()=>this.runHandlers(e.type,e)):this.runHandlers(e.type,e))}runHandlers(e,t){let i=this.handlers[e];if(i){for(let s of i.observers)s(this.view,t);for(let s of i.handlers){if(t.defaultPrevented)break;if(s(this.view,t)){t.preventDefault();break}}}}ensureHandlers(e){let t=od(e),i=this.handlers,s=this.view.contentDOM;for(let r in t)if(r!="scroll"){let o=!t[r].handlers.length,l=i[r];l&&o!=!l.handlers.length&&(s.removeEventListener(r,this.handleEvent),l=null),l||s.addEventListener(r,this.handleEvent,{passive:o})}for(let r in i)r!="scroll"&&!t[r]&&s.removeEventListener(r,this.handleEvent);this.handlers=t}keydown(e){if(this.lastKeyCode=e.keyCode,this.lastKeyTime=Date.now(),e.keyCode==9&&this.tabFocusMode>-1&&(!this.tabFocusMode||Date.now()<=this.tabFocusMode))return!0;if(this.tabFocusMode>0&&e.keyCode!=27&&Dh.indexOf(e.keyCode)<0&&(this.tabFocusMode=-1),D.android&&D.chrome&&!e.synthetic&&(e.keyCode==13||e.keyCode==8))return this.view.observer.delayAndroidKey(e.key,e.keyCode),!0;let t;return 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n==e?n:(n.constructor!=e.constructor&&(ni=!0),e)}Ce.prototype.size=1;var Gn=class extends Ce{constructor(e,t,i){super(e,t),this.deco=i}blockAt(e,t,i,s){return new Ye(s,this.length,i,this.height,this.deco||0)}lineAt(e,t,i,s,r){return this.blockAt(0,i,s,r)}forEachLine(e,t,i,s,r,o){e<=r+this.length&&t>=r&&o(this.blockAt(0,i,s,r))}updateHeight(e,t=0,i=!1,s){return s&&s.from<=t&&s.more&&this.setHeight(s.heights[s.index++]),this.outdated=!1,this}toString(){return`block(${this.length})`}},Le=class n extends Gn{constructor(e,t){super(e,t,null),this.collapsed=0,this.widgetHeight=0,this.breaks=0}blockAt(e,t,i,s){return new Ye(s,this.length,i,this.height,this.breaks)}replace(e,t,i){let s=i[0];return i.length==1&&(s instanceof n||s instanceof ut&&s.flags&4)&&Math.abs(this.length-s.length)<10?(s instanceof ut?s=new n(s.length,this.height):s.height=this.height,this.outdated||(s.outdated=!1),s):Ce.of(i)}updateHeight(e,t=0,i=!1,s){return s&&s.from<=t&&s.more?this.setHeight(s.heights[s.index++]):(i||this.outdated)&&this.setHeight(Math.max(this.widgetHeight,e.heightForLine(this.length-this.collapsed))+this.breaks*e.lineHeight),this.outdated=!1,this}toString(){return`line(${this.length}${this.collapsed?-this.collapsed:""}${this.widgetHeight?":"+this.widgetHeight:""})`}},ut=class n extends Ce{constructor(e){super(e,0)}heightMetrics(e,t){let i=e.doc.lineAt(t).number,s=e.doc.lineAt(t+this.length).number,r=s-i+1,o,l=0;if(e.lineWrapping){let a=Math.min(this.height,e.lineHeight*r);o=a/r,this.length>r+1&&(l=(this.height-a)/(this.length-r-1))}else o=this.height/r;return{firstLine:i,lastLine:s,perLine:o,perChar:l}}blockAt(e,t,i,s){let{firstLine:r,lastLine:o,perLine:l,perChar:a}=this.heightMetrics(t,s);if(t.lineWrapping){let f=s+(e<t.lineHeight?0:Math.round(Math.max(0,Math.min(1,(e-i)/this.height))*this.length)),h=t.doc.lineAt(f),c=l+h.length*a,u=Math.max(i,e-c/2);return new Ye(h.from,h.length,u,c,0)}else{let f=Math.max(0,Math.min(o-r,Math.floor((e-i)/l))),{from:h,length:c}=t.doc.line(r+f);return new Ye(h,c,i+l*f,l,0)}}lineAt(e,t,i,s,r){if(t==Y.ByHeight)return this.blockAt(e,i,s,r);if(t==Y.ByPosNoHeight){let{from:d,to:p}=i.doc.lineAt(e);return new Ye(d,p-d,0,0,0)}let{firstLine:o,perLine:l,perChar:a}=this.heightMetrics(i,r),f=i.doc.lineAt(e),h=l+f.length*a,c=f.number-o,u=s+l*c+a*(f.from-r-c);return new Ye(f.from,f.length,Math.max(s,Math.min(u,s+this.height-h)),h,0)}forEachLine(e,t,i,s,r,o){e=Math.max(e,r),t=Math.min(t,r+this.length);let{firstLine:l,perLine:a,perChar:f}=this.heightMetrics(i,r);for(let h=e,c=s;h<=t;){let u=i.doc.lineAt(h);if(h==e){let p=u.number-l;c+=a*p+f*(e-r-p)}let d=a+f*u.length;o(new Ye(u.from,u.length,c,d,0)),c+=d,h=u.to+1}}replace(e,t,i){let s=this.length-t;if(s>0){let r=i[i.length-1];r instanceof n?i[i.length-1]=new n(r.length+s):i.push(null,new n(s-1))}if(e>0){let r=i[0];r instanceof n?i[0]=new n(e+r.length):i.unshift(new n(e-1),null)}return Ce.of(i)}decomposeLeft(e,t){t.push(new n(e-1),null)}decomposeRight(e,t){t.push(null,new n(this.length-e-1))}updateHeight(e,t=0,i=!1,s){let r=t+this.length;if(s&&s.from<=t+this.length&&s.more){let o=[],l=Math.max(t,s.from),a=-1;for(s.from>t&&o.push(new n(s.from-t-1).updateHeight(e,t));l<=r&&s.more;){let h=e.doc.lineAt(l).length;o.length&&o.push(null);let c=s.heights[s.index++];a==-1?a=c:Math.abs(c-a)>=Nn&&(a=-2);let u=new Le(h,c);u.outdated=!1,o.push(u),l+=h+1}l<=r&&o.push(null,new n(r-l).updateHeight(e,l));let f=Ce.of(o);return(a<0||Math.abs(f.height-this.height)>=Nn||Math.abs(a-this.heightMetrics(e,t).perLine)>=Nn)&&(ni=!0),Un(this,f)}else(i||this.outdated)&&(this.setHeight(e.heightForGap(t,t+this.length)),this.outdated=!1);return this}toString(){return`gap(${this.length})`}},Hr=class extends Ce{constructor(e,t,i){super(e.length+t+i.length,e.height+i.height,t|(e.outdated||i.outdated?2:0)),this.left=e,this.right=i,this.size=e.size+i.size}get break(){return this.flags&1}blockAt(e,t,i,s){let r=i+this.left.height;return e<r?this.left.blockAt(e,t,i,s):this.right.blockAt(e,t,r,s+this.left.length+this.break)}lineAt(e,t,i,s,r){let o=s+this.left.height,l=r+this.left.length+this.break,a=t==Y.ByHeight?e<o:e<l,f=a?this.left.lineAt(e,t,i,s,r):this.right.lineAt(e,t,i,o,l);if(this.break||(a?f.to<l:f.from>l))return f;let h=t==Y.ByPosNoHeight?Y.ByPosNoHeight:Y.ByPos;return a?f.join(this.right.lineAt(l,h,i,o,l)):this.left.lineAt(l,h,i,s,r).join(f)}forEachLine(e,t,i,s,r,o){let l=s+this.left.height,a=r+this.left.length+this.break;if(this.break)e<a&&this.left.forEachLine(e,t,i,s,r,o),t>=a&&this.right.forEachLine(e,t,i,l,a,o);else{let f=this.lineAt(a,Y.ByPos,i,s,r);e<f.from&&this.left.forEachLine(e,f.from-1,i,s,r,o),f.to>=e&&f.from<=t&&o(f),t>f.to&&this.right.forEachLine(f.to+1,t,i,l,a,o)}}replace(e,t,i){let s=this.left.length+this.break;if(t<s)return this.balanced(this.left.replace(e,t,i),this.right);if(e>this.left.length)return this.balanced(this.left,this.right.replace(e-s,t-s,i));let r=[];e>0&&this.decomposeLeft(e,r);let o=r.length;for(let l of i)r.push(l);if(e>0&&Aa(r,o-1),t<this.length){let l=r.length;this.decomposeRight(t,r),Aa(r,l)}return Ce.of(r)}decomposeLeft(e,t){let i=this.left.length;if(e<=i)return this.left.decomposeLeft(e,t);t.push(this.left),this.break&&(i++,e>=i&&t.push(null)),e>i&&this.right.decomposeLeft(e-i,t)}decomposeRight(e,t){let i=this.left.length,s=i+this.break;if(e>=s)return this.right.decomposeRight(e-s,t);e<i&&this.left.decomposeRight(e,t),this.break&&e<s&&t.push(null),t.push(this.right)}balanced(e,t){return e.size>2*t.size||t.size>2*e.size?Ce.of(this.break?[e,null,t]:[e,t]):(this.left=Un(this.left,e),this.right=Un(this.right,t),this.setHeight(e.height+t.height),this.outdated=e.outdated||t.outdated,this.size=e.size+t.size,this.length=e.length+this.break+t.length,this)}updateHeight(e,t=0,i=!1,s){let{left:r,right:o}=this,l=t+r.length+this.break,a=null;return s&&s.from<=t+r.length&&s.more?a=r=r.updateHeight(e,t,i,s):r.updateHeight(e,t,i),s&&s.from<=l+o.length&&s.more?a=o=o.updateHeight(e,l,i,s):o.updateHeight(e,l,i),a?this.balanced(r,o):(this.height=this.left.height+this.right.height,this.outdated=!1,this)}toString(){return this.left+(this.break?" ":"-")+this.right}};function Aa(n,e){let t,i;n[e]==null&&(t=n[e-1])instanceof ut&&(i=n[e+1])instanceof ut&&n.splice(e-1,3,new ut(t.length+1+i.length))}var vd=5,Vr=class n{constructor(e,t){this.pos=e,this.oracle=t,this.nodes=[],this.lineStart=-1,this.lineEnd=-1,this.covering=null,this.writtenTo=e}get isCovered(){return this.covering&&this.nodes[this.nodes.length-1]==this.covering}span(e,t){if(this.lineStart>-1){let i=Math.min(t,this.lineEnd),s=this.nodes[this.nodes.length-1];s instanceof Le?s.length+=i-this.pos:(i>this.pos||!this.isCovered)&&this.nodes.push(new Le(i-this.pos,-1)),this.writtenTo=i,t>i&&(this.nodes.push(null),this.writtenTo++,this.lineStart=-1)}this.pos=t}point(e,t,i){if(e<t||i.heightRelevant){let s=i.widget?i.widget.estimatedHeight:0,r=i.widget?i.widget.lineBreaks:0;s<0&&(s=this.oracle.lineHeight);let o=t-e;i.block?this.addBlock(new Gn(o,s,i)):(o||r||s>=vd)&&this.addLineDeco(s,r,o)}else t>e&&this.span(e,t);this.lineEnd>-1&&this.lineEnd<this.pos&&(this.lineEnd=this.oracle.doc.lineAt(this.pos).to)}enterLine(){if(this.lineStart>-1)return;let{from:e,to:t}=this.oracle.doc.lineAt(this.pos);this.lineStart=e,this.lineEnd=t,this.writtenTo<e&&((this.writtenTo<e-1||this.nodes[this.nodes.length-1]==null)&&this.nodes.push(this.blankContent(this.writtenTo,e-1)),this.nodes.push(null)),this.pos>e&&this.nodes.push(new Le(this.pos-e,-1)),this.writtenTo=this.pos}blankContent(e,t){let i=new ut(t-e);return this.oracle.doc.lineAt(e).to==t&&(i.flags|=4),i}ensureLine(){this.enterLine();let e=this.nodes.length?this.nodes[this.nodes.length-1]:null;if(e instanceof Le)return e;let t=new Le(0,-1);return this.nodes.push(t),t}addBlock(e){this.enterLine();let t=e.deco;t&&t.startSide>0&&!this.isCovered&&this.ensureLine(),this.nodes.push(e),this.writtenTo=this.pos=this.pos+e.length,t&&t.endSide>0&&(this.covering=e)}addLineDeco(e,t,i){let s=this.ensureLine();s.length+=i,s.collapsed+=i,s.widgetHeight=Math.max(s.widgetHeight,e),s.breaks+=t,this.writtenTo=this.pos=this.pos+i}finish(e){let t=this.nodes.length==0?null:this.nodes[this.nodes.length-1];this.lineStart>-1&&!(t instanceof Le)&&!this.isCovered?this.nodes.push(new Le(0,-1)):(this.writtenTo<this.pos||t==null)&&this.nodes.push(this.blankContent(this.writtenTo,this.pos));let i=e;for(let s of this.nodes)s instanceof Le&&s.updateHeight(this.oracle,i),i+=s?s.length:1;return this.nodes}static build(e,t,i,s){let r=new n(i,e);return W.spans(t,i,s,r,0),r.finish(i)}};function kd(n,e,t){let i=new Wr;return W.compare(n,e,t,i,0),i.changes}var Wr=class{constructor(){this.changes=[]}compareRange(){}comparePoint(e,t,i,s){(e<t||i&&i.heightRelevant||s&&s.heightRelevant)&&In(e,t,this.changes,5)}};function Sd(n,e){let t=n.getBoundingClientRect(),i=n.ownerDocument,s=i.defaultView||window,r=Math.max(0,t.left),o=Math.min(s.innerWidth,t.right),l=Math.max(0,t.top),a=Math.min(s.innerHeight,t.bottom);for(let f=n.parentNode;f&&f!=i.body;)if(f.nodeType==1){let h=f,c=window.getComputedStyle(h);if((h.scrollHeight>h.clientHeight||h.scrollWidth>h.clientWidth)&&c.overflow!="visible"){let u=h.getBoundingClientRect();r=Math.max(r,u.left),o=Math.min(o,u.right),l=Math.max(l,u.top),a=Math.min(f==n.parentNode?s.innerHeight:a,u.bottom)}f=c.position=="absolute"||c.position=="fixed"?h.offsetParent:h.parentNode}else if(f.nodeType==11)f=f.host;else break;return{left:r-t.left,right:Math.max(r,o)-t.left,top:l-(t.top+e),bottom:Math.max(l,a)-(t.top+e)}}function Cd(n){let e=n.getBoundingClientRect(),t=n.ownerDocument.defaultView||window;return e.left<t.innerWidth&&e.right>0&&e.top<t.innerHeight&&e.bottom>0}function Ad(n,e){let t=n.getBoundingClientRect();return{left:0,right:t.right-t.left,top:e,bottom:t.bottom-(t.top+e)}}var Ti=class{constructor(e,t,i,s){this.from=e,this.to=t,this.size=i,this.displaySize=s}static same(e,t){if(e.length!=t.length)return!1;for(let i=0;i<e.length;i++){let s=e[i],r=t[i];if(s.from!=r.from||s.to!=r.to||s.size!=r.size)return!1}return!0}draw(e,t){return B.replace({widget:new zr(this.displaySize*(t?e.scaleY:e.scaleX),t)}).range(this.from,this.to)}},zr=class extends Ae{constructor(e,t){super(),this.size=e,this.vertical=t}eq(e){return e.size==this.size&&e.vertical==this.vertical}toDOM(){let e=document.createElement("div");return this.vertical?e.style.height=this.size+"px":(e.style.width=this.size+"px",e.style.height="2px",e.style.display="inline-block"),e}get estimatedHeight(){return this.vertical?this.size:-1}},_n=class{constructor(e){this.state=e,this.pixelViewport={left:0,right:window.innerWidth,top:0,bottom:0},this.inView=!0,this.paddingTop=0,this.paddingBottom=0,this.contentDOMWidth=0,this.contentDOMHeight=0,this.editorHeight=0,this.editorWidth=0,this.scrollTop=0,this.scrolledToBottom=!1,this.scaleX=1,this.scaleY=1,this.scrollAnchorPos=0,this.scrollAnchorHeight=-1,this.scaler=Ma,this.scrollTarget=null,this.printing=!1,this.mustMeasureContent=!0,this.defaultTextDirection=K.LTR,this.visibleRanges=[],this.mustEnforceCursorAssoc=!1;let t=e.facet(ho).some(i=>typeof i!="function"&&i.class=="cm-lineWrapping");this.heightOracle=new Nr(t),this.stateDeco=e.facet(Ni).filter(i=>typeof i!="function"),this.heightMap=Ce.empty().applyChanges(this.stateDeco,N.empty,this.heightOracle.setDoc(e.doc),[new Xe(0,0,0,e.doc.length)]);for(let i=0;i<2&&(this.viewport=this.getViewport(0,null),!!this.updateForViewport());i++);this.updateViewportLines(),this.lineGaps=this.ensureLineGaps([]),this.lineGapDeco=B.set(this.lineGaps.map(i=>i.draw(this,!1))),this.computeVisibleRanges()}updateForViewport(){let e=[this.viewport],{main:t}=this.state.selection;for(let i=0;i<=1;i++){let s=i?t.head:t.anchor;if(!e.some(({from:r,to:o})=>s>=r&&s<=o)){let{from:r,to:o}=this.lineBlockAt(s);e.push(new Qt(r,o))}}return this.viewports=e.sort((i,s)=>i.from-s.from),this.updateScaler()}updateScaler(){let e=this.scaler;return this.scaler=this.heightMap.height<=7e6?Ma:new qr(this.heightOracle,this.heightMap,this.viewports),e.eq(this.scaler)?0:2}updateViewportLines(){this.viewportLines=[],this.heightMap.forEachLine(this.viewport.from,this.viewport.to,this.heightOracle.setDoc(this.state.doc),0,0,e=>{this.viewportLines.push(wi(e,this.scaler))})}update(e,t=null){this.state=e.state;let i=this.stateDeco;this.stateDeco=this.state.facet(Ni).filter(h=>typeof h!="function");let s=e.changedRanges,r=Xe.extendWithRanges(s,kd(i,this.stateDeco,e?e.changes:pe.empty(this.state.doc.length))),o=this.heightMap.height,l=this.scrolledToBottom?null:this.scrollAnchorAt(this.scrollTop);Ca(),this.heightMap=this.heightMap.applyChanges(this.stateDeco,e.startState.doc,this.heightOracle.setDoc(this.state.doc),r),(this.heightMap.height!=o||ni)&&(e.flags|=2),l?(this.scrollAnchorPos=e.changes.mapPos(l.from,-1),this.scrollAnchorHeight=l.top):(this.scrollAnchorPos=-1,this.scrollAnchorHeight=o);let a=r.length?this.mapViewport(this.viewport,e.changes):this.viewport;(t&&(t.range.head<a.from||t.range.head>a.to)||!this.viewportIsAppropriate(a))&&(a=this.getViewport(0,t));let f=a.from!=this.viewport.from||a.to!=this.viewport.to;this.viewport=a,e.flags|=this.updateForViewport(),(f||!e.changes.empty||e.flags&2)&&this.updateViewportLines(),(this.lineGaps.length||this.viewport.to-this.viewport.from>4e3)&&this.updateLineGaps(this.ensureLineGaps(this.mapLineGaps(this.lineGaps,e.changes))),e.flags|=this.computeVisibleRanges(e.changes),t&&(this.scrollTarget=t),!this.mustEnforceCursorAssoc&&e.selectionSet&&e.view.lineWrapping&&e.state.selection.main.empty&&e.state.selection.main.assoc&&!e.state.facet(ph)&&(this.mustEnforceCursorAssoc=!0)}measure(e){let t=e.contentDOM,i=window.getComputedStyle(t),s=this.heightOracle,r=i.whiteSpace;this.defaultTextDirection=i.direction=="rtl"?K.RTL:K.LTR;let o=this.heightOracle.mustRefreshForWrapping(r),l=t.getBoundingClientRect(),a=o||this.mustMeasureContent||this.contentDOMHeight!=l.height;this.contentDOMHeight=l.height,this.mustMeasureContent=!1;let f=0,h=0;if(l.width&&l.height){let{scaleX:k,scaleY:v}=$a(t,l);(k>.005&&Math.abs(this.scaleX-k)>.005||v>.005&&Math.abs(this.scaleY-v)>.005)&&(this.scaleX=k,this.scaleY=v,f|=16,o=a=!0)}let c=(parseInt(i.paddingTop)||0)*this.scaleY,u=(parseInt(i.paddingBottom)||0)*this.scaleY;(this.paddingTop!=c||this.paddingBottom!=u)&&(this.paddingTop=c,this.paddingBottom=u,f|=18),this.editorWidth!=e.scrollDOM.clientWidth&&(s.lineWrapping&&(a=!0),this.editorWidth=e.scrollDOM.clientWidth,f|=16);let d=e.scrollDOM.scrollTop*this.scaleY;this.scrollTop!=d&&(this.scrollAnchorHeight=-1,this.scrollTop=d),this.scrolledToBottom=Ga(e.scrollDOM);let p=(this.printing?Ad:Sd)(t,this.paddingTop),m=p.top-this.pixelViewport.top,g=p.bottom-this.pixelViewport.bottom;this.pixelViewport=p;let y=this.pixelViewport.bottom>this.pixelViewport.top&&this.pixelViewport.right>this.pixelViewport.left;if(y!=this.inView&&(this.inView=y,y&&(a=!0)),!this.inView&&!this.scrollTarget&&!Cd(e.dom))return 0;let x=l.width;if((this.contentDOMWidth!=x||this.editorHeight!=e.scrollDOM.clientHeight)&&(this.contentDOMWidth=l.width,this.editorHeight=e.scrollDOM.clientHeight,f|=16),a){let k=e.docView.measureVisibleLineHeights(this.viewport);if(s.mustRefreshForHeights(k)&&(o=!0),o||s.lineWrapping&&Math.abs(x-this.contentDOMWidth)>s.charWidth){let{lineHeight:v,charWidth:S,textHeight:A}=e.docView.measureTextSize();o=v>0&&s.refresh(r,v,S,A,Math.max(5,x/S),k),o&&(e.docView.minWidth=0,f|=16)}m>0&&g>0?h=Math.max(m,g):m<0&&g<0&&(h=Math.min(m,g)),Ca();for(let v of this.viewports){let S=v.from==this.viewport.from?k:e.docView.measureVisibleLineHeights(v);this.heightMap=(o?Ce.empty().applyChanges(this.stateDeco,N.empty,this.heightOracle,[new Xe(0,0,0,e.state.doc.length)]):this.heightMap).updateHeight(s,0,o,new Fr(v.from,S))}ni&&(f|=2)}let w=!this.viewportIsAppropriate(this.viewport,h)||this.scrollTarget&&(this.scrollTarget.range.head<this.viewport.from||this.scrollTarget.range.head>this.viewport.to);return 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s&&!this.selectionChanged&&e.inputState.lastFocusTime>Date.now()-200&&e.inputState.lastTouchTime<Date.now()-300&&Su(this.dom,i)?(this.view.inputState.lastFocusTime=0,e.docView.updateSelection(),!1):(this.selectionRange.setRange(i),s&&(this.selectionChanged=!0),!0)}setSelectionRange(e,t){this.selectionRange.set(e.node,e.offset,t.node,t.offset),this.selectionChanged=!1}clearSelectionRange(){this.selectionRange.set(null,0,null,0)}listenForScroll(){this.parentCheck=-1;let e=0,t=null;for(let i=this.dom;i;)if(i.nodeType==1)!t&&e<this.scrollTargets.length&&this.scrollTargets[e]==i?e++:t||(t=this.scrollTargets.slice(0,e)),t&&t.push(i),i=i.assignedSlot||i.parentNode;else if(i.nodeType==11)i=i.host;else break;if(e<this.scrollTargets.length&&!t&&(t=this.scrollTargets.slice(0,e)),t){for(let i of this.scrollTargets)i.removeEventListener("scroll",this.onScroll);for(let i of this.scrollTargets=t)i.addEventListener("scroll",this.onScroll)}}ignore(e){if(!this.active)return e();try{return this.stop(),e()}finally{this.start(),this.clear()}}start(){this.active||(this.observer.observe(this.dom,Od),dr&&this.dom.addEventListener("DOMCharacterDataModified",this.onCharData),this.active=!0)}stop(){this.active&&(this.active=!1,this.observer.disconnect(),dr&&this.dom.removeEventListener("DOMCharacterDataModified",this.onCharData))}clear(){this.processRecords(),this.queue.length=0,this.selectionChanged=!1}delayAndroidKey(e,t){var i;if(!this.delayedAndroidKey){let s=()=>{let r=this.delayedAndroidKey;r&&(this.clearDelayedAndroidKey(),this.view.inputState.lastKeyCode=r.keyCode,this.view.inputState.lastKeyTime=Date.now(),!this.flush()&&r.force&&ti(this.dom,r.key,r.keyCode))};this.flushingAndroidKey=this.view.win.requestAnimationFrame(s)}(!this.delayedAndroidKey||e=="Enter")&&(this.delayedAndroidKey={key:e,keyCode:t,force:this.lastChange<Date.now()-50||!!(!((i=this.delayedAndroidKey)===null||i===void 0)&&i.force)})}clearDelayedAndroidKey(){this.win.cancelAnimationFrame(this.flushingAndroidKey),this.delayedAndroidKey=null,this.flushingAndroidKey=-1}flushSoon(){this.delayedFlush<0&&(this.delayedFlush=this.view.win.requestAnimationFrame(()=>{this.delayedFlush=-1,this.flush()}))}forceFlush(){this.delayedFlush>=0&&(this.view.win.cancelAnimationFrame(this.delayedFlush),this.delayedFlush=-1),this.flush()}pendingRecords(){for(let e of this.observer.takeRecords())this.queue.push(e);return this.queue}processRecords(){let e=this.pendingRecords();e.length&&(this.queue=[]);let t=-1,i=-1,s=!1;for(let r of e){let o=this.readMutation(r);o&&(o.typeOver&&(s=!0),t==-1?{from:t,to:i}=o:(t=Math.min(o.from,t),i=Math.max(o.to,i)))}return{from:t,to:i,typeOver:s}}readChange(){let{from:e,to:t,typeOver:i}=this.processRecords(),s=this.selectionChanged&&Rn(this.dom,this.selectionRange);if(e<0&&!s)return null;e>-1&&(this.lastChange=Date.now()),this.view.inputState.lastFocusTime=0,this.selectionChanged=!1;let r=new Pr(this.view,e,t,i);return this.view.docView.domChanged={newSel:r.newSel?r.newSel.main:null},r}flush(e=!0){if(this.delayedFlush>=0||this.delayedAndroidKey)return!1;e&&this.readSelectionRange();let t=this.readChange();if(!t)return this.view.requestMeasure(),!1;let i=this.view.state,s=Ah(this.view,t);return this.view.state==i&&(t.domChanged||t.newSel&&!t.newSel.main.eq(this.view.state.selection.main))&&this.view.update([]),s}readMutation(e){let t=this.view.docView.nearest(e.target);if(!t||t.ignoreMutation(e))return null;if(t.markDirty(e.type=="attributes"),e.type=="attributes"&&(t.flags|=4),e.type=="childList"){let i=Ta(t,e.previousSibling||e.target.previousSibling,-1),s=Ta(t,e.nextSibling||e.target.nextSibling,1);return{from:i?t.posAfter(i):t.posAtStart,to:s?t.posBefore(s):t.posAtEnd,typeOver:!1}}else return e.type=="characterData"?{from:t.posAtStart,to:t.posAtEnd,typeOver:e.target.nodeValue==e.oldValue}:null}setWindow(e){e!=this.win&&(this.removeWindowListeners(this.win),this.win=e,this.addWindowListeners(this.win))}addWindowListeners(e){e.addEventListener("resize",this.onResize),this.printQuery?this.printQuery.addEventListener?this.printQuery.addEventListener("change",this.onPrint):this.printQuery.addListener(this.onPrint):e.addEventListener("beforeprint",this.onPrint),e.addEventListener("scroll",this.onScroll),e.document.addEventListener("selectionchange",this.onSelectionChange)}removeWindowListeners(e){e.removeEventListener("scroll",this.onScroll),e.removeEventListener("resize",this.onResize),this.printQuery?this.printQuery.removeEventListener?this.printQuery.removeEventListener("change",this.onPrint):this.printQuery.removeListener(this.onPrint):e.removeEventListener("beforeprint",this.onPrint),e.document.removeEventListener("selectionchange",this.onSelectionChange)}update(e){this.editContext&&(this.editContext.update(e),e.startState.facet(at)!=e.state.facet(at)&&(e.view.contentDOM.editContext=e.state.facet(at)?this.editContext.editContext:null))}destroy(){var e,t,i;this.stop(),(e=this.intersection)===null||e===void 0||e.disconnect(),(t=this.gapIntersection)===null||t===void 0||t.disconnect(),(i=this.resizeScroll)===null||i===void 0||i.disconnect();for(let s of this.scrollTargets)s.removeEventListener("scroll",this.onScroll);this.removeWindowListeners(this.win),clearTimeout(this.parentCheck),clearTimeout(this.resizeTimeout),this.win.cancelAnimationFrame(this.delayedFlush),this.win.cancelAnimationFrame(this.flushingAndroidKey),this.editContext&&(this.view.contentDOM.editContext=null,this.editContext.destroy())}};function Ta(n,e,t){for(;e;){let i=G.get(e);if(i&&i.parent==n)return i;let s=e.parentNode;e=s!=n.dom?s:t>0?e.nextSibling:e.previousSibling}return null}function Da(n,e){let t=e.startContainer,i=e.startOffset,s=e.endContainer,r=e.endOffset,o=n.docView.domAtPos(n.state.selection.main.anchor);return ki(o.node,o.offset,s,r)&&([t,i,s,r]=[s,r,t,i]),{anchorNode:t,anchorOffset:i,focusNode:s,focusOffset:r}}function Bd(n,e){if(e.getComposedRanges){let s=e.getComposedRanges(n.root)[0];if(s)return Da(n,s)}let t=null;function i(s){s.preventDefault(),s.stopImmediatePropagation(),t=s.getTargetRanges()[0]}return n.contentDOM.addEventListener("beforeinput",i,!0),n.dom.ownerDocument.execCommand("indent"),n.contentDOM.removeEventListener("beforeinput",i,!0),t?Da(n,t):null}var Gr=class{constructor(e){this.from=0,this.to=0,this.pendingContextChange=null,this.handlers=Object.create(null),this.composing=null,this.resetRange(e.state);let t=this.editContext=new window.EditContext({text:e.state.doc.sliceString(this.from,this.to),selectionStart:this.toContextPos(Math.max(this.from,Math.min(this.to,e.state.selection.main.anchor))),selectionEnd:this.toContextPos(e.state.selection.main.head)});this.handlers.textupdate=i=>{let s=e.state.selection.main,{anchor:r,head:o}=s,l=this.toEditorPos(i.updateRangeStart),a=this.toEditorPos(i.updateRangeEnd);e.inputState.composing>=0&&!this.composing&&(this.composing={contextBase:i.updateRangeStart,editorBase:l,drifted:!1});let f=a-l>i.text.length;l==this.from&&r<this.from?l=r:a==this.to&&r>this.to&&(a=r);let h=Mh(e.state.sliceDoc(l,a),i.text,(f?s.from:s.to)-l,f?"end":null);if(!h){let u=b.single(this.toEditorPos(i.selectionStart),this.toEditorPos(i.selectionEnd));u.main.eq(s)||e.dispatch({selection:u,userEvent:"select"});return}let c={from:h.from+l,to:h.toA+l,insert:N.of(i.text.slice(h.from,h.toB).split(`
+`))};if((D.mac||D.android)&&c.from==o-1&&/^\. ?$/.test(i.text)&&e.contentDOM.getAttribute("autocorrect")=="off"&&(c={from:l,to:a,insert:N.of([i.text.replace("."," ")])}),this.pendingContextChange=c,!e.state.readOnly){let u=this.to-this.from+(c.to-c.from+c.insert.length);co(e,c,b.single(this.toEditorPos(i.selectionStart,u),this.toEditorPos(i.selectionEnd,u)))}this.pendingContextChange&&(this.revertPending(e.state),this.setSelection(e.state)),c.from<c.to&&!c.insert.length&&e.inputState.composing>=0&&!/[\\p{Alphabetic}\\p{Number}_]/.test(t.text.slice(Math.max(0,i.updateRangeStart-1),Math.min(t.text.length,i.updateRangeStart+1)))&&this.handlers.compositionend(i)},this.handlers.characterboundsupdate=i=>{let s=[],r=null;for(let o=this.toEditorPos(i.rangeStart),l=this.toEditorPos(i.rangeEnd);o<l;o++){let a=e.coordsForChar(o);r=a&&new DOMRect(a.left,a.top,a.right-a.left,a.bottom-a.top)||r||new DOMRect,s.push(r)}t.updateCharacterBounds(i.rangeStart,s)},this.handlers.textformatupdate=i=>{let s=[];for(let r of i.getTextFormats()){let o=r.underlineStyle,l=r.underlineThickness;if(!/none/i.test(o)&&!/none/i.test(l)){let a=this.toEditorPos(r.rangeStart),f=this.toEditorPos(r.rangeEnd);if(a<f){let h=`text-decoration: underline ${/^[a-z]/.test(o)?o+" ":o=="Dashed"?"dashed ":o=="Squiggle"?"wavy ":""}${/thin/i.test(l)?1:2}px`;s.push(B.mark({attributes:{style:h}}).range(a,f))}}}e.dispatch({effects:gh.of(B.set(s))})},this.handlers.compositionstart=()=>{e.inputState.composing<0&&(e.inputState.composing=0,e.inputState.compositionFirstChange=!0)},this.handlers.compositionend=()=>{if(e.inputState.composing=-1,e.inputState.compositionFirstChange=null,this.composing){let{drifted:i}=this.composing;this.composing=null,i&&this.reset(e.state)}};for(let i in this.handlers)t.addEventListener(i,this.handlers[i]);this.measureReq={read:i=>{this.editContext.updateControlBounds(i.contentDOM.getBoundingClientRect());let s=Bi(i.root);s&&s.rangeCount&&this.editContext.updateSelectionBounds(s.getRangeAt(0).getBoundingClientRect())}}}applyEdits(e){let t=0,i=!1,s=this.pendingContextChange;return e.changes.iterChanges((r,o,l,a,f)=>{if(i)return;let h=f.length-(o-r);if(s&&o>=s.to)if(s.from==r&&s.to==o&&s.insert.eq(f)){s=this.pendingContextChange=null,t+=h,this.to+=h;return}else s=null,this.revertPending(e.state);if(r+=t,o+=t,o<=this.from)this.from+=h,this.to+=h;else if(r<this.to){if(r<this.from||o>this.to||this.to-this.from+f.length>3e4){i=!0;return}this.editContext.updateText(this.toContextPos(r),this.toContextPos(o),f.toString()),this.to+=h}t+=h}),s&&!i&&this.revertPending(e.state),!i}update(e){let t=this.pendingContextChange,i=e.startState.selection.main;this.composing&&(this.composing.drifted||!e.changes.touchesRange(i.from,i.to)&&e.transactions.some(s=>!s.isUserEvent("input.type")&&s.changes.touchesRange(this.from,this.to)))?(this.composing.drifted=!0,this.composing.editorBase=e.changes.mapPos(this.composing.editorBase)):!this.applyEdits(e)||!this.rangeIsValid(e.state)?(this.pendingContextChange=null,this.reset(e.state)):(e.docChanged||e.selectionSet||t)&&this.setSelection(e.state),(e.geometryChanged||e.docChanged||e.selectionSet)&&e.view.requestMeasure(this.measureReq)}resetRange(e){let{head:t}=e.selection.main;this.from=Math.max(0,t-1e4),this.to=Math.min(e.doc.length,t+1e4)}reset(e){this.resetRange(e),this.editContext.updateText(0,this.editContext.text.length,e.doc.sliceString(this.from,this.to)),this.setSelection(e)}revertPending(e){let t=this.pendingContextChange;this.pendingContextChange=null,this.editContext.updateText(this.toContextPos(t.from),this.toContextPos(t.from+t.insert.length),e.doc.sliceString(t.from,t.to))}setSelection(e){let{main:t}=e.selection,i=this.toContextPos(Math.max(this.from,Math.min(this.to,t.anchor))),s=this.toContextPos(t.head);(this.editContext.selectionStart!=i||this.editContext.selectionEnd!=s)&&this.editContext.updateSelection(i,s)}rangeIsValid(e){let{head:t}=e.selection.main;return!(this.from>0&&t-this.from<500||this.to<e.doc.length&&this.to-t<500||this.to-this.from>1e4*3)}toEditorPos(e,t=this.to-this.from){e=Math.min(e,t);let i=this.composing;return i&&i.drifted?i.editorBase+(e-i.contextBase):e+this.from}toContextPos(e){let t=this.composing;return t&&t.drifted?t.contextBase+(e-t.editorBase):e-this.from}destroy(){for(let e in this.handlers)this.editContext.removeEventListener(e,this.handlers[e])}},O=class n{get state(){return this.viewState.state}get viewport(){return this.viewState.viewport}get visibleRanges(){return this.viewState.visibleRanges}get inView(){return this.viewState.inView}get composing(){return!!this.inputState&&this.inputState.composing>0}get compositionStarted(){return!!this.inputState&&this.inputState.composing>=0}get root(){return this._root}get win(){return this.dom.ownerDocument.defaultView||window}constructor(e={}){var t;this.plugins=[],this.pluginMap=new Map,this.editorAttrs={},this.contentAttrs={},this.bidiCache=[],this.destroyed=!1,this.updateState=2,this.measureScheduled=-1,this.measureRequests=[],this.contentDOM=document.createElement("div"),this.scrollDOM=document.createElement("div"),this.scrollDOM.tabIndex=-1,this.scrollDOM.className="cm-scroller",this.scrollDOM.appendChild(this.contentDOM),this.announceDOM=document.createElement("div"),this.announceDOM.className="cm-announced",this.announceDOM.setAttribute("aria-live","polite"),this.dom=document.createElement("div"),this.dom.appendChild(this.announceDOM),this.dom.appendChild(this.scrollDOM),e.parent&&e.parent.appendChild(this.dom);let{dispatch:i}=e;this.dispatchTransactions=e.dispatchTransactions||i&&(s=>s.forEach(r=>i(r,this)))||(s=>this.update(s)),this.dispatch=this.dispatch.bind(this),this._root=e.root||ku(e.parent)||document,this.viewState=new _n(e.state||j.create(e)),e.scrollTo&&e.scrollTo.is(An)&&(this.viewState.scrollTarget=e.scrollTo.value.clip(this.viewState.state)),this.plugins=this.state.facet(Xt).map(s=>new Ai(s));for(let s of this.plugins)s.update(this);this.observer=new Ur(this),this.inputState=new Lr(this),this.inputState.ensureHandlers(this.plugins),this.docView=new $n(this),this.mountStyles(),this.updateAttrs(),this.updateState=0,this.requestMeasure(),!((t=document.fonts)===null||t===void 0)&&t.ready&&document.fonts.ready.then(()=>this.requestMeasure())}dispatch(...e){let t=e.length==1&&e[0]instanceof ee?e:e.length==1&&Array.isArray(e[0])?e[0]:[this.state.update(...e)];this.dispatchTransactions(t,this)}update(e){if(this.updateState!=0)throw new Error("Calls to EditorView.update are not allowed while an update is in progress");let t=!1,i=!1,s,r=this.state;for(let u of e){if(u.startState!=r)throw new RangeError("Trying to update state with a transaction that doesn't start from the previous state.");r=u.state}if(this.destroyed){this.viewState.state=r;return}let o=this.hasFocus,l=0,a=null;e.some(u=>u.annotation(Ph))?(this.inputState.notifiedFocused=o,l=1):o!=this.inputState.notifiedFocused&&(this.inputState.notifiedFocused=o,a=Lh(r,o),a||(l=1));let f=this.observer.delayedAndroidKey,h=null;if(f?(this.observer.clearDelayedAndroidKey(),h=this.observer.readChange(),(h&&!this.state.doc.eq(r.doc)||!this.state.selection.eq(r.selection))&&(h=null)):this.observer.clear(),r.facet(j.phrases)!=this.state.facet(j.phrases))return this.setState(r);s=Kn.create(this,r,e),s.flags|=l;let c=this.viewState.scrollTarget;try{this.updateState=2;for(let u of e){if(c&&(c=c.map(u.changes)),u.scrollIntoView){let{main:d}=u.state.selection;c=new Ci(d.empty?d:b.cursor(d.head,d.head>d.anchor?-1:1))}for(let d of u.effects)d.is(An)&&(c=d.value.clip(this.state))}this.viewState.update(s,c),this.bidiCache=Yn.update(this.bidiCache,s.changes),s.empty||(this.updatePlugins(s),this.inputState.update(s)),t=this.docView.update(s),this.state.facet(bi)!=this.styleModules&&this.mountStyles(),i=this.updateAttrs(),this.showAnnouncements(e),this.docView.updateSelection(t,e.some(u=>u.isUserEvent("select.pointer")))}finally{this.updateState=0}if(s.startState.facet(Bn)!=s.state.facet(Bn)&&(this.viewState.mustMeasureContent=!0),(t||i||c||this.viewState.mustEnforceCursorAssoc||this.viewState.mustMeasureContent)&&this.requestMeasure(),t&&this.docViewUpdate(),!s.empty)for(let u of this.state.facet(Dr))try{u(s)}catch(d){ae(this.state,d,"update listener")}(a||h)&&Promise.resolve().then(()=>{a&&this.state==a.startState&&this.dispatch(a),h&&!Ah(this,h)&&f.force&&ti(this.contentDOM,f.key,f.keyCode)})}setState(e){if(this.updateState!=0)throw new Error("Calls to EditorView.setState are not allowed while an update is in progress");if(this.destroyed){this.viewState.state=e;return}this.updateState=2;let t=this.hasFocus;try{for(let i of this.plugins)i.destroy(this);this.viewState=new _n(e),this.plugins=e.facet(Xt).map(i=>new Ai(i)),this.pluginMap.clear();for(let i of this.plugins)i.update(this);this.docView.destroy(),this.docView=new $n(this),this.inputState.ensureHandlers(this.plugins),this.mountStyles(),this.updateAttrs(),this.bidiCache=[]}finally{this.updateState=0}t&&this.focus(),this.requestMeasure()}updatePlugins(e){let t=e.startState.facet(Xt),i=e.state.facet(Xt);if(t!=i){let s=[];for(let r of i){let o=t.indexOf(r);if(o<0)s.push(new Ai(r));else{let l=this.plugins[o];l.mustUpdate=e,s.push(l)}}for(let r of this.plugins)r.mustUpdate!=e&&r.destroy(this);this.plugins=s,this.pluginMap.clear()}else for(let s of this.plugins)s.mustUpdate=e;for(let s=0;s<this.plugins.length;s++)this.plugins[s].update(this);t!=i&&this.inputState.ensureHandlers(this.plugins)}docViewUpdate(){for(let e of this.plugins){let t=e.value;if(t&&t.docViewUpdate)try{t.docViewUpdate(this)}catch(i){ae(this.state,i,"doc view update listener")}}}measure(e=!0){if(this.destroyed)return;if(this.measureScheduled>-1&&this.win.cancelAnimationFrame(this.measureScheduled),this.observer.delayedAndroidKey){this.measureScheduled=-1,this.requestMeasure();return}this.measureScheduled=0,e&&this.observer.forceFlush();let t=null,i=this.scrollDOM,s=i.scrollTop*this.scaleY,{scrollAnchorPos:r,scrollAnchorHeight:o}=this.viewState;Math.abs(s-this.viewState.scrollTop)>1&&(o=-1),this.viewState.scrollAnchorHeight=-1;try{for(let l=0;;l++){if(o<0)if(Ga(i))r=-1,o=this.viewState.heightMap.height;else{let d=this.viewState.scrollAnchorAt(s);r=d.from,o=d.top}this.updateState=1;let a=this.viewState.measure(this);if(!a&&!this.measureRequests.length&&this.viewState.scrollTarget==null)break;if(l>5){console.warn(this.measureRequests.length?"Measure loop restarted more than 5 times":"Viewport failed to stabilize");break}let f=[];a&4||([this.measureRequests,f]=[f,this.measureRequests]);let h=f.map(d=>{try{return d.read(this)}catch(p){return ae(this.state,p),Oa}}),c=Kn.create(this,this.state,[]),u=!1;c.flags|=a,t?t.flags|=a:t=c,this.updateState=2,c.empty||(this.updatePlugins(c),this.inputState.update(c),this.updateAttrs(),u=this.docView.update(c),u&&this.docViewUpdate());for(let d=0;d<f.length;d++)if(h[d]!=Oa)try{let p=f[d];p.write&&p.write(h[d],this)}catch(p){ae(this.state,p)}if(u&&this.docView.updateSelection(!0),!c.viewportChanged&&this.measureRequests.length==0){if(this.viewState.editorHeight)if(this.viewState.scrollTarget){this.docView.scrollIntoView(this.viewState.scrollTarget),this.viewState.scrollTarget=null,o=-1;continue}else{let p=(r<0?this.viewState.heightMap.height:this.viewState.lineBlockAt(r).top)-o;if(p>1||p<-1){s=s+p,i.scrollTop=s/this.scaleY,o=-1;continue}}break}}}finally{this.updateState=0,this.measureScheduled=-1}if(t&&!t.empty)for(let l of this.state.facet(Dr))l(t)}get themeClasses(){return $r+" "+(this.state.facet(Kr)?Nh:Ih)+" "+this.state.facet(Bn)}updateAttrs(){let e=Ba(this,yh,{class:"cm-editor"+(this.hasFocus?" cm-focused ":" ")+this.themeClasses}),t={spellcheck:"false",autocorrect:"off",autocapitalize:"off",writingsuggestions:"false",translate:"no",contenteditable:this.state.facet(at)?"true":"false",class:"cm-content",style:`${D.tabSize}: ${this.state.tabSize}`,role:"textbox","aria-multiline":"true"};this.state.readOnly&&(t["aria-readonly"]="true"),Ba(this,ho,t);let i=this.observer.ignore(()=>{let s=Cr(this.contentDOM,this.contentAttrs,t),r=Cr(this.dom,this.editorAttrs,e);return s||r});return this.editorAttrs=e,this.contentAttrs=t,i}showAnnouncements(e){let t=!0;for(let i of e)for(let s of i.effects)if(s.is(n.announce)){t&&(this.announceDOM.textContent=""),t=!1;let r=this.announceDOM.appendChild(document.createElement("div"));r.textContent=s.value}}mountStyles(){this.styleModules=this.state.facet(bi);let e=this.state.facet(n.cspNonce);Pe.mount(this.root,this.styleModules.concat(Dd).reverse(),e?{nonce:e}:void 0)}readMeasured(){if(this.updateState==2)throw new Error("Reading the editor layout isn't allowed during an update");this.updateState==0&&this.measureScheduled>-1&&this.measure(!1)}requestMeasure(e){if(this.measureScheduled<0&&(this.measureScheduled=this.win.requestAnimationFrame(()=>this.measure())),e){if(this.measureRequests.indexOf(e)>-1)return;if(e.key!=null){for(let t=0;t<this.measureRequests.length;t++)if(this.measureRequests[t].key===e.key){this.measureRequests[t]=e;return}}this.measureRequests.push(e)}}plugin(e){let t=this.pluginMap.get(e);return(t===void 0||t&&t.plugin!=e)&&this.pluginMap.set(e,t=this.plugins.find(i=>i.plugin==e)||null),t&&t.update(this).value}get documentTop(){return this.contentDOM.getBoundingClientRect().top+this.viewState.paddingTop}get documentPadding(){return{top:this.viewState.paddingTop,bottom:this.viewState.paddingBottom}}get scaleX(){return this.viewState.scaleX}get scaleY(){return this.viewState.scaleY}elementAtHeight(e){return this.readMeasured(),this.viewState.elementAtHeight(e)}lineBlockAtHeight(e){return this.readMeasured(),this.viewState.lineBlockAtHeight(e)}get viewportLineBlocks(){return this.viewState.viewportLines}lineBlockAt(e){return this.viewState.lineBlockAt(e)}get contentHeight(){return this.viewState.contentHeight}moveByChar(e,t,i){return ur(this,e,da(this,e,t,i))}moveByGroup(e,t){return ur(this,e,da(this,e,t,i=>Zu(this,e.head,i)))}visualLineSide(e,t){let i=this.bidiSpans(e),s=this.textDirectionAt(e.from),r=i[t?i.length-1:0];return b.cursor(r.side(t,s)+e.from,r.forward(!t,s)?1:-1)}moveToLineBoundary(e,t,i=!0){return Qu(this,e,t,i)}moveVertically(e,t,i){return ur(this,e,ed(this,e,t,i))}domAtPos(e){return this.docView.domAtPos(e)}posAtDOM(e,t=0){return this.docView.posFromDOM(e,t)}posAtCoords(e,t=!0){return this.readMeasured(),kh(this,e,t)}coordsAtPos(e,t=1){this.readMeasured();let i=this.docView.coordsAt(e,t);if(!i||i.left==i.right)return i;let s=this.state.doc.lineAt(e),r=this.bidiSpans(s),o=r[Je.find(r,e-s.from,-1,t)];return is(i,o.dir==K.LTR==t>0)}coordsForChar(e){return this.readMeasured(),this.docView.coordsForChar(e)}get defaultCharacterWidth(){return this.viewState.heightOracle.charWidth}get defaultLineHeight(){return this.viewState.heightOracle.lineHeight}get textDirection(){return this.viewState.defaultTextDirection}textDirectionAt(e){return!this.state.facet(dh)||e<this.viewport.from||e>this.viewport.to?this.textDirection:(this.readMeasured(),this.docView.textDirectionAt(e))}get lineWrapping(){return this.viewState.heightOracle.lineWrapping}bidiSpans(e){if(e.length>Ed)return rh(e.length);let t=this.textDirectionAt(e.from),i;for(let r of this.bidiCache)if(r.from==e.from&&r.dir==t&&(r.fresh||sh(r.isolates,i=aa(this,e))))return r.order;i||(i=aa(this,e));let s=Nu(e.text,t,i);return this.bidiCache.push(new Yn(e.from,e.to,t,i,!0,s)),s}get hasFocus(){var e;return(this.dom.ownerDocument.hasFocus()||D.safari&&((e=this.inputState)===null||e===void 0?void 0:e.lastContextMenu)>Date.now()-3e4)&&this.root.activeElement==this.contentDOM}focus(){this.observer.ignore(()=>{ja(this.contentDOM),this.docView.updateSelection()})}setRoot(e){this._root!=e&&(this._root=e,this.observer.setWindow((e.nodeType==9?e:e.ownerDocument).defaultView||window),this.mountStyles())}destroy(){this.root.activeElement==this.contentDOM&&this.contentDOM.blur();for(let e of this.plugins)e.destroy(this);this.plugins=[],this.inputState.destroy(),this.docView.destroy(),this.dom.remove(),this.observer.destroy(),this.measureScheduled>-1&&this.win.cancelAnimationFrame(this.measureScheduled),this.destroyed=!0}static scrollIntoView(e,t={}){return An.of(new Ci(typeof e=="number"?b.cursor(e):e,t.y,t.x,t.yMargin,t.xMargin))}scrollSnapshot(){let{scrollTop:e,scrollLeft:t}=this.scrollDOM,i=this.viewState.scrollAnchorAt(e);return An.of(new Ci(b.cursor(i.from),"start","start",i.top-e,t,!0))}setTabFocusMode(e){e==null?this.inputState.tabFocusMode=this.inputState.tabFocusMode<0?0:-1:typeof e=="boolean"?this.inputState.tabFocusMode=e?0:-1:this.inputState.tabFocusMode!=0&&(this.inputState.tabFocusMode=Date.now()+e)}static domEventHandlers(e){return X.define(()=>({}),{eventHandlers:e})}static domEventObservers(e){return X.define(()=>({}),{eventObservers:e})}static theme(e,t){let i=Pe.newName(),s=[Bn.of(i),bi.of(jr(`.${i}`,e))];return t&&t.dark&&s.push(Kr.of(!0)),s}static baseTheme(e){return Ve.lowest(bi.of(jr("."+$r,e,Fh)))}static findFromDOM(e){var t;let i=e.querySelector(".cm-content"),s=i&&G.get(i)||G.get(e);return((t=s?.rootView)===null||t===void 0?void 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n(t.mapPos(o.from,1),t.mapPos(o.to,-1),o.dir,o.isolates,!1,o.order))}return i}};function Ba(n,e,t){for(let i=n.state.facet(e),s=i.length-1;s>=0;s--){let r=i[s],o=typeof r=="function"?r(n):r;o&&Sr(o,t)}return t}var Pd=D.mac?"mac":D.windows?"win":D.linux?"linux":"key";function Ld(n,e){let t=n.split(/-(?!$)/),i=t[t.length-1];i=="Space"&&(i=" ");let s,r,o,l;for(let a=0;a<t.length-1;++a){let f=t[a];if(/^(cmd|meta|m)$/i.test(f))l=!0;else if(/^a(lt)?$/i.test(f))s=!0;else if(/^(c|ctrl|control)$/i.test(f))r=!0;else if(/^s(hift)?$/i.test(f))o=!0;else if(/^mod$/i.test(f))e=="mac"?l=!0:r=!0;else throw new Error("Unrecognized modifier name: "+f)}return s&&(i="Alt-"+i),r&&(i="Ctrl-"+i),l&&(i="Meta-"+i),o&&(i="Shift-"+i),i}function En(n,e,t){return e.altKey&&(n="Alt-"+n),e.ctrlKey&&(n="Ctrl-"+n),e.metaKey&&(n="Meta-"+n),t!==!1&&e.shiftKey&&(n="Shift-"+n),n}var Rd=Ve.default(O.domEventHandlers({keydown(n,e){return Wh(Hh(e.state),n,e,"editor")}})),si=T.define({enables:Rd}),Ea=new WeakMap;function Hh(n){let e=n.facet(si),t=Ea.get(e);return t||Ea.set(e,t=Nd(e.reduce((i,s)=>i.concat(s),[]))),t}function Vh(n,e,t){return Wh(Hh(n.state),e,n,t)}var ct=null,Id=4e3;function Nd(n,e=Pd){let t=Object.create(null),i=Object.create(null),s=(o,l)=>{let a=i[o];if(a==null)i[o]=l;else if(a!=l)throw new Error("Key binding "+o+" is used both as a regular binding and as a multi-stroke prefix")},r=(o,l,a,f,h)=>{var c,u;let d=t[o]||(t[o]=Object.create(null)),p=l.split(/ (?!$)/).map(y=>Ld(y,e));for(let y=1;y<p.length;y++){let x=p.slice(0,y).join(" ");s(x,!0),d[x]||(d[x]={preventDefault:!0,stopPropagation:!1,run:[w=>{let k=ct={view:w,prefix:x,scope:o};return setTimeout(()=>{ct==k&&(ct=null)},Id),!0}]})}let m=p.join(" ");s(m,!1);let g=d[m]||(d[m]={preventDefault:!1,stopPropagation:!1,run:((u=(c=d._any)===null||c===void 0?void 0:c.run)===null||u===void 0?void 0:u.slice())||[]});a&&g.run.push(a),f&&(g.preventDefault=!0),h&&(g.stopPropagation=!0)};for(let o of n){let l=o.scope?o.scope.split(" 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Yr=class{constructor(e,t){this.view=e,this.layer=t,this.drawn=[],this.scaleX=1,this.scaleY=1,this.measureReq={read:this.measure.bind(this),write:this.draw.bind(this)},this.dom=e.scrollDOM.appendChild(document.createElement("div")),this.dom.classList.add("cm-layer"),t.above&&this.dom.classList.add("cm-layer-above"),t.class&&this.dom.classList.add(t.class),this.scale(),this.dom.setAttribute("aria-hidden","true"),this.setOrder(e.state),e.requestMeasure(this.measureReq),t.mount&&t.mount(this.dom,e)}update(e){e.startState.facet(Fn)!=e.state.facet(Fn)&&this.setOrder(e.state),(this.layer.update(e,this.dom)||e.geometryChanged)&&(this.scale(),e.view.requestMeasure(this.measureReq))}docViewUpdate(e){this.layer.updateOnDocViewUpdate!==!1&&e.requestMeasure(this.measureReq)}setOrder(e){let t=0,i=e.facet(Fn);for(;t<i.length&&i[t]!=this.layer;)t++;this.dom.style.zIndex=String((this.layer.above?150:-1)-t)}measure(){return this.layer.markers(this.view)}scale(){let{scaleX:e,scaleY:t}=this.view;(e!=this.scaleX||t!=this.scaleY)&&(this.scaleX=e,this.scaleY=t,this.dom.style.transform=`scale(${1/e}, ${1/t})`)}draw(e){if(e.length!=this.drawn.length||e.some((t,i)=>!Hd(t,this.drawn[i]))){let t=this.dom.firstChild,i=0;for(let s of e)s.update&&t&&s.constructor&&this.drawn[i].constructor&&s.update(t,this.drawn[i])?(t=t.nextSibling,i++):this.dom.insertBefore(s.draw(),t);for(;t;){let s=t.nextSibling;t.remove(),t=s}this.drawn=e,D.safari&&D.safari_version>=26&&(this.dom.style.display=this.dom.firstChild?"":"none")}}destroy(){this.layer.destroy&&this.layer.destroy(this.dom,this.view),this.dom.remove()}},Fn=T.define();function qh(n){return[X.define(e=>new Yr(e,n)),Fn.of(n)]}var Hi=T.define({combine(n){return fe(n,{cursorBlinkRate:1200,drawRangeCursor:!0},{cursorBlinkRate:(e,t)=>Math.min(e,t),drawRangeCursor:(e,t)=>e||t})}});function uo(n={}){return[Hi.of(n),Vd,Wd,zd,ph.of(!0)]}function Kh(n){return 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e=n.state.facet(Hn);n.startState.facet(Hn)!=e?(this.decorator=this.makeDecorator(e),this.decorations=this.decorator.createDeco(n.view)):this.decorations=this.decorator.updateDeco(n,this.decorations)}},{decorations:n=>n.decorations}))}var _d="\u2022";function Yd(n){return n>=32?_d:n==10?"\u2424":String.fromCharCode(9216+n)}var Qr=class extends Ae{constructor(e,t){super(),this.options=e,this.code=t}eq(e){return e.code==this.code}toDOM(e){let t=Yd(this.code),i=e.state.phrase("Control character")+" "+(jd[this.code]||"0x"+this.code.toString(16)),s=this.options.render&&this.options.render(this.code,i,t);if(s)return s;let r=document.createElement("span");return r.textContent=t,r.title=i,r.setAttribute("aria-label",i),r.className="cm-specialChar",r}ignoreEvent(){return!1}},Zr=class extends Ae{constructor(e){super(),this.width=e}eq(e){return e.width==this.width}toDOM(){let e=document.createElement("span");return 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r?n=n.addChanges(r,o,l,t,e):e.selection&&(n=n.addSelection(e.startState.selection,o,l,t.newGroupDelay)),(s=="full"||s=="after")&&(n=n.isolate()),n},toJSON(n){return{done:n.done.map(e=>e.toJSON()),undone:n.undone.map(e=>e.toJSON())}},fromJSON(n){return new Wt(n.done.map(Ke.fromJSON),n.undone.map(Ke.fromJSON))}});function Xo(n={}){return[$f,Kf.of(n),O.domEventHandlers({beforeinput(e,t){let i=e.inputType=="historyUndo"?jf:e.inputType=="historyRedo"?Uo:null;return i?(e.preventDefault(),i(t)):!1}})]}function xs(n,e){return function({state:t,dispatch:i}){if(!e&&t.readOnly)return!1;let s=t.field($f,!1);if(!s)return!1;let r=s.pop(n,t,e);return r?(i(r),!0):!1}}var jf=xs(0,!1),Uo=xs(1,!1),vm=xs(0,!0),km=xs(1,!0);var Ke=class n{constructor(e,t,i,s,r){this.changes=e,this.effects=t,this.mapped=i,this.startSelection=s,this.selectionsAfter=r}setSelAfter(e){return new n(this.changes,this.effects,this.mapped,this.startSelection,e)}toJSON(){var e,t,i;return{changes:(e=this.changes)===null||e===void 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r.length>0&&t-this.prevTime<s&&i==this.prevUserEvent&&i&&/^select($|\.)/.test(i)&&Cm(r[r.length-1],e)?this:new n(Gf(this.done,e),this.undone,t,i)}addMapping(e){return new n($o(this.done,e),$o(this.undone,e),this.prevTime,this.prevUserEvent)}pop(e,t,i){let s=e==0?this.done:this.undone;if(s.length==0)return null;let r=s[s.length-1],o=r.selectionsAfter[0]||t.selection;if(i&&r.selectionsAfter.length)return t.update({selection:r.selectionsAfter[r.selectionsAfter.length-1],annotations:jo.of({side:e,rest:Mm(s),selection:o}),userEvent:e==0?"select.undo":"select.redo",scrollIntoView:!0});if(r.changes){let l=s.length==1?Ne:s.slice(0,s.length-1);return r.mapped&&(l=$o(l,r.mapped)),t.update({changes:r.changes,selection:r.startSelection,effects:r.effects,annotations:jo.of({side:e,rest:l,selection:o}),filter:!1,userEvent:e==0?"undo":"redo",scrollIntoView:!0})}else return null}};Wt.empty=new Wt(Ne,Ne);var 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$m=n=>Fe(n,e=>vs(n.state,e,!ue(n))),jm=n=>Fe(n,e=>vs(n.state,e,ue(n)));function lc(n,e){return Fe(n,t=>n.moveVertically(t,e))}var ac=n=>lc(n,!1),hc=n=>lc(n,!0);function fc(n,e){return Fe(n,t=>n.moveVertically(t,e,tc(n).height))}var If=n=>fc(n,!1),Nf=n=>fc(n,!0),Um=n=>Fe(n,e=>wt(n,e,!0)),Gm=n=>Fe(n,e=>wt(n,e,!1)),_m=n=>Fe(n,e=>wt(n,e,!ue(n))),Ym=n=>Fe(n,e=>wt(n,e,ue(n))),Jm=n=>Fe(n,e=>b.cursor(n.lineBlockAt(e.head).from)),Xm=n=>Fe(n,e=>b.cursor(n.lineBlockAt(e.head).to)),Ff=({state:n,dispatch:e})=>(e($e(n,{anchor:0})),!0),Hf=({state:n,dispatch:e})=>(e($e(n,{anchor:n.doc.length})),!0),Vf=({state:n,dispatch:e})=>(e($e(n,{anchor:n.selection.main.anchor,head:0})),!0),Wf=({state:n,dispatch:e})=>(e($e(n,{anchor:n.selection.main.anchor,head:n.doc.length})),!0),Qm=({state:n,dispatch:e})=>(e(n.update({selection:{anchor:0,head:n.doc.length},userEvent:"select"})),!0),Zm=({state:n,dispatch:e})=>{let t=ks(n).map(({from:i,to:s})=>b.range(i,Math.min(s+1,n.doc.length)));return 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t.ranges.length>1?i=b.create([t.main]):t.main.empty||(i=b.create([b.cursor(t.main.head)])),i?(e($e(n,i)),!0):!1};function en(n,e){if(n.state.readOnly)return!1;let t="delete.selection",{state:i}=n,s=i.changeByRange(r=>{let{from:o,to:l}=r;if(o==l){let a=e(r);a<o?(t="delete.backward",a=ys(n,a,!1)):a>o&&(t="delete.forward",a=ys(n,a,!0)),o=Math.min(o,a),l=Math.max(l,a)}else o=ys(n,o,!1),l=ys(n,l,!0);return o==l?{range:r}:{changes:{from:o,to:l},range:b.cursor(o,o<r.head?-1:1)}});return s.changes.empty?!1:(n.dispatch(i.update(s,{scrollIntoView:!0,userEvent:t,effects:t=="delete.selection"?O.announce.of(i.phrase("Selection deleted")):void 0})),!0)}function ys(n,e,t){if(n instanceof O)for(let i of n.state.facet(O.atomicRanges).map(s=>s(n)))i.between(e,e,(s,r)=>{s<e&&r>e&&(e=t?r:s)});return e}var uc=(n,e,t)=>en(n,i=>{let s=i.from,{state:r}=n,o=r.doc.lineAt(s),l,a;if(t&&!e&&s>o.from&&s<o.from+200&&!/[^ \t]/.test(l=o.text.slice(0,s-o.from))){if(l[l.length-1]=="	")return s-1;let 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e.head<t?t:Math.min(n.state.doc.length,e.head+1)});var ag=({state:n,dispatch:e})=>{if(n.readOnly)return!1;let t=n.changeByRange(i=>({changes:{from:i.from,to:i.to,insert:N.of(["",""])},range:b.cursor(i.from)}));return e(n.update(t,{scrollIntoView:!0,userEvent:"input"})),!0},hg=({state:n,dispatch:e})=>{if(n.readOnly)return!1;let t=n.changeByRange(i=>{if(!i.empty||i.from==0||i.from==n.doc.length)return{range:i};let s=i.from,r=n.doc.lineAt(s),o=s==r.from?s-1:Q(r.text,s-r.from,!1)+r.from,l=s==r.to?s+1:Q(r.text,s-r.from,!0)+r.from;return{changes:{from:o,to:l,insert:n.doc.slice(s,l).append(n.doc.slice(o,s))},range:b.cursor(l)}});return t.changes.empty?!1:(e(n.update(t,{scrollIntoView:!0,userEvent:"move.character"})),!0)};function ks(n){let e=[],t=-1;for(let i of n.selection.ranges){let s=n.doc.lineAt(i.from),r=n.doc.lineAt(i.to);if(!i.empty&&i.to==r.from&&(r=n.doc.lineAt(i.to-1)),t>=s.number){let o=e[e.length-1];o.to=r.to,o.ranges.push(i)}else 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V("button",{class:"cm-button",name:s,onclick:r,type:"button"},o)}this.dom=V("div",{onkeydown:s=>this.keydown(s),class:"cm-search"},[this.searchField,i("next",()=>Ls(e),[De(e,"next")]),i("prev",()=>Rs(e),[De(e,"previous")]),i("select",()=>Wg(e),[De(e,"all")]),V("label",null,[this.caseField,De(e,"match case")]),V("label",null,[this.reField,De(e,"regexp")]),V("label",null,[this.wordField,De(e,"by word")]),...e.state.readOnly?[]:[V("br"),this.replaceField,i("replace",()=>kc(e),[De(e,"replace")]),i("replaceAll",()=>qg(e),[De(e,"replace all")])],V("button",{name:"close",onclick:()=>Oc(e),"aria-label":De(e,"close"),type:"button"},["\xD7"])])}commit(){let e=new Os({search:this.searchField.value,caseSensitive:this.caseField.checked,regexp:this.reField.checked,wholeWord:this.wordField.checked,replace:this.replaceField.value});e.eq(this.query)||(this.query=e,this.view.dispatch({effects:sn.of(e)}))}keydown(e){Vh(this.view,e,"search-panel")?e.preventDefault():e.keyCode==13&&e.target==this.searchField?(e.preventDefault(),(e.shiftKey?Rs:Ls)(this.view)):e.keyCode==13&&e.target==this.replaceField&&(e.preventDefault(),kc(this.view))}update(e){for(let t of e.transactions)for(let i of t.effects)i.is(sn)&&!i.value.eq(this.query)&&this.setQuery(i.value)}setQuery(e){this.query=e,this.searchField.value=e.search,this.replaceField.value=e.replace,this.caseField.checked=e.caseSensitive,this.reField.checked=e.regexp,this.wordField.checked=e.wholeWord}mount(){this.searchField.select()}get pos(){return 80}get top(){return this.view.state.facet(fi).top}};function De(n,e){return n.state.phrase(e)}var Ss=30,Cs=/[\s\.,:;?!]/;function fl(n,{from:e,to:t}){let i=n.state.doc.lineAt(e),s=n.state.doc.lineAt(t).to,r=Math.max(i.from,e-Ss),o=Math.min(s,t+Ss),l=n.state.sliceDoc(r,o);if(r!=i.from){for(let a=0;a<Ss;a++)if(!Cs.test(l[a+1])&&Cs.test(l[a])){l=l.slice(a);break}}if(o!=s){for(let a=l.length-1;a>l.length-Ss;a--)if(!Cs.test(l[a-1])&&Cs.test(l[a])){l=l.slice(0,a);break}}return O.announce.of(`${n.state.phrase("current match")}. ${l} ${n.state.phrase("on line")} ${i.number}.`)}var Kg=O.baseTheme({".cm-panel.cm-search":{padding:"2px 6px 4px",position:"relative","& [name=close]":{position:"absolute",top:"0",right:"4px",backgroundColor:"inherit",border:"none",font:"inherit",padding:0,margin:0},"& input, & button, & label":{margin:".2em .6em .2em 0"},"& input[type=checkbox]":{marginRight:".2em"},"& label":{fontSize:"80%",whiteSpace:"pre"}},"&light .cm-searchMatch":{backgroundColor:"#ffff0054"},"&dark .cm-searchMatch":{backgroundColor:"#00ffff8a"},"&light .cm-searchMatch-selected":{backgroundColor:"#ff6a0054"},"&dark .cm-searchMatch-selected":{backgroundColor:"#ff00ff8a"}}),$g=[vt,Ve.low(Vg),Kg];var Ns=class{constructor(e,t,i,s){this.state=e,this.pos=t,this.explicit=i,this.view=s,this.abortListeners=[],this.abortOnDocChange=!1}tokenBefore(e){let t=ie(this.state).resolveInner(this.pos,-1);for(;t&&e.indexOf(t.name)<0;)t=t.parent;return t?{from:t.from,to:this.pos,text:this.state.sliceDoc(t.from,this.pos),type:t.type}:null}matchBefore(e){let t=this.state.doc.lineAt(this.pos),i=Math.max(t.from,this.pos-250),s=t.text.slice(i-t.from,this.pos-t.from),r=s.search(Hc(e,!1));return r<0?null:{from:i+r,to:this.pos,text:s.slice(r)}}get aborted(){return this.abortListeners==null}addEventListener(e,t,i){e=="abort"&&this.abortListeners&&(this.abortListeners.push(t),i&&i.onDocChange&&(this.abortOnDocChange=!0))}};function Ec(n){let e=Object.keys(n).join(""),t=/\w/.test(e);return t&&(e=e.replace(/\w/g,"")),`[${t?"\\w":""}${e.replace(/[^\w\s]/g,"\\$&")}]`}function jg(n){let e=Object.create(null),t=Object.create(null);for(let{label:s}of n){e[s[0]]=!0;for(let r=1;r<s.length;r++)t[s[r]]=!0}let i=Ec(e)+Ec(t)+"*$";return[new RegExp("^"+i),new RegExp(i)]}function Ug(n){let e=n.map(s=>typeof s=="string"?{label:s}:s),[t,i]=e.every(s=>/^\w+$/.test(s.label))?[/\w*$/,/\w+$/]:jg(e);return s=>{let r=s.matchBefore(i);return r||s.explicit?{from:r?r.from:s.pos,options:e,validFor:t}:null}}var Fs=class{constructor(e,t,i,s){this.completion=e,this.source=t,this.match=i,this.score=s}};function qt(n){return n.selection.main.from}function Hc(n,e){var t;let{source:i}=n,s=e&&i[0]!="^",r=i[i.length-1]!="$";return!s&&!r?n:new RegExp(`${s?"^":""}(?:${i})${r?"$":""}`,(t=n.flags)!==null&&t!==void 0?t:n.ignoreCase?"i":"")}var Vc=be.define();function Gg(n,e,t,i){let{main:s}=n.selection,r=t-s.from,o=i-s.from;return{...n.changeByRange(l=>{if(l!=s&&t!=i&&n.sliceDoc(l.from+r,l.from+o)!=n.sliceDoc(t,i))return{range:l};let a=n.toText(e);return{changes:{from:l.from+r,to:i==s.from?l.to:l.from+o,insert:a},range:b.cursor(l.from+r+a.length)}}),scrollIntoView:!0,userEvent:"input.complete"}}var Pc=new WeakMap;function _g(n){if(!Array.isArray(n))return n;let e=Pc.get(n);return e||Pc.set(n,e=Ug(n)),e}var Hs=P.define(),on=P.define(),pl=class{constructor(e){this.pattern=e,this.chars=[],this.folded=[],this.any=[],this.precise=[],this.byWord=[],this.score=0,this.matched=[];for(let t=0;t<e.length;){let i=oe(e,t),s=Se(i);this.chars.push(i);let r=e.slice(t,t+s),o=r.toUpperCase();this.folded.push(oe(o==r?r.toLowerCase():o,0)),t+=s}this.astral=e.length!=this.chars.length}ret(e,t){return this.score=e,this.matched=t,this}match(e){if(this.pattern.length==0)return this.ret(-100,[]);if(e.length<this.pattern.length)return null;let{chars:t,folded:i,any:s,precise:r,byWord:o}=this;if(t.length==1){let x=oe(e,0),w=Se(x),k=w==e.length?0:-100;if(x!=t[0])if(x==i[0])k+=-200;else return null;return this.ret(k,[0,w])}let l=e.indexOf(this.pattern);if(l==0)return this.ret(e.length==this.pattern.length?0:-100,[0,this.pattern.length]);let a=t.length,f=0;if(l<0){for(let x=0,w=Math.min(e.length,200);x<w&&f<a;){let k=oe(e,x);(k==t[f]||k==i[f])&&(s[f++]=x),x+=Se(k)}if(f<a)return null}let h=0,c=0,u=!1,d=0,p=-1,m=-1,g=/[a-z]/.test(e),y=!0;for(let x=0,w=Math.min(e.length,200),k=0;x<w&&c<a;){let v=oe(e,x);l<0&&(h<a&&v==t[h]&&(r[h++]=x),d<a&&(v==t[d]||v==i[d]?(d==0&&(p=x),m=x+1,d++):d=0));let S,A=v<255?v>=48&&v<=57||v>=97&&v<=122?2:v>=65&&v<=90?1:0:(S=yi(v))!=S.toLowerCase()?1:S!=S.toUpperCase()?2:0;(!x||A==1&&g||k==0&&A!=0)&&(t[c]==v||i[c]==v&&(u=!0)?o[c++]=x:o.length&&(y=!1)),k=A,x+=Se(v)}return c==a&&o[0]==0&&y?this.result(-100+(u?-200:0),o,e):d==a&&p==0?this.ret(-200-e.length+(m==e.length?0:-100),[0,m]):l>-1?this.ret(-700-e.length,[l,l+this.pattern.length]):d==a?this.ret(-900-e.length,[p,m]):c==a?this.result(-100+(u?-200:0)+-700+(y?0:-1100),o,e):t.length==2?null:this.result((s[0]?-700:0)+-200+-1100,s,e)}result(e,t,i){let s=[],r=0;for(let o of t){let l=o+(this.astral?Se(oe(i,o)):1);r&&s[r-1]==o?s[r-1]=l:(s[r++]=o,s[r++]=l)}return this.ret(e-i.length,s)}},ml=class{constructor(e){this.pattern=e,this.matched=[],this.score=0,this.folded=e.toLowerCase()}match(e){if(e.length<this.pattern.length)return null;let t=e.slice(0,this.pattern.length),i=t==this.pattern?0:t.toLowerCase()==this.folded?-200:null;return i==null?null:(this.matched=[0,t.length],this.score=i+(e.length==this.pattern.length?0:-100),this)}},ne=T.define({combine(n){return fe(n,{activateOnTyping:!0,activateOnCompletion:()=>!1,activateOnTypingDelay:100,selectOnOpen:!0,override:null,closeOnBlur:!0,maxRenderedOptions:100,defaultKeymap:!0,tooltipClass:()=>"",optionClass:()=>"",aboveCursor:!1,icons:!0,addToOptions:[],positionInfo:Yg,filterStrict:!1,compareCompletions:(e,t)=>(e.sortText||e.label).localeCompare(t.sortText||t.label),interactionDelay:75,updateSyncTime:100},{defaultKeymap:(e,t)=>e&&t,closeOnBlur:(e,t)=>e&&t,icons:(e,t)=>e&&t,tooltipClass:(e,t)=>i=>Lc(e(i),t(i)),optionClass:(e,t)=>i=>Lc(e(i),t(i)),addToOptions:(e,t)=>e.concat(t),filterStrict:(e,t)=>e||t})}});function Lc(n,e){return n?e?n+" "+e:n:e}function Yg(n,e,t,i,s,r){let o=n.textDirection==K.RTL,l=o,a=!1,f="top",h,c,u=e.left-s.left,d=s.right-e.right,p=i.right-i.left,m=i.bottom-i.top;if(l&&u<Math.min(p,d)?l=!1:!l&&d<Math.min(p,u)&&(l=!0),p<=(l?u:d))h=Math.max(s.top,Math.min(t.top,s.bottom-m))-e.top,c=Math.min(400,l?u:d);else{a=!0,c=Math.min(400,(o?e.right:s.right-e.left)-30);let x=s.bottom-e.bottom;x>=m||x>e.top?h=t.bottom-e.top:(f="bottom",h=e.bottom-t.top)}let g=(e.bottom-e.top)/r.offsetHeight,y=(e.right-e.left)/r.offsetWidth;return{style:`${f}: ${h/g}px; max-width: ${c/y}px`,class:"cm-completionInfo-"+(a?o?"left-narrow":"right-narrow":l?"left":"right")}}function Jg(n){let e=n.addToOptions.slice();return n.icons&&e.push({render(t){let i=document.createElement("div");return i.classList.add("cm-completionIcon"),t.type&&i.classList.add(...t.type.split(/\s+/g).map(s=>"cm-completionIcon-"+s)),i.setAttribute("aria-hidden","true"),i},position:20}),e.push({render(t,i,s,r){let o=document.createElement("span");o.className="cm-completionLabel";let l=t.displayLabel||t.label,a=0;for(let f=0;f<r.length;){let h=r[f++],c=r[f++];h>a&&o.appendChild(document.createTextNode(l.slice(a,h)));let u=o.appendChild(document.createElement("span"));u.appendChild(document.createTextNode(l.slice(h,c))),u.className="cm-completionMatchedText",a=c}return a<l.length&&o.appendChild(document.createTextNode(l.slice(a))),o},position:50},{render(t){if(!t.detail)return null;let i=document.createElement("span");return i.className="cm-completionDetail",i.textContent=t.detail,i},position:80}),e.sort((t,i)=>t.position-i.position).map(t=>t.render)}function cl(n,e,t){if(n<=t)return{from:0,to:n};if(e<0&&(e=0),e<=n>>1){let s=Math.floor(e/t);return{from:s*t,to:(s+1)*t}}let i=Math.floor((n-e)/t);return{from:n-(i+1)*t,to:n-i*t}}var gl=class{constructor(e,t,i){this.view=e,this.stateField=t,this.applyCompletion=i,this.info=null,this.infoDestroy=null,this.placeInfoReq={read:()=>this.measureInfo(),write:a=>this.placeInfo(a),key:this},this.space=null,this.currentClass="";let s=e.state.field(t),{options:r,selected:o}=s.open,l=e.state.facet(ne);this.optionContent=Jg(l),this.optionClass=l.optionClass,this.tooltipClass=l.tooltipClass,this.range=cl(r.length,o,l.maxRenderedOptions),this.dom=document.createElement("div"),this.dom.className="cm-tooltip-autocomplete",this.updateTooltipClass(e.state),this.dom.addEventListener("mousedown",a=>{let{options:f}=e.state.field(t).open;for(let h=a.target,c;h&&h!=this.dom;h=h.parentNode)if(h.nodeName=="LI"&&(c=/-(\d+)$/.exec(h.id))&&+c[1]<f.length){this.applyCompletion(e,f[+c[1]]),a.preventDefault();return}}),this.dom.addEventListener("focusout",a=>{let f=e.state.field(this.stateField,!1);f&&f.tooltip&&e.state.facet(ne).closeOnBlur&&a.relatedTarget!=e.contentDOM&&e.dispatch({effects:on.of(null)})}),this.showOptions(r,s.id)}mount(){this.updateSel()}showOptions(e,t){this.list&&this.list.remove(),this.list=this.dom.appendChild(this.createListBox(e,t,this.range)),this.list.addEventListener("scroll",()=>{this.info&&this.view.requestMeasure(this.placeInfoReq)})}update(e){var t;let i=e.state.field(this.stateField),s=e.startState.field(this.stateField);if(this.updateTooltipClass(e.state),i!=s){let{options:r,selected:o,disabled:l}=i.open;(!s.open||s.open.options!=r)&&(this.range=cl(r.length,o,e.state.facet(ne).maxRenderedOptions),this.showOptions(r,i.id)),this.updateSel(),l!=((t=s.open)===null||t===void 0?void 0:t.disabled)&&this.dom.classList.toggle("cm-tooltip-autocomplete-disabled",!!l)}}updateTooltipClass(e){let t=this.tooltipClass(e);if(t!=this.currentClass){for(let i of this.currentClass.split(" "))i&&this.dom.classList.remove(i);for(let i of t.split(" "))i&&this.dom.classList.add(i);this.currentClass=t}}positioned(e){this.space=e,this.info&&this.view.requestMeasure(this.placeInfoReq)}updateSel(){let e=this.view.state.field(this.stateField),t=e.open;(t.selected>-1&&t.selected<this.range.from||t.selected>=this.range.to)&&(this.range=cl(t.options.length,t.selected,this.view.state.facet(ne).maxRenderedOptions),this.showOptions(t.options,e.id));let i=this.updateSelectedOption(t.selected);if(i){this.destroyInfo();let{completion:s}=t.options[t.selected],{info:r}=s;if(!r)return;let o=typeof r=="string"?document.createTextNode(r):r(s);if(!o)return;"then"in o?o.then(l=>{l&&this.view.state.field(this.stateField,!1)==e&&this.addInfoPane(l,s)}).catch(l=>ae(this.view.state,l,"completion info")):(this.addInfoPane(o,s),i.setAttribute("aria-describedby",this.info.id))}}addInfoPane(e,t){this.destroyInfo();let i=this.info=document.createElement("div");if(i.className="cm-tooltip cm-completionInfo",i.id="cm-completionInfo-"+Math.floor(Math.random()*65535).toString(16),e.nodeType!=null)i.appendChild(e),this.infoDestroy=null;else{let{dom:s,destroy:r}=e;i.appendChild(s),this.infoDestroy=r||null}this.dom.appendChild(i),this.view.requestMeasure(this.placeInfoReq)}updateSelectedOption(e){let t=null;for(let i=this.list.firstChild,s=this.range.from;i;i=i.nextSibling,s++)i.nodeName!="LI"||!i.id?s--:s==e?i.hasAttribute("aria-selected")||(i.setAttribute("aria-selected","true"),t=i):i.hasAttribute("aria-selected")&&(i.removeAttribute("aria-selected"),i.removeAttribute("aria-describedby"));return t&&Qg(this.list,t),t}measureInfo(){let e=this.dom.querySelector("[aria-selected]");if(!e||!this.info)return null;let t=this.dom.getBoundingClientRect(),i=this.info.getBoundingClientRect(),s=e.getBoundingClientRect(),r=this.space;if(!r){let o=this.dom.ownerDocument.documentElement;r={left:0,top:0,right:o.clientWidth,bottom:o.clientHeight}}return s.top>Math.min(r.bottom,t.bottom)-10||s.bottom<Math.max(r.top,t.top)+10?null:this.view.state.facet(ne).positionInfo(this.view,t,s,i,r,this.dom)}placeInfo(e){this.info&&(e?(e.style&&(this.info.style.cssText=e.style),this.info.className="cm-tooltip cm-completionInfo "+(e.class||"")):this.info.style.cssText="top: -1e6px")}createListBox(e,t,i){let s=document.createElement("ul");s.id=t,s.setAttribute("role","listbox"),s.setAttribute("aria-expanded","true"),s.setAttribute("aria-label",this.view.state.phrase("Completions")),s.addEventListener("mousedown",o=>{o.target==s&&o.preventDefault()});let r=null;for(let o=i.from;o<i.to;o++){let{completion:l,match:a}=e[o],{section:f}=l;if(f){let u=typeof f=="string"?f:f.name;if(u!=r&&(o>i.from||i.from==0))if(r=u,typeof f!="string"&&f.header)s.appendChild(f.header(f));else{let d=s.appendChild(document.createElement("completion-section"));d.textContent=u}}let h=s.appendChild(document.createElement("li"));h.id=t+"-"+o,h.setAttribute("role","option");let c=this.optionClass(l);c&&(h.className=c);for(let u of this.optionContent){let d=u(l,this.view.state,this.view,a);d&&h.appendChild(d)}}return i.from&&s.classList.add("cm-completionListIncompleteTop"),i.to<e.length&&s.classList.add("cm-completionListIncompleteBottom"),s}destroyInfo(){this.info&&(this.infoDestroy&&this.infoDestroy(),this.info.remove(),this.info=null)}destroy(){this.destroyInfo()}};function Xg(n,e){return t=>new gl(t,n,e)}function Qg(n,e){let t=n.getBoundingClientRect(),i=e.getBoundingClientRect(),s=t.height/n.offsetHeight;i.top<t.top?n.scrollTop-=(t.top-i.top)/s:i.bottom>t.bottom&&(n.scrollTop+=(i.bottom-t.bottom)/s)}function Rc(n){return(n.boost||0)*100+(n.apply?10:0)+(n.info?5:0)+(n.type?1:0)}function Zg(n,e){let t=[],i=null,s=null,r=h=>{t.push(h);let{section:c}=h.completion;if(c){i||(i=[]);let u=typeof c=="string"?c:c.name;i.some(d=>d.name==u)||i.push(typeof c=="string"?{name:u}:c)}},o=e.facet(ne);for(let h of n)if(h.hasResult()){let c=h.result.getMatch;if(h.result.filter===!1)for(let u of h.result.options)r(new Fs(u,h.source,c?c(u):[],1e9-t.length));else{let u=e.sliceDoc(h.from,h.to),d,p=o.filterStrict?new ml(u):new pl(u);for(let m of h.result.options)if(d=p.match(m.label)){let g=m.displayLabel?c?c(m,d.matched):[]:d.matched,y=d.score+(m.boost||0);if(r(new Fs(m,h.source,g,y)),typeof m.section=="object"&&m.section.rank==="dynamic"){let{name:x}=m.section;s||(s=Object.create(null)),s[x]=Math.max(y,s[x]||-1e9)}}}}if(i){let h=Object.create(null),c=0,u=(d,p)=>(d.rank==="dynamic"&&p.rank==="dynamic"?s[p.name]-s[d.name]:0)||(typeof d.rank=="number"?d.rank:1e9)-(typeof p.rank=="number"?p.rank:1e9)||(d.name<p.name?-1:1);for(let d of i.sort(u))c-=1e5,h[d.name]=c;for(let d of t){let{section:p}=d.completion;p&&(d.score+=h[typeof p=="string"?p:p.name])}}let l=[],a=null,f=o.compareCompletions;for(let h of t.sort((c,u)=>u.score-c.score||f(c.completion,u.completion))){let 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n(this.options,this.attrs,{...this.tooltip,pos:e.mapPos(this.tooltip.pos)},this.timestamp,this.selected,this.disabled)}setDisabled(){return new n(this.options,this.attrs,this.tooltip,this.timestamp,this.selected,!0)}},bl=class n{constructor(e,t,i){this.active=e,this.id=t,this.open=i}static start(){return new n(n0,"cm-ac-"+Math.floor(Math.random()*2e6).toString(36),null)}update(e){let{state:t}=e,i=t.facet(ne),r=(i.override||t.languageDataAt("autocomplete",qt(t)).map(_g)).map(a=>(this.active.find(h=>h.source==a)||new ht(a,this.active.some(h=>h.state!=0)?1:0)).update(e,i));r.length==this.active.length&&r.every((a,f)=>a==this.active[f])&&(r=this.active);let 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r=e.slice().sort((d,p)=>d.from-p.from||d.to-p.to),o=new ke,l=[],a=0,f=i.doc.iter(),h=0,c=i.doc.length;for(let d=0;;){let p=d==r.length?null:r[d];if(!p&&!l.length)break;let m,g;if(l.length)m=a,g=l.reduce((w,k)=>Math.min(w,k.to),p&&p.from>m?p.from:1e8);else{if(m=p.from,m>c)break;g=p.to,l.push(p),d++}for(;d<r.length;){let w=r[d];if(w.from==m&&(w.to>w.from||w.to==m))l.push(w),d++,g=Math.min(w.to,g);else{g=Math.min(w.from,g);break}}g=Math.min(g,c);let y=!1;if(l.some(w=>w.from==m&&(w.to==g||g==c))&&(y=m==g,!y&&g-m<10)){let w=m-(h+f.value.length);w>0&&(f.next(w),h=m);for(let k=m;;){if(k>=g){y=!0;break}if(!f.lineBreak&&h+f.value.length>k)break;k=h+f.value.length,h+=f.value.length,f.next()}}let x=R0(l);if(y)o.add(m,m,B.widget({widget:new Cl(x),diagnostics:l.slice()}));else{let w=l.reduce((k,v)=>v.markClass?k+" "+v.markClass:k,"");o.add(m,g,B.mark({class:"cm-lintRange cm-lintRange-"+x+w,diagnostics:l.slice(),inclusiveEnd:l.some(k=>k.to>g)}))}if(a=g,a==c)break;for(let w=0;w<l.length;w++)l[w].to<=a&&l.splice(w--,1)}let u=o.finish();return new n(u,t,ci(u))}};function ci(n,e=null,t=0){let i=null;return n.between(t,1e9,(s,r,{spec:o})=>{if(!(e&&o.diagnostics.indexOf(e)<0))if(!i)i=new qs(s,r,e||o.diagnostics[0]);else{if(o.diagnostics.indexOf(i.diagnostic)<0)return!1;i=new qs(i.from,r,i.diagnostic)}}),i}function C0(n,e){let t=e.pos,i=e.end||t,s=n.state.facet(an).hideOn(n,t,i);if(s!=null)return s;let r=n.startState.doc.lineAt(e.pos);return!!(n.effects.some(o=>o.is(Xc))||n.changes.touchesRange(r.from,Math.max(r.to,i)))}function A0(n,e){return n.field(Oe,!1)?e:e.concat(P.appendConfig.of(I0))}var Xc=P.define(),Al=P.define(),Qc=P.define(),Oe=J.define({create(){return new Kt(B.none,null,null)},update(n,e){if(e.docChanged&&n.diagnostics.size){let t=n.diagnostics.map(e.changes),i=null,s=n.panel;if(n.selected){let r=e.changes.mapPos(n.selected.from,1);i=ci(t,n.selected.diagnostic,r)||ci(t,null,r)}!t.size&&s&&e.state.facet(an).autoPanel&&(s=null),n=new Kt(t,s,i)}for(let t of e.effects)if(t.is(Xc)){let i=e.state.facet(an).autoPanel?t.value.length?hn.open:null:n.panel;n=Kt.init(t.value,i,e.state)}else t.is(Al)?n=new Kt(n.diagnostics,t.value?hn.open:null,n.selected):t.is(Qc)&&(n=new Kt(n.diagnostics,n.panel,t.value));return n},provide:n=>[Lt.from(n,e=>e.panel),O.decorations.from(n,e=>e.diagnostics)]});var M0=B.mark({class:"cm-lintRange cm-lintRange-active"});function T0(n,e,t){let{diagnostics:i}=n.state.field(Oe),s,r=-1,o=-1;i.between(e-(t<0?1:0),e+(t>0?1:0),(a,f,{spec:h})=>{if(e>=a&&e<=f&&(a==f||(e>a||t>0)&&(e<f||t<0)))return s=h.diagnostics,r=a,o=f,!1});let l=n.state.facet(an).tooltipFilter;return s&&l&&(s=l(s,n.state)),s?{pos:r,end:o,above:n.state.doc.lineAt(r).to<o,create(){return{dom:D0(n,s)}}}:null}function D0(n,e){return V("ul",{class:"cm-tooltip-lint"},e.map(t=>tu(n,t,!1)))}var O0=n=>{let e=n.state.field(Oe,!1);(!e||!e.panel)&&n.dispatch({effects:A0(n.state,[Al.of(!0)])});let t=Rt(n,hn.open);return t&&t.dom.querySelector(".cm-panel-lint ul").focus(),!0},Yc=n=>{let e=n.state.field(Oe,!1);return!e||!e.panel?!1:(n.dispatch({effects:Al.of(!1)}),!0)},B0=n=>{let e=n.state.field(Oe,!1);if(!e)return!1;let t=n.state.selection.main,i=e.diagnostics.iter(t.to+1);return!i.value&&(i=e.diagnostics.iter(0),!i.value||i.from==t.from&&i.to==t.to)?!1:(n.dispatch({selection:{anchor:i.from,head:i.to},scrollIntoView:!0}),!0)};var Zc=[{key:"Mod-Shift-m",run:O0,preventDefault:!0},{key:"F8",run:B0}];var an=T.define({combine(n){return{sources:n.map(e=>e.source).filter(e=>e!=null),...fe(n.map(e=>e.config),{delay:750,markerFilter:null,tooltipFilter:null,needsRefresh:null,hideOn:()=>null},{delay:Math.max,markerFilter:Jc,tooltipFilter:Jc,needsRefresh:(e,t)=>e?t?i=>e(i)||t(i):e:t,hideOn:(e,t)=>e?t?(i,s,r)=>e(i,s,r)||t(i,s,r):e:t,autoPanel:(e,t)=>e||t})}}});function Jc(n,e){return n?e?(t,i)=>e(n(t,i),i):n:e}function eu(n){let e=[];if(n)e:for(let{name:t}of n){for(let i=0;i<t.length;i++){let s=t[i];if(/[a-zA-Z]/.test(s)&&!e.some(r=>r.toLowerCase()==s.toLowerCase())){e.push(s);continue e}}e.push("")}return e}function tu(n,e,t){var i;let s=t?eu(e.actions):[];return V("li",{class:"cm-diagnostic cm-diagnostic-"+e.severity},V("span",{class:"cm-diagnosticText"},e.renderMessage?e.renderMessage(n):e.message),(i=e.actions)===null||i===void 0?void 0:i.map((r,o)=>{let l=!1,a=d=>{if(d.preventDefault(),l)return;l=!0;let p=ci(n.state.field(Oe).diagnostics,e);p&&r.apply(n,p.from,p.to)},{name:f}=r,h=s[o]?f.indexOf(s[o]):-1,c=h<0?f:[f.slice(0,h),V("u",f.slice(h,h+1)),f.slice(h+1)],u=r.markClass?" 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if(s.keyCode==35)this.moveSelection(this.items.length-1);else if(s.keyCode==13)this.view.focus();else if(s.keyCode>=65&&s.keyCode<=90&&this.selectedIndex>=0){let{diagnostic:r}=this.items[this.selectedIndex],o=eu(r.actions);for(let l=0;l<o.length;l++)if(o[l].toUpperCase().charCodeAt(0)==s.keyCode){let a=ci(this.view.state.field(Oe).diagnostics,r);a&&r.actions[l].apply(e,a.from,a.to)}}else return;s.preventDefault()},i=s=>{for(let r=0;r<this.items.length;r++)this.items[r].dom.contains(s.target)&&this.moveSelection(r)};this.list=V("ul",{tabIndex:0,role:"listbox","aria-label":this.view.state.phrase("Diagnostics"),onkeydown:t,onclick:i}),this.dom=V("div",{class:"cm-panel-lint"},this.list,V("button",{type:"button",name:"close","aria-label":this.view.state.phrase("close"),onclick:()=>Yc(this.view)},"\xD7")),this.update()}get selectedIndex(){let e=this.view.state.field(Oe).selected;if(!e)return-1;for(let t=0;t<this.items.length;t++)if(this.items[t].diagnostic==e.diagnostic)return t;return-1}update(){let{diagnostics:e,selected:t}=this.view.state.field(Oe),i=0,s=!1,r=null,o=new Set;for(e.between(0,this.view.state.doc.length,(l,a,{spec:f})=>{for(let h of f.diagnostics){if(o.has(h))continue;o.add(h);let c=-1,u;for(let d=i;d<this.items.length;d++)if(this.items[d].diagnostic==h){c=d;break}c<0?(u=new Ks(this.view,h),this.items.splice(i,0,u),s=!0):(u=this.items[c],c>i&&(this.items.splice(i,c-i),s=!0)),t&&u.diagnostic==t.diagnostic?u.dom.hasAttribute("aria-selected")||(u.dom.setAttribute("aria-selected","true"),r=u):u.dom.hasAttribute("aria-selected")&&u.dom.removeAttribute("aria-selected"),i++}});i<this.items.length&&!(this.items.length==1&&this.items[0].diagnostic.from<0);)s=!0,this.items.pop();this.items.length==0&&(this.items.push(new Ks(this.view,{from:-1,to:-1,severity:"info",message:this.view.state.phrase("No diagnostics")})),s=!0),r?(this.list.setAttribute("aria-activedescendant",r.id),this.view.requestMeasure({key:this,read:()=>({sel:r.dom.getBoundingClientRect(),panel:this.list.getBoundingClientRect()}),write:({sel:l,panel:a})=>{let f=a.height/this.list.offsetHeight;l.top<a.top?this.list.scrollTop-=(a.top-l.top)/f:l.bottom>a.bottom&&(this.list.scrollTop+=(l.bottom-a.bottom)/f)}})):this.selectedIndex<0&&this.list.removeAttribute("aria-activedescendant"),s&&this.sync()}sync(){let e=this.list.firstChild;function t(){let i=e;e=i.nextSibling,i.remove()}for(let i of this.items)if(i.dom.parentNode==this.list){for(;e!=i.dom;)t();e=i.dom.nextSibling}else this.list.insertBefore(i.dom,e);for(;e;)t()}moveSelection(e){if(this.selectedIndex<0)return;let t=this.view.state.field(Oe),i=ci(t.diagnostics,this.items[e].diagnostic);i&&this.view.dispatch({selection:{anchor:i.from,head:i.to},scrollIntoView:!0,effects:Qc.of(i)})}static open(e){return new n(e)}};function E0(n,e='viewBox="0 0 40 40"'){return`url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" ${e}>${encodeURIComponent(n)}</svg>')`}function zs(n){return E0(`<path d="m0 2.5 l2 -1.5 l1 0 l2 1.5 l1 0" stroke="${n}" fill="none" stroke-width=".7"/>`,'width="6" height="3"')}var P0=O.baseTheme({".cm-diagnostic":{padding:"3px 6px 3px 8px",marginLeft:"-1px",display:"block",whiteSpace:"pre-wrap"},".cm-diagnostic-error":{borderLeft:"5px solid #d11"},".cm-diagnostic-warning":{borderLeft:"5px solid orange"},".cm-diagnostic-info":{borderLeft:"5px solid #999"},".cm-diagnostic-hint":{borderLeft:"5px solid #66d"},".cm-diagnosticAction":{font:"inherit",border:"none",padding:"2px 4px",backgroundColor:"#444",color:"white",borderRadius:"3px",marginLeft:"8px",cursor:"pointer"},".cm-diagnosticSource":{fontSize:"70%",opacity:.7},".cm-lintRange":{backgroundPosition:"left bottom",backgroundRepeat:"repeat-x",paddingBottom:"0.7px"},".cm-lintRange-error":{backgroundImage:zs("#d11")},".cm-lintRange-warning":{backgroundImage:zs("orange")},".cm-lintRange-info":{backgroundImage:zs("#999")},".cm-lintRange-hint":{backgroundImage:zs("#66d")},".cm-lintRange-active":{backgroundColor:"#ffdd9980"},".cm-tooltip-lint":{padding:0,margin:0},".cm-lintPoint":{position:"relative","&:after":{content:'""',position:"absolute",bottom:0,left:"-2px",borderLeft:"3px solid transparent",borderRight:"3px solid transparent",borderBottom:"4px solid #d11"}},".cm-lintPoint-warning":{"&:after":{borderBottomColor:"orange"}},".cm-lintPoint-info":{"&:after":{borderBottomColor:"#999"}},".cm-lintPoint-hint":{"&:after":{borderBottomColor:"#66d"}},".cm-panel.cm-panel-lint":{position:"relative","& ul":{maxHeight:"100px",overflowY:"auto","& [aria-selected]":{backgroundColor:"#ddd","& u":{textDecoration:"underline"}},"&:focus [aria-selected]":{background_fallback:"#bdf",backgroundColor:"Highlight",color_fallback:"white",color:"HighlightText"},"& u":{textDecoration:"none"},padding:0,margin:0},"& [name=close]":{position:"absolute",top:"0",right:"2px",background:"inherit",border:"none",font:"inherit",padding:0,margin:0}}});function L0(n){return n=="error"?4:n=="warning"?3:n=="info"?2:1}function R0(n){let e="hint",t=1;for(let i of n){let s=L0(i.severity);s>t&&(t=s,e=i.severity)}return e}var I0=[Oe,O.decorations.compute([Oe],n=>{let{selected:e,panel:t}=n.field(Oe);return!e||!t||e.from==e.to?B.none:B.set([M0.range(e.from,e.to)])}),Yh(T0,{hideOn:C0}),P0];var _y=[Qh(),Zh(),po(),Xo(),Df(),uo(),jh(),j.allowMultipleSelections.of(!0),wf(),qo(Ko,{fallback:!0}),Lf(),Kc(),_c(),Gh(),_h(),Uh(),Ac(),si.of([...Uc,...el,...Bc,...Qo,...Af,...Sl,...Zc])],Yy=[po(),Xo(),uo(),qo(Ko,{fallback:!0}),si.of([...el,...Qo])];export{O as EditorView,_y as basicSetup,Yy as minimalSetup};
+//# sourceMappingURL=codemirror.bundle.mjs.map
\ No newline at end of file
diff --git a/src/static/home.html b/src/static/home.html
new file mode 100644
index 0000000..38d9007
--- /dev/null
+++ b/src/static/home.html
@@ -0,0 +1,143 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Python Editor</title>
+  <link rel="icon" href="data:,">
+  <style>
+    * { box-sizing: border-box; }
+    body {
+      margin: 0;
+      min-height: 100vh;
+      display: grid;
+      place-items: center;
+      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+      background: linear-gradient(135deg, #0f172a, #1e293b);
+      color: #e2e8f0;
+    }
+    .home-card {
+      width: min(560px, 92vw);
+      background: rgba(15, 23, 42, 0.78);
+      border: 1px solid rgba(148, 163, 184, 0.25);
+      border-radius: 14px;
+      padding: 2rem;
+      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
+    }
+    h1 { margin: 0 0 0.75rem 0; font-size: 1.8rem; color: #f8fafc; }
+    p { margin: 0 0 1rem 0; color: #cbd5e1; line-height: 1.5; }
+    .btn {
+      display: inline-block;
+      text-decoration: none;
+      border-radius: 8px;
+      padding: 0.65rem 1rem;
+      font-weight: 600;
+      border: 1px solid transparent;
+      cursor: pointer;
+      font-size: 1rem;
+    }
+    .btn-primary { background: #3b82f6; color: #ffffff; }
+    .btn-ghost { background: transparent; border-color: #64748b; color: #e2e8f0; }
+    label { display: block; font-size: 0.85rem; color: #94a3b8; margin-bottom: 0.35rem; }
+    input[type="password"] {
+      width: 100%;
+      padding: 0.5rem 0.65rem;
+      border-radius: 8px;
+      border: 1px solid #64748b;
+      background: #0f172a;
+      color: #e2e8f0;
+      margin-bottom: 0.75rem;
+    }
+    .note { font-size: 0.8rem; color: #94a3b8; margin-top: 1rem; }
+    .nav { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; align-items: center; }
+    .nav span { color: #94a3b8; font-size: 0.9rem; }
+    .hidden { display: none !important; }
+  </style>
+</head>
+<body>
+  <main class="home-card">
+    <h1>Python Editor</h1>
+    <div id="auth-nav" class="nav">
+      <span id="auth-greeting" class="hidden"></span>
+      <a class="btn btn-ghost hidden" id="link-login" href="/login">Sign in</a>
+      <a class="btn btn-ghost hidden" id="link-register" href="/register">Register</a>
+      <button type="button" class="btn btn-ghost hidden" id="btn-logout">Sign out</button>
+    </div>
+    <p>Edit and store files on the server. Python runs in your browser with <a href="https://pyodide.org/" style="color:#93c5fd">Pyodide</a>.</p>
+    <div id="optional-api-key">
+      <p>If you use <code style="color:#fcd34d">EDITOR_API_KEY</code> (without user login), store it here for API calls from this browser tab:</p>
+      <label for="api-key">API key (optional)</label>
+      <input id="api-key" type="password" autocomplete="off" placeholder="Leave blank if not used" />
+      <p class="note">The key is kept in <code>sessionStorage</code>. You can also use <code>?api_key=…</code> on the editor URL.</p>
+    </div>
+    <a class="btn btn-primary" href="/editor" id="open-editor">Open Editor</a>
+  </main>
+  <script>
+    const storageKey = 'python-editor.api_key';
+    const input = document.getElementById('api-key');
+    const openLink = document.getElementById('open-editor');
+
+    async function refreshAuthNav() {
+      const st = await fetch('/api/auth/status');
+      const status = await st.json();
+      const loginEl = document.getElementById('link-login');
+      const regEl = document.getElementById('link-register');
+      const outEl = document.getElementById('btn-logout');
+      const greet = document.getElementById('auth-greeting');
+      const optionalKey = document.getElementById('optional-api-key');
+      if (!status.auth_enabled) {
+        loginEl.classList.add('hidden');
+        regEl.classList.add('hidden');
+        outEl.classList.add('hidden');
+        greet.classList.add('hidden');
+        return;
+      }
+      loginEl.classList.remove('hidden');
+      if (status.register_open) {
+        regEl.classList.remove('hidden');
+      }
+      const me = await fetch('/api/auth/me', { credentials: 'include' });
+      if (me.ok) {
+        const j = await me.json();
+        greet.textContent = `Signed in as ${j.user.username}`;
+        greet.classList.remove('hidden');
+        loginEl.classList.add('hidden');
+        regEl.classList.add('hidden');
+        outEl.classList.remove('hidden');
+        if (optionalKey) optionalKey.classList.add('hidden');
+      } else {
+        outEl.classList.add('hidden');
+        greet.classList.add('hidden');
+      }
+    }
+
+    document.getElementById('btn-logout').addEventListener('click', async () => {
+      await fetch('/api/auth/logout', { method: 'POST', credentials: 'include' });
+      window.location.reload();
+    });
+
+    try {
+      const params = new URLSearchParams(window.location.search);
+      const fromQuery = params.get('api_key');
+      if (fromQuery) {
+        sessionStorage.setItem(storageKey, fromQuery);
+      }
+      const existing = sessionStorage.getItem(storageKey);
+      if (existing) {
+        input.value = existing;
+      }
+    } catch (_e) {}
+    openLink.addEventListener('click', () => {
+      try {
+        const v = input.value.trim();
+        if (v) {
+          sessionStorage.setItem(storageKey, v);
+        } else {
+          sessionStorage.removeItem(storageKey);
+        }
+      } catch (_e) {}
+    });
+    refreshAuthNav();
+  </script>
+</body>
+</html>
diff --git a/src/static/index.html b/src/static/index.html
new file mode 100644
index 0000000..564fbcc
--- /dev/null
+++ b/src/static/index.html
@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Python Editor</title>
+  <link rel="icon" href="data:,">
+  <link rel="stylesheet" href="/static/styles.css?v=6">
+</head>
+<body>
+  <div class="container">
+    <div class="sidebar">
+      <div class="sidebar-header">
+        <h3>Files</h3>
+        <div class="sidebar-actions">
+          <button id="new-file-btn" title="New File">📄</button>
+          <button id="new-folder-btn" title="New Folder">📁+</button>
+          <button id="delete-selected-btn" title="Delete Selected">🗑️</button>
+          <button id="refresh-btn" title="Refresh">🔄</button>
+        </div>
+      </div>
+      <div class="file-tree" id="file-tree">
+        <div class="loading">Loading files...</div>
+      </div>
+    </div>
+
+    <div class="main-content">
+      <div class="editor-header">
+        <div class="file-info">
+          <span id="save-status" class="save-status"></span>
+          <span class="runtime-hint" title="Python runs locally in your browser via Pyodide; completions use Jedi in the same runtime.">Browser · Pyodide</span>
+        </div>
+        <div class="mode-toggle">
+          <a id="home-btn" class="mode-btn active" href="/">Home</a>
+        </div>
+        <div class="editor-actions">
+          <button id="run-btn" disabled>Run Python</button>
+          <button id="stop-btn" disabled>Stop</button>
+          <select id="run-file-select" title="Script to run">
+            <option value="">Run active file</option>
+          </select>
+        </div>
+      </div>
+
+      <div id="tabs" class="tabs"></div>
+
+      <div class="editor-container">
+        <div id="editor"></div>
+        <div id="completion-dropdown" class="completion-dropdown"></div>
+      </div>
+
+      <div class="console-container">
+        <div class="console-header">Console Output</div>
+        <pre id="console-output" class="console-output"></pre>
+      </div>
+    </div>
+  </div>
+
+  <div id="new-file-modal" class="modal">
+    <div class="modal-content">
+      <h3>Create New File</h3>
+      <input type="text" id="new-filename" placeholder="Enter filename (e.g., example.txt)" />
+      <div class="modal-actions">
+        <button id="create-file-btn">Create</button>
+        <button id="cancel-create-btn">Cancel</button>
+      </div>
+    </div>
+  </div>
+
+  <script type="module" src="/static/script.js?v=10"></script>
+</body>
+</html>
diff --git a/src/static/login.html b/src/static/login.html
new file mode 100644
index 0000000..8e966f9
--- /dev/null
+++ b/src/static/login.html
@@ -0,0 +1,120 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Sign in — Python Editor</title>
+  <link rel="icon" href="data:,">
+  <style>
+    * { box-sizing: border-box; }
+    body {
+      margin: 0;
+      min-height: 100vh;
+      display: grid;
+      place-items: center;
+      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+      background: linear-gradient(135deg, #0f172a, #1e293b);
+      color: #e2e8f0;
+    }
+    .card {
+      width: min(400px, 92vw);
+      background: rgba(15, 23, 42, 0.85);
+      border: 1px solid rgba(148, 163, 184, 0.25);
+      border-radius: 14px;
+      padding: 2rem;
+    }
+    h1 { margin: 0 0 1rem 0; font-size: 1.4rem; }
+    label { display: block; font-size: 0.85rem; color: #94a3b8; margin-bottom: 0.35rem; }
+    input {
+      width: 100%;
+      padding: 0.55rem 0.65rem;
+      border-radius: 8px;
+      border: 1px solid #64748b;
+      background: #0f172a;
+      color: #e2e8f0;
+      margin-bottom: 1rem;
+    }
+    button {
+      width: 100%;
+      padding: 0.65rem;
+      border: none;
+      border-radius: 8px;
+      background: #3b82f6;
+      color: #fff;
+      font-weight: 600;
+      cursor: pointer;
+      margin-bottom: 0.75rem;
+    }
+    button:disabled { opacity: 0.6; cursor: not-allowed; }
+    .err { color: #fca5a5; font-size: 0.9rem; margin-bottom: 0.75rem; min-height: 1.2em; }
+    a { color: #93c5fd; }
+    .links { font-size: 0.9rem; margin-top: 1rem; }
+  </style>
+</head>
+<body>
+  <main class="card">
+    <h1>Sign in</h1>
+    <div id="err" class="err"></div>
+    <form id="form">
+      <label for="username">Username</label>
+      <input id="username" name="username" autocomplete="username" required />
+      <label for="password">Password</label>
+      <input id="password" type="password" name="password" autocomplete="current-password" required />
+      <button type="submit" id="submit">Sign in</button>
+    </form>
+    <div class="links">
+      <a href="/">Home</a>
+      · <a id="register-link" href="/register">Create account</a>
+    </div>
+  </main>
+  <script>
+    const params = new URLSearchParams(window.location.search);
+    const next = params.get("next") || "/editor";
+
+    (async function checkStatus() {
+      try {
+        const r = await fetch("/api/auth/status");
+        const s = await r.json();
+        if (!s.auth_enabled) {
+          document.getElementById("err").textContent = "Sign-in is disabled (AUTH_ENABLED is not set).";
+          document.getElementById("form").style.display = "none";
+        }
+        if (!s.register_open) {
+          const link = document.getElementById("register-link");
+          link.style.display = "none";
+        }
+      } catch (_e) {}
+    })();
+
+    document.getElementById("form").addEventListener("submit", async (e) => {
+      e.preventDefault();
+      const err = document.getElementById("err");
+      const btn = document.getElementById("submit");
+      err.textContent = "";
+      btn.disabled = true;
+      try {
+        const body = {
+          username: document.getElementById("username").value.trim(),
+          password: document.getElementById("password").value,
+        };
+        const res = await fetch("/api/auth/login", {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          credentials: "include",
+          body: JSON.stringify(body),
+        });
+        if (!res.ok) {
+          const j = await res.json().catch(() => ({}));
+          err.textContent = j.detail || res.statusText || "Login failed";
+          return;
+        }
+        window.location.href = next.startsWith("/") ? next : "/editor";
+      } catch (ex) {
+        err.textContent = String(ex.message || ex);
+      } finally {
+        btn.disabled = false;
+      }
+    });
+  </script>
+</body>
+</html>
diff --git a/src/static/pyodide-worker.js b/src/static/pyodide-worker.js
new file mode 100644
index 0000000..5d36e34
--- /dev/null
+++ b/src/static/pyodide-worker.js
@@ -0,0 +1,122 @@
+/* global importScripts, loadPyodide, self */
+importScripts('https://cdn.jsdelivr.net/pyodide/v0.26.4/full/pyodide.js');
+
+const PYODIDE_INDEX_URL = 'https://cdn.jsdelivr.net/pyodide/v0.26.4/full/';
+
+let pyodide = null;
+let loadingPromise = null;
+
+async function ensurePyodide() {
+  if (pyodide) {
+    return pyodide;
+  }
+  if (!loadingPromise) {
+    loadingPromise = (async () => {
+      const p = await loadPyodide({ indexURL: PYODIDE_INDEX_URL });
+      p.setStdout({
+        batched: (txt) => self.postMessage({ type: 'io', stream: 'stdout', text: txt }),
+      });
+      p.setStderr({
+        batched: (txt) => self.postMessage({ type: 'io', stream: 'stderr', text: txt }),
+      });
+      await p.loadPackage('micropip');
+      await p.runPythonAsync(`
+import micropip
+await micropip.install("jedi")
+`);
+      return p;
+    })();
+  }
+  pyodide = await loadingPromise;
+  return pyodide;
+}
+
+self.onmessage = async (event) => {
+  const { id, type, payload } = event.data || {};
+  try {
+    if (type === 'init') {
+      await ensurePyodide();
+      self.postMessage({ id, type: 'init', ok: true });
+      return;
+    }
+
+    const p = await ensurePyodide();
+
+    if (type === 'complete') {
+      const rel = String(payload.path || 'scratch.py').replace(/^\/+/, '');
+      const vpath = `/workspace/${rel}`;
+      p.globals.set('__cm_code', String(payload.content ?? ''));
+      p.globals.set('__cm_path', vpath);
+      p.globals.set('__cm_line', Number(payload.line) || 1);
+      p.globals.set('__cm_col', Number(payload.column) || 0);
+      p.globals.set('__cm_max', Math.min(100, Math.max(1, Number(payload.max_results) || 20)));
+      p.globals.set('__cm_extra_json', JSON.stringify(payload.extra_files || {}));
+      const raw = p.runPython(`
+import json, os
+import jedi
+
+extra = json.loads(__cm_extra_json)
+os.makedirs("/workspace", exist_ok=True)
+for rel_path, body in extra.items():
+    rel_path = str(rel_path).lstrip("/")
+    full = os.path.join("/workspace", rel_path)
+    os.makedirs(os.path.dirname(full), exist_ok=True)
+    with open(full, "w", encoding="utf-8") as fh:
+        fh.write(str(body))
+os.makedirs(os.path.dirname(__cm_path), exist_ok=True)
+with open(__cm_path, "w", encoding="utf-8") as fh:
+    fh.write(__cm_code)
+proj = jedi.Project("/workspace")
+s = jedi.Script(code=__cm_code, path=__cm_path, project=proj)
+items = s.complete(line=__cm_line, column=__cm_col)
+out = [{"name": i.name, "type": i.type, "complete": i.complete} for i in items[:__cm_max]]
+json.dumps(out)
+`);
+      const completions = JSON.parse(String(raw));
+      self.postMessage({ id, type: 'complete', ok: true, completions });
+      return;
+    }
+
+    if (type === 'run') {
+      const files = payload.files && typeof payload.files === 'object' ? payload.files : {};
+      const mainRel = String(payload.mainPath || '').replace(/^\/+/, '');
+      const argsList = Array.isArray(payload.args) ? payload.args.map(String) : [];
+      p.globals.set('__run_files_json', JSON.stringify(files));
+      p.globals.set('__run_main', `/workspace/${mainRel}`);
+      p.globals.set('__run_args', p.toPy(argsList));
+      await p.runPythonAsync(`
+import json, os, shutil, sys, runpy
+
+files = json.loads(__run_files_json)
+shutil.rmtree('/workspace', ignore_errors=True)
+os.makedirs('/workspace', exist_ok=True)
+for rel, body in files.items():
+    rel = str(rel).lstrip("/")
+    full = os.path.join("/workspace", rel)
+    os.makedirs(os.path.dirname(full), exist_ok=True)
+    with open(full, "w", encoding="utf-8") as fh:
+        fh.write(str(body))
+
+for entry in ("/workspace/lib", "/workspace"):
+    if entry not in sys.path:
+        sys.path.insert(0, entry)
+
+os.chdir("/workspace")
+main = __run_main
+sys.argv = [main] + list(__run_args)
+runpy.run_path(main, run_name="__main__")
+`);
+      self.postMessage({ id, type: 'run', ok: true });
+      return;
+    }
+
+    self.postMessage({ id, type, ok: false, error: `Unknown message type: ${type}` });
+  } catch (err) {
+    self.postMessage({
+      id,
+      type,
+      ok: false,
+      error: err && err.message ? String(err.message) : String(err),
+    });
+  }
+};
diff --git a/src/static/register.html b/src/static/register.html
new file mode 100644
index 0000000..633e08e
--- /dev/null
+++ b/src/static/register.html
@@ -0,0 +1,113 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Register — Python Editor</title>
+  <link rel="icon" href="data:,">
+  <style>
+    * { box-sizing: border-box; }
+    body {
+      margin: 0;
+      min-height: 100vh;
+      display: grid;
+      place-items: center;
+      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
+      background: linear-gradient(135deg, #0f172a, #1e293b);
+      color: #e2e8f0;
+    }
+    .card {
+      width: min(400px, 92vw);
+      background: rgba(15, 23, 42, 0.85);
+      border: 1px solid rgba(148, 163, 184, 0.25);
+      border-radius: 14px;
+      padding: 2rem;
+    }
+    h1 { margin: 0 0 1rem 0; font-size: 1.4rem; }
+    label { display: block; font-size: 0.85rem; color: #94a3b8; margin-bottom: 0.35rem; }
+    input {
+      width: 100%;
+      padding: 0.55rem 0.65rem;
+      border-radius: 8px;
+      border: 1px solid #64748b;
+      background: #0f172a;
+      color: #e2e8f0;
+      margin-bottom: 1rem;
+    }
+    button {
+      width: 100%;
+      padding: 0.65rem;
+      border: none;
+      border-radius: 8px;
+      background: #3b82f6;
+      color: #fff;
+      font-weight: 600;
+      cursor: pointer;
+      margin-bottom: 0.75rem;
+    }
+    button:disabled { opacity: 0.6; cursor: not-allowed; }
+    .err { color: #fca5a5; font-size: 0.9rem; margin-bottom: 0.75rem; min-height: 1.2em; }
+    .hint { font-size: 0.8rem; color: #94a3b8; margin-bottom: 1rem; }
+    a { color: #93c5fd; }
+  </style>
+</head>
+<body>
+  <main class="card">
+    <h1>Create account</h1>
+    <p class="hint">Username: letters, numbers, underscore (3–64). Password: at least 8 characters.</p>
+    <div id="err" class="err"></div>
+    <form id="form">
+      <label for="username">Username</label>
+      <input id="username" name="username" autocomplete="username" required />
+      <label for="password">Password</label>
+      <input id="password" type="password" name="password" autocomplete="new-password" required />
+      <button type="submit" id="submit">Register</button>
+    </form>
+    <p><a href="/login">Sign in</a> · <a href="/">Home</a></p>
+  </main>
+  <script>
+    (async function checkStatus() {
+      try {
+        const r = await fetch("/api/auth/status");
+        const s = await r.json();
+        if (!s.auth_enabled) {
+          document.getElementById("err").textContent = "Registration is disabled (AUTH_ENABLED is not set).";
+          document.getElementById("form").style.display = "none";
+        } else if (!s.register_open) {
+          document.getElementById("err").textContent = "Public registration is closed. Ask an administrator.";
+          document.getElementById("form").style.display = "none";
+        }
+      } catch (_e) {}
+    })();
+
+    document.getElementById("form").addEventListener("submit", async (e) => {
+      e.preventDefault();
+      const err = document.getElementById("err");
+      const btn = document.getElementById("submit");
+      err.textContent = "";
+      btn.disabled = true;
+      try {
+        const body = {
+          username: document.getElementById("username").value.trim(),
+          password: document.getElementById("password").value,
+        };
+        const res = await fetch("/api/auth/register", {
+          method: "POST",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify(body),
+        });
+        if (!res.ok) {
+          const j = await res.json().catch(() => ({}));
+          err.textContent = typeof j.detail === "string" ? j.detail : JSON.stringify(j.detail) || res.statusText;
+          return;
+        }
+        window.location.href = "/login?next=/editor";
+      } catch (ex) {
+        err.textContent = String(ex.message || ex);
+      } finally {
+        btn.disabled = false;
+      }
+    });
+  </script>
+</body>
+</html>
diff --git a/src/static/script.js b/src/static/script.js
new file mode 100644
index 0000000..3c95c96
--- /dev/null
+++ b/src/static/script.js
@@ -0,0 +1,1505 @@
+import { EditorView, basicSetup } from "/static/codemirror.bundle.mjs";
+
+class TextEditor {
+  constructor() {
+    this.sessionStorageKey = 'python-editor.editor.session.v1';
+    this.pyWorker = null;
+    this.pyWorkerMsgId = 0;
+    this.pyWorkerHandlers = new Map();
+    this.pyodideInited = false;
+    this.pyRunGeneration = 0;
+    this.editor = null;
+    this.currentFilePath = null;
+    this.isModified = false;
+    this.selectedPath = null;
+    this.ignoreNextChange = false;
+    this.expandedDirs = new Set([""]);
+    this.directoryCache = new Map();
+    this.openTabs = [];
+    this.activeTabPath = null;
+    this.currentFileReadOnly = false;
+    this.selectedIsDirectory = false;
+    this.isPythonRunning = false;
+    this.consolePendingText = '';
+    this.consoleFlushTimer = null;
+    this.completionItems = [];
+    this.completionIndex = 0;
+    this.completionOpen = false;
+    this.completionRequestId = 0;
+    this.draggedItemPath = null;
+    this.draggedItemIsDirectory = false;
+    this.dragHoverExpandTimer = null;
+    this.dragHoverTargetPath = null;
+    this.savedSession = null;
+
+    this.init();
+  }
+
+  init() {
+    try {
+      const fromQuery = new URLSearchParams(window.location.search).get('api_key');
+      if (fromQuery) {
+        sessionStorage.setItem('python-editor.api_key', fromQuery);
+      }
+    } catch (_error) {
+      // Ignore query / storage failures.
+    }
+    this.loadSessionState();
+    this.setupEditor();
+    this.setupEventListeners();
+    this.updateRunButtonState();
+    this.loadInitialDirectoryState().then(() => this.restoreSessionTabs());
+  }
+
+  apiFetch(url, init = {}) {
+    const next = { ...init };
+    const headers = new Headers(init.headers || {});
+    const key = sessionStorage.getItem('python-editor.api_key');
+    if (key) {
+      headers.set('Authorization', `Bearer ${key}`);
+    }
+    next.headers = headers;
+    next.credentials = 'include';
+    return fetch(url, next);
+  }
+
+  disposePyWorker() {
+    for (const [, pending] of this.pyWorkerHandlers) {
+      pending.reject(new Error('Worker terminated'));
+    }
+    this.pyWorkerHandlers.clear();
+    if (this.pyWorker) {
+      this.pyWorker.terminate();
+      this.pyWorker = null;
+    }
+    this.pyodideInited = false;
+  }
+
+  ensurePyWorker() {
+    if (!this.pyWorker) {
+      const worker = new Worker('/static/pyodide-worker.js');
+      this.pyWorker = worker;
+      worker.onmessage = (event) => this.handlePyWorkerMessage(event);
+    }
+    return this.pyWorker;
+  }
+
+  handlePyWorkerMessage(event) {
+    const data = event.data;
+    if (!data || typeof data !== 'object') {
+      return;
+    }
+    if (data.type === 'io') {
+      if (this.isPythonRunning) {
+        const prefix = data.stream === 'stderr' ? '[stderr] ' : '';
+        this.appendConsoleOutput([`${prefix}${data.text || ''}`]);
+      }
+      return;
+    }
+    const { id } = data;
+    if (id == null || !this.pyWorkerHandlers.has(id)) {
+      return;
+    }
+    const pending = this.pyWorkerHandlers.get(id);
+    this.pyWorkerHandlers.delete(id);
+    if (data.ok) {
+      pending.resolve(data);
+    } else {
+      pending.reject(new Error(data.error || 'Pyodide worker error'));
+    }
+  }
+
+  callPyWorker(type, payload) {
+    return new Promise((resolve, reject) => {
+      const worker = this.ensurePyWorker();
+      const id = ++this.pyWorkerMsgId;
+      this.pyWorkerHandlers.set(id, { resolve, reject });
+      worker.postMessage({ id, type, payload });
+    });
+  }
+
+  async ensurePyodideReady() {
+    if (this.pyodideInited) {
+      return;
+    }
+    await this.callPyWorker('init', {});
+    this.pyodideInited = true;
+  }
+
+  loadSessionState() {
+    try {
+      const raw = localStorage.getItem(this.sessionStorageKey);
+      if (!raw) return;
+      const session = JSON.parse(raw);
+      this.savedSession = session;
+    } catch (_error) {
+      this.savedSession = null;
+    }
+  }
+
+  saveSessionState() {
+    try {
+      const runFileSelect = document.getElementById('run-file-select');
+      const session = {
+        openTabPaths: this.openTabs.map((tab) => tab.path),
+        activeTabPath: this.activeTabPath,
+        selectedRunFile: runFileSelect ? runFileSelect.value : '',
+        expandedDirs: Array.from(this.expandedDirs || []),
+        selectedPath: this.selectedPath || '',
+        selectedIsDirectory: Boolean(this.selectedIsDirectory)
+      };
+      localStorage.setItem(this.sessionStorageKey, JSON.stringify(session));
+    } catch (_error) {
+      // Ignore storage failures.
+    }
+  }
+
+  async restoreSessionTabs() {
+    const session = this.savedSession;
+    this.savedSession = null;
+    if (!session) {
+      return;
+    }
+    await this.restoreExplorerState(session);
+    if (!Array.isArray(session.openTabPaths) || session.openTabPaths.length === 0) {
+      return;
+    }
+    for (const path of session.openTabPaths) {
+      await this.openFile(path);
+    }
+    if (session.activeTabPath && this.findTab(session.activeTabPath)) {
+      this.switchToTab(session.activeTabPath);
+    }
+    const runFileSelect = document.getElementById('run-file-select');
+    if (runFileSelect && typeof session.selectedRunFile === 'string') {
+      runFileSelect.value = session.selectedRunFile;
+    }
+    this.saveSessionState();
+  }
+
+  async restoreExplorerState(session) {
+    const expanded = Array.isArray(session.expandedDirs)
+      ? session.expandedDirs.filter((path) => typeof path === 'string')
+      : [];
+    this.expandedDirs = new Set(expanded.length ? expanded : ['']);
+    if (!this.expandedDirs.has('')) {
+      this.expandedDirs.add('');
+    }
+    this.selectedPath = typeof session.selectedPath === 'string' ? session.selectedPath : '';
+    this.selectedIsDirectory = Boolean(session.selectedIsDirectory);
+
+    for (const path of this.expandedDirs) {
+      if (!path || this.directoryCache.has(path)) continue;
+      await this.loadDirectory(path, { suppressError: true });
+    }
+    this.renderFileTree();
+  }
+
+  getVisibleTopLevelNames() {
+    return new Set(['code', 'lib']);
+  }
+
+  getDefaultEditableRoot() {
+    return 'code';
+  }
+
+  async loadInitialDirectoryState() {
+    await this.loadDirectory('');
+    await this.ensureFolderExists('code');
+    await this.ensureFolderExists('lib');
+    this.selectedPath = 'code';
+    this.selectedIsDirectory = true;
+    this.expandedDirs.add('code');
+    await this.loadDirectory('code', { suppressError: true });
+    await this.loadDirectory('lib', { suppressError: true });
+    this.renderFileTree();
+  }
+
+  async ensureFolderExists(folderPath) {
+    try {
+      const existing = await this.apiFetch(`/api/files?path=${encodeURIComponent(folderPath)}`);
+      if (existing.ok) {
+        return true;
+      }
+      if (existing.status && existing.status !== 404) {
+        return false;
+      }
+      const response = await this.apiFetch(`/api/folder/new/${encodeURIComponent(folderPath)}`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ path: folderPath })
+      });
+      return response.ok;
+    } catch (_error) {
+      return false;
+    }
+  }
+
+  getTreeRootPath() {
+    return '';
+  }
+
+  normalizeRelativePathInput(pathValue) {
+    let normalized = (pathValue || '').trim().replace(/^\/+/, '');
+    const parts = normalized.split('/').filter(Boolean);
+    while (parts.length >= 2 && parts[0] === 'code' && parts[1] === 'code') {
+      parts.shift();
+    }
+    return parts.join('/');
+  }
+
+  resetDirectoryState() {
+    this.directoryCache.clear();
+    this.expandedDirs = new Set(['']);
+  }
+
+  setupEditor() {
+    this.editor = new EditorView({
+      doc: '',
+      extensions: [basicSetup],
+      parent: document.getElementById('editor')
+    });
+
+    this.editor.dom.addEventListener('keydown', (event) => {
+      if (this.currentFileReadOnly) {
+        const blocksEditKey = event.key.length === 1 || ['Backspace', 'Delete', 'Enter', 'Tab'].includes(event.key);
+        if (blocksEditKey && !event.ctrlKey && !event.metaKey && !event.altKey) {
+          event.preventDefault();
+          return;
+        }
+      }
+
+      if (this.completionOpen) {
+        if (event.key === 'ArrowDown') {
+          event.preventDefault();
+          this.moveCompletionSelection(1);
+          return;
+        }
+        if (event.key === 'ArrowUp') {
+          event.preventDefault();
+          this.moveCompletionSelection(-1);
+          return;
+        }
+        if (event.key === 'Enter' || event.key === 'Tab') {
+          event.preventDefault();
+          this.applySelectedCompletion();
+          return;
+        }
+        if (event.key === 'Escape') {
+          event.preventDefault();
+          this.hideCompletionDropdown();
+          return;
+        }
+      }
+
+      if ((event.ctrlKey || event.metaKey) && event.key.toLowerCase() === 's') {
+        event.preventDefault();
+        this.saveFile();
+        return;
+      }
+
+      if ((event.ctrlKey || event.metaKey) && event.code === 'Space') {
+        event.preventDefault();
+        this.showCompletionDropdown();
+        return;
+      }
+
+      if (event.key === 'Tab') {
+        event.preventDefault();
+        const selection = this.editor.state.selection.main;
+        const from = Math.min(selection.from, selection.to);
+        const to = Math.max(selection.from, selection.to);
+        const indentText = '  ';
+        this.editor.dispatch({
+          changes: { from, to, insert: indentText },
+          selection: { anchor: from + indentText.length }
+        });
+      }
+    });
+
+    this.editor.dispatch = ((dispatch) => (transaction) => {
+      dispatch.call(this.editor, transaction);
+      if (!this.ignoreNextChange && transaction.docChanged) {
+        this.hideCompletionDropdown();
+        this.updateActiveTabContent();
+        this.markAsModified();
+      }
+    })(this.editor.dispatch);
+  }
+
+  getCursorLineAndColumn() {
+    const cursor = this.editor.state.selection.main.head;
+    const lineInfo = this.editor.state.doc.lineAt(cursor);
+    return {
+      line: lineInfo.number,
+      column: cursor - lineInfo.from
+    };
+  }
+
+  getCurrentPrefix(cursor) {
+    const content = this.editor.state.doc.toString();
+    let start = cursor;
+    while (start > 0 && /[A-Za-z0-9_]/.test(content[start - 1])) {
+      start -= 1;
+    }
+    return {
+      prefixStart: start,
+      prefix: content.slice(start, cursor)
+    };
+  }
+
+  async fetchCompletions() {
+    if (!this.currentFilePath || !this.currentFilePath.toLowerCase().endsWith('.py')) {
+      return [];
+    }
+
+    const { line, column } = this.getCursorLineAndColumn();
+    const requestId = ++this.completionRequestId;
+
+    try {
+      await this.ensurePyodideReady();
+      const extraFiles = {};
+      for (const tab of this.openTabs) {
+        if (tab.path && tab.path.toLowerCase().endsWith('.py')) {
+          extraFiles[tab.path] = tab.content;
+        }
+      }
+      const data = await this.callPyWorker('complete', {
+        path: this.currentFilePath,
+        content: this.editor.state.doc.toString(),
+        line,
+        column,
+        max_results: 20,
+        extra_files: extraFiles
+      });
+      if (requestId !== this.completionRequestId) {
+        return [];
+      }
+      return Array.isArray(data.completions) ? data.completions : [];
+    } catch (_error) {
+      return [];
+    }
+  }
+
+  renderCompletionDropdown() {
+    const dropdown = document.getElementById('completion-dropdown');
+    if (!dropdown) return;
+
+    dropdown.innerHTML = this.completionItems.map((item, index) => {
+      const activeClass = index === this.completionIndex ? 'active' : '';
+      const itemType = item.type || 'value';
+      return `
+        <div class="completion-item ${activeClass}" data-index="${index}">
+          <span class="completion-name">${item.name}</span>
+          <span class="completion-type">${itemType}</span>
+        </div>
+      `;
+    }).join('');
+
+    dropdown.querySelectorAll('.completion-item').forEach((node) => {
+      node.addEventListener('mousedown', (event) => {
+        event.preventDefault();
+        this.completionIndex = Number(node.dataset.index || 0);
+        this.applySelectedCompletion();
+      });
+    });
+  }
+
+  positionCompletionDropdown() {
+    const dropdown = document.getElementById('completion-dropdown');
+    if (!dropdown) return;
+    const cursor = this.editor.state.selection.main.head;
+    const coords = this.editor.coordsAtPos(cursor);
+    const editorRect = this.editor.dom.getBoundingClientRect();
+    if (!coords || !editorRect) return;
+    dropdown.style.top = `${coords.bottom - editorRect.top + 4}px`;
+    dropdown.style.left = `${coords.left - editorRect.left}px`;
+  }
+
+  moveCompletionSelection(direction) {
+    if (!this.completionOpen || this.completionItems.length === 0) return;
+    const total = this.completionItems.length;
+    this.completionIndex = (this.completionIndex + direction + total) % total;
+    this.renderCompletionDropdown();
+  }
+
+  hideCompletionDropdown() {
+    const dropdown = document.getElementById('completion-dropdown');
+    if (dropdown) {
+      dropdown.style.display = 'none';
+      dropdown.innerHTML = '';
+    }
+    this.completionOpen = false;
+    this.completionItems = [];
+    this.completionIndex = 0;
+  }
+
+  async showCompletionDropdown() {
+    const dropdown = document.getElementById('completion-dropdown');
+    if (!dropdown) return;
+
+    const completions = await this.fetchCompletions();
+    if (completions.length === 0) {
+      this.hideCompletionDropdown();
+      return;
+    }
+
+    const cursor = this.editor.state.selection.main.head;
+    const { prefix } = this.getCurrentPrefix(cursor);
+    const ranked = completions
+      .filter((item) => item && typeof item.name === 'string')
+      .sort((a, b) => {
+        const aStarts = prefix && a.name.startsWith(prefix) ? 1 : 0;
+        const bStarts = prefix && b.name.startsWith(prefix) ? 1 : 0;
+        return bStarts - aStarts;
+      });
+
+    if (ranked.length === 0) {
+      this.hideCompletionDropdown();
+      return;
+    }
+
+    this.completionItems = ranked;
+    this.completionIndex = 0;
+    this.completionOpen = true;
+    this.renderCompletionDropdown();
+    this.positionCompletionDropdown();
+    dropdown.style.display = 'block';
+  }
+
+  applySelectedCompletion() {
+    if (!this.completionOpen || this.completionItems.length === 0) return;
+    const selected = this.completionItems[this.completionIndex];
+    if (!selected || typeof selected.name !== 'string') return;
+
+    const cursor = this.editor.state.selection.main.head;
+    const { prefixStart } = this.getCurrentPrefix(cursor);
+    const isCallable = selected.type === 'function' || selected.type === 'method';
+    const insertText = isCallable ? `${selected.name}()` : selected.name;
+    const cursorOffset = isCallable ? selected.name.length + 1 : insertText.length;
+    this.editor.dispatch({
+      changes: {
+        from: prefixStart,
+        to: cursor,
+        insert: insertText
+      },
+      selection: { anchor: prefixStart + cursorOffset }
+    });
+    this.hideCompletionDropdown();
+  }
+
+  setupEventListeners() {
+    const persistSession = () => {
+      this.saveSessionState();
+    };
+    window.addEventListener('beforeunload', persistSession);
+    window.addEventListener('pagehide', persistSession);
+
+    document.addEventListener('keydown', (event) => {
+      if (this.completionOpen) {
+        if (event.key === 'Enter') {
+          event.preventDefault();
+          this.applySelectedCompletion();
+          return;
+        }
+      }
+      if (event.key === 'F5') {
+        event.preventDefault();
+        this.runPython();
+        return;
+      }
+      const isMod = event.ctrlKey || event.metaKey;
+      if (!isMod) return;
+      const key = event.key.toLowerCase();
+      if (event.code === 'Space') {
+        event.preventDefault();
+        this.showCompletionDropdown();
+        return;
+      }
+      if (key === 's') {
+        event.preventDefault();
+        this.saveFile();
+        return;
+      }
+      if (key === 'z') {
+        event.preventDefault();
+        this.performUndo();
+        return;
+      }
+      if (key === 'y') {
+        event.preventDefault();
+        this.performRedo();
+      }
+    });
+
+    document.addEventListener('mousedown', (event) => {
+      if (!this.completionOpen) return;
+      const dropdown = document.getElementById('completion-dropdown');
+      if (!dropdown) return;
+      if (!dropdown.contains(event.target)) {
+        this.hideCompletionDropdown();
+      }
+    });
+
+    document.getElementById('refresh-btn').addEventListener('click', () => {
+      this.resetDirectoryState();
+      this.loadDirectory(this.getTreeRootPath());
+    });
+
+    document.getElementById('new-file-btn').addEventListener('click', () => {
+      this.showNewFileModal();
+    });
+
+    document.getElementById('new-folder-btn').addEventListener('click', () => {
+      this.createNewFolder();
+    });
+
+    document.getElementById('delete-selected-btn').addEventListener('click', () => {
+      this.deleteSelected();
+    });
+
+    document.getElementById('run-btn').addEventListener('click', () => {
+      this.runPython();
+    });
+
+    document.getElementById('stop-btn').addEventListener('click', () => {
+      this.stopPython();
+    });
+
+    document.getElementById('create-file-btn').addEventListener('click', () => {
+      this.createNewFile();
+    });
+
+    document.getElementById('cancel-create-btn').addEventListener('click', () => {
+      this.hideNewFileModal();
+    });
+
+    document.getElementById('new-filename').addEventListener('keypress', (e) => {
+      if (e.key === 'Enter') {
+        this.createNewFile();
+      }
+    });
+
+    document.getElementById('new-file-modal').addEventListener('click', (e) => {
+      if (e.target.id === 'new-file-modal') {
+        this.hideNewFileModal();
+      }
+    });
+
+    document.getElementById('home-btn').addEventListener('click', () => {
+      window.location.href = '/';
+    });
+
+    document.getElementById('run-file-select').addEventListener('change', (event) => {
+      const selectedPath = event.target.value;
+      if (!selectedPath) return;
+      const tab = this.findTab(selectedPath);
+      if (tab) {
+        this.switchToTab(selectedPath);
+      }
+      this.saveSessionState();
+    });
+
+  }
+
+  performUndo() {
+    document.execCommand('undo');
+  }
+
+  performRedo() {
+    document.execCommand('redo');
+  }
+
+  renderTabs() {
+    const tabsContainer = document.getElementById('tabs');
+    if (this.openTabs.length === 0) {
+      tabsContainer.innerHTML = '';
+      return;
+    }
+
+    tabsContainer.innerHTML = this.openTabs.map((tab) => {
+      const activeClass = tab.path === this.activeTabPath ? 'active' : '';
+      const modifiedMark = tab.isModified ? '*' : '';
+      const displayPath = tab.path.startsWith('code/') ? tab.path.slice('code/'.length) : tab.path;
+      return `
+        <div class="tab ${activeClass}" data-path="${tab.path}">
+          <span class="tab-title">${displayPath}${modifiedMark}</span>
+          <button class="tab-close" data-path="${tab.path}" title="Close tab">x</button>
+        </div>
+      `;
+    }).join('');
+
+    tabsContainer.querySelectorAll('.tab').forEach((tabElement) => {
+      tabElement.addEventListener('click', (event) => {
+        if (event.target.classList.contains('tab-close')) {
+          return;
+        }
+        this.switchToTab(tabElement.dataset.path);
+      });
+    });
+
+    tabsContainer.querySelectorAll('.tab-close').forEach((closeButton) => {
+      closeButton.addEventListener('click', (event) => {
+        event.stopPropagation();
+        this.closeTab(closeButton.dataset.path);
+      });
+    });
+    this.renderRunFileSelect();
+    this.saveSessionState();
+  }
+
+  renderRunFileSelect() {
+    const select = document.getElementById('run-file-select');
+    if (!select) return;
+    const pythonTabs = this.openTabs
+      .map((tab) => tab.path)
+      .filter((path) => typeof path === 'string' && path.toLowerCase().endsWith('.py'));
+    const currentValue = select.value;
+    select.innerHTML = '<option value="">Run active file</option>';
+    pythonTabs.forEach((path) => {
+      const option = document.createElement('option');
+      option.value = path;
+      option.textContent = path.startsWith('code/') ? path.slice('code/'.length) : path;
+      if (path === currentValue || path === this.currentFilePath) {
+        option.selected = true;
+      }
+      select.appendChild(option);
+    });
+  }
+
+  findTab(path) {
+    return this.openTabs.find((tab) => tab.path === path);
+  }
+
+  isReadOnlyPath(path) {
+    return typeof path === 'string' && path.startsWith('lib/');
+  }
+
+  setEditorReadOnly(isReadOnly) {
+    this.currentFileReadOnly = Boolean(isReadOnly);
+    if (!this.editor || !this.editor.contentDOM) return;
+    this.editor.contentDOM.setAttribute('contenteditable', this.currentFileReadOnly ? 'false' : 'true');
+  }
+
+  updateActiveTabContent() {
+    if (!this.activeTabPath) return;
+    const tab = this.findTab(this.activeTabPath);
+    if (!tab) return;
+    tab.content = this.editor.state.doc.toString();
+    tab.isModified = true;
+    this.renderTabs();
+  }
+
+  switchToTab(path) {
+    this.hideCompletionDropdown();
+    const tab = this.findTab(path);
+    if (!tab) return;
+    this.activeTabPath = path;
+    this.currentFilePath = path;
+    this.ignoreNextChange = true;
+    this.editor.dispatch({
+      changes: {
+        from: 0,
+        to: this.editor.state.doc.length,
+        insert: tab.content
+      }
+    });
+    this.ignoreNextChange = false;
+    const currentFileEl = document.getElementById('current-file');
+    if (currentFileEl) currentFileEl.textContent = path;
+    this.setEditorReadOnly(this.isReadOnlyPath(path));
+    this.updateRunButtonState();
+    if (tab.isModified) {
+      this.markAsModified();
+    } else {
+      this.markAsSaved();
+    }
+    this.renderTabs();
+  }
+
+  closeTab(path) {
+    this.hideCompletionDropdown();
+    const index = this.openTabs.findIndex((tab) => tab.path === path);
+    if (index === -1) return;
+
+    const tab = this.openTabs[index];
+    if (tab.isModified && !confirm(`Close "${path}" with unsaved changes?`)) {
+      return;
+    }
+
+    this.openTabs.splice(index, 1);
+
+    if (this.activeTabPath === path) {
+      const nextTab = this.openTabs[index] || this.openTabs[index - 1];
+      if (nextTab) {
+        this.switchToTab(nextTab.path);
+      } else {
+        this.activeTabPath = null;
+        this.currentFilePath = null;
+        this.setEditorReadOnly(false);
+        this.ignoreNextChange = true;
+        this.editor.dispatch({
+          changes: {
+            from: 0,
+            to: this.editor.state.doc.length,
+            insert: ''
+          }
+        });
+        this.ignoreNextChange = false;
+        const currentFileEl = document.getElementById('current-file');
+        if (currentFileEl) currentFileEl.textContent = 'No file selected';
+        this.updateRunButtonState();
+        this.markAsSaved();
+      }
+    }
+
+    this.renderTabs();
+    this.saveSessionState();
+  }
+
+  async loadDirectory(path = "", options = {}) {
+    const { suppressError = false } = options;
+    try {
+      const response = await this.apiFetch(`/api/files?path=${encodeURIComponent(path)}`);
+      if (!response.ok) {
+        throw new Error(`Failed to load directory: ${response.statusText}`);
+      }
+      const data = await response.json();
+      this.directoryCache.set(path, data.files || []);
+      this.renderFileTree();
+      return true;
+    } catch (error) {
+      if (!suppressError) {
+        console.error('Error loading file tree:', error);
+        this.showError('Failed to load files');
+      }
+      return false;
+    }
+  }
+
+  renderFileTree() {
+    const fileTreeElement = document.getElementById('file-tree');
+    const treeRootPath = this.getTreeRootPath();
+    const rootLabel = '/';
+    let rootFiles = this.directoryCache.get(treeRootPath) || [];
+    if (!treeRootPath) {
+      const visibleNames = this.getVisibleTopLevelNames();
+      if (visibleNames) {
+        rootFiles = rootFiles.filter((file) => visibleNames.has(file.name));
+      }
+    }
+
+    if (rootFiles.length === 0) {
+      fileTreeElement.innerHTML = `
+        <div class="file-item directory root-drop ${this.selectedPath === treeRootPath ? "selected" : ""}" data-path="${treeRootPath}" data-is-directory="true">
+          <span class="file-icon">🗂️</span>
+          <span class="file-name">${rootLabel}</span>
+        </div>
+        <div class="loading">No files found</div>
+      `;
+    } else {
+      const initialDepth = treeRootPath ? 1 : 0;
+      fileTreeElement.innerHTML = `
+        <div class="file-item directory root-drop ${this.selectedPath === treeRootPath ? "selected" : ""}" data-path="${treeRootPath}" data-is-directory="true">
+          <span class="file-icon">🗂️</span>
+          <span class="file-name">${rootLabel}</span>
+        </div>
+        ${this.renderDirectoryHtml(treeRootPath, initialDepth, rootFiles)}
+      `;
+    }
+
+    fileTreeElement.querySelectorAll('.file-item').forEach((item) => {
+      item.addEventListener('click', async () => {
+        const path = item.dataset.path;
+        const isDirectory = item.dataset.isDirectory === 'true';
+        this.selectedPath = path;
+        this.selectedIsDirectory = isDirectory;
+
+        if (isDirectory && path) {
+          await this.toggleDirectory(path);
+        } else if (!isDirectory) {
+          this.openFile(path);
+        } else {
+          this.renderFileTree();
+        }
+      });
+    });
+
+    fileTreeElement.querySelectorAll('.file-item').forEach((item) => {
+      item.setAttribute('draggable', 'true');
+      item.addEventListener('dragstart', () => {
+        this.draggedItemPath = item.dataset.path || null;
+        this.draggedItemIsDirectory = item.dataset.isDirectory === 'true';
+        item.classList.add('dragging-file');
+      });
+      item.addEventListener('dragend', () => {
+        this.clearDragHoverExpand();
+        this.draggedItemPath = null;
+        this.draggedItemIsDirectory = false;
+        item.classList.remove('dragging-file');
+        fileTreeElement.querySelectorAll('.file-item.drag-target').forEach((node) => {
+          node.classList.remove('drag-target');
+        });
+      });
+    });
+
+    fileTreeElement.querySelectorAll('.file-item[data-is-directory="true"]').forEach((item) => {
+      item.addEventListener('dragover', (event) => {
+        if (!this.draggedItemPath) return;
+        event.preventDefault();
+        item.classList.add('drag-target');
+        const targetPath = item.dataset.path || "";
+        this.scheduleDragHoverExpand(targetPath);
+      });
+      item.addEventListener('dragleave', () => {
+        item.classList.remove('drag-target');
+        this.clearDragHoverExpand();
+      });
+      item.addEventListener('drop', async (event) => {
+        event.preventDefault();
+        item.classList.remove('drag-target');
+        this.clearDragHoverExpand();
+        const destination = item.dataset.path || "";
+        await this.movePathToFolder(this.draggedItemPath, this.draggedItemIsDirectory, destination);
+      });
+    });
+
+    fileTreeElement.addEventListener('dragover', (event) => {
+      if (!this.draggedItemPath) return;
+      const targetItem = event.target.closest('.file-item');
+      if (!targetItem) {
+        event.preventDefault();
+      }
+    });
+
+    fileTreeElement.addEventListener('drop', async (event) => {
+      const targetItem = event.target.closest('.file-item');
+      if (targetItem) return;
+      if (!this.draggedItemPath) return;
+      event.preventDefault();
+      this.clearDragHoverExpand();
+      const dropRoot = treeRootPath || this.getDefaultEditableRoot();
+      await this.movePathToFolder(this.draggedItemPath, this.draggedItemIsDirectory, dropRoot);
+    });
+  }
+
+  clearDragHoverExpand() {
+    if (this.dragHoverExpandTimer) {
+      clearTimeout(this.dragHoverExpandTimer);
+      this.dragHoverExpandTimer = null;
+    }
+    this.dragHoverTargetPath = null;
+  }
+
+  scheduleDragHoverExpand(targetPath) {
+    if (!targetPath || this.expandedDirs.has(targetPath)) {
+      this.clearDragHoverExpand();
+      return;
+    }
+    if (this.dragHoverTargetPath === targetPath && this.dragHoverExpandTimer) {
+      return;
+    }
+    this.clearDragHoverExpand();
+    this.dragHoverTargetPath = targetPath;
+    this.dragHoverExpandTimer = setTimeout(async () => {
+      if (!this.draggedItemPath || this.dragHoverTargetPath !== targetPath) return;
+      this.expandedDirs.add(targetPath);
+      if (!this.directoryCache.has(targetPath)) {
+        await this.loadDirectory(targetPath);
+      } else {
+        this.renderFileTree();
+      }
+      this.clearDragHoverExpand();
+    }, 500);
+  }
+
+  renderDirectoryHtml(basePath, depth, overrideFiles = null) {
+    const files = overrideFiles || this.directoryCache.get(basePath) || [];
+    let html = "";
+
+    for (const file of files) {
+      const fullPath = basePath ? `${basePath}/${file.name}` : file.name;
+      const isDir = file.is_directory;
+      const selectedClass = this.selectedPath === fullPath ? "selected" : "";
+      const indent = depth * 16;
+
+      if (isDir) {
+        const expanded = this.expandedDirs.has(fullPath);
+        html += `
+          <div class="file-item directory ${selectedClass}" data-path="${fullPath}" data-is-directory="true" style="padding-left: ${8 + indent}px">
+            <span class="file-icon">${expanded ? "📂" : "📁"}</span>
+            <span class="file-name">${file.name}</span>
+          </div>
+        `;
+        if (expanded) {
+          html += this.renderDirectoryHtml(fullPath, depth + 1);
+        }
+      } else {
+        const size = file.size ? ` (${this.formatFileSize(file.size)})` : '';
+        html += `
+          <div class="file-item ${selectedClass}" data-path="${fullPath}" data-is-directory="false" style="padding-left: ${8 + indent}px">
+            <span class="file-icon">${this.getFileIcon(file.name)}</span>
+            <span class="file-name">${file.name}</span>
+            <span class="file-size">${size}</span>
+          </div>
+        `;
+      }
+    }
+
+    return html;
+  }
+
+  async toggleDirectory(path) {
+    if (this.expandedDirs.has(path)) {
+      this.expandedDirs.delete(path);
+      this.renderFileTree();
+      return;
+    }
+
+    this.expandedDirs.add(path);
+    if (!this.directoryCache.has(path)) {
+      await this.loadDirectory(path);
+      return;
+    }
+    this.renderFileTree();
+  }
+
+  getFileIcon(filename) {
+    const ext = filename.split('.').pop().toLowerCase();
+    const icons = {
+      'txt': '📄',
+      'md': '📝',
+      'py': '🐍',
+      'js': '📜',
+      'html': '🌐',
+      'css': '🎨',
+      'json': '📋',
+      'yaml': '⚙️',
+      'yml': '⚙️',
+      'xml': '📄',
+      'csv': '📊'
+    };
+    return icons[ext] || '📄';
+  }
+
+  formatFileSize(bytes) {
+    if (bytes === 0) return '0 B';
+    const k = 1024;
+    const sizes = ['B', 'KB', 'MB', 'GB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i];
+  }
+
+  async openFile(filePath) {
+    this.hideCompletionDropdown();
+    try {
+      const existingTab = this.findTab(filePath);
+      if (existingTab) {
+        this.switchToTab(filePath);
+        return;
+      }
+
+      const response = await this.apiFetch(`/api/file/${encodeURIComponent(filePath)}`);
+      if (!response.ok) {
+        throw new Error(`Failed to open file: ${response.statusText}`);
+      }
+      const data = await response.json();
+
+      this.openTabs.push({
+        path: filePath,
+        content: data.content,
+        isModified: false
+      });
+      this.activeTabPath = filePath;
+      this.currentFilePath = filePath;
+      this.ignoreNextChange = true;
+      this.editor.dispatch({
+        changes: {
+          from: 0,
+          to: this.editor.state.doc.length,
+          insert: data.content
+        }
+      });
+      this.ignoreNextChange = false;
+      this.markAsSaved();
+      this.setEditorReadOnly(this.isReadOnlyPath(filePath));
+
+      const currentFileEl = document.getElementById('current-file');
+      if (currentFileEl) currentFileEl.textContent = filePath;
+      this.updateRunButtonState();
+      this.renderTabs();
+      this.saveSessionState();
+    } catch (error) {
+      console.error('Error opening file:', error);
+      this.showError('Failed to open file');
+    }
+  }
+
+  async saveFile() {
+    if (!this.currentFilePath) return;
+    if (this.isReadOnlyPath(this.currentFilePath)) {
+      this.showError('Files in lib are read-only');
+      return;
+    }
+
+    try {
+      const content = this.editor.state.doc.toString();
+      const response = await this.apiFetch(`/api/file/${encodeURIComponent(this.currentFilePath)}`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json'
+        },
+        body: JSON.stringify({ content })
+      });
+      
+      if (!response.ok) {
+        throw new Error(`Failed to save file: ${response.statusText}`);
+      }
+
+      const tab = this.findTab(this.currentFilePath);
+      if (tab) {
+        tab.content = content;
+        tab.isModified = false;
+      }
+      this.markAsSaved();
+      this.renderTabs();
+      this.showSuccess('File saved successfully');
+    } catch (error) {
+      console.error('Error saving file:', error);
+      this.showError('Failed to save file');
+    }
+  }
+
+  async deleteFile() {
+    if (!this.currentFilePath) return;
+
+    if (!confirm(`Are you sure you want to delete "${this.currentFilePath}"?`)) {
+      return;
+    }
+
+    try {
+      const deletedPath = this.currentFilePath;
+      const response = await this.apiFetch(`/api/file/${encodeURIComponent(this.currentFilePath)}`, {
+        method: 'DELETE'
+      });
+
+      if (!response.ok) {
+        throw new Error(`Failed to delete file: ${response.statusText}`);
+      }
+
+      this.ignoreNextChange = true;
+      this.editor.dispatch({
+        changes: {
+          from: 0,
+          to: this.editor.state.doc.length,
+          insert: ''
+        }
+      });
+      this.ignoreNextChange = false;
+      this.openTabs = this.openTabs.filter((tab) => tab.path !== deletedPath);
+
+      if (this.openTabs.length > 0) {
+        this.switchToTab(this.openTabs[this.openTabs.length - 1].path);
+      } else {
+        this.currentFilePath = null;
+        this.activeTabPath = null;
+        this.markAsSaved();
+        const currentFileEl = document.getElementById('current-file');
+        if (currentFileEl) currentFileEl.textContent = 'No file selected';
+        this.updateRunButtonState();
+      }
+
+      this.directoryCache.clear();
+      this.loadDirectory("");
+      this.renderTabs();
+      this.showSuccess('File deleted successfully');
+    } catch (error) {
+      console.error('Error deleting file:', error);
+      this.showError('Failed to delete file');
+    }
+  }
+
+  closeTabWithoutPrompt(path) {
+    this.hideCompletionDropdown();
+    this.openTabs = this.openTabs.filter((tab) => tab.path !== path);
+    if (this.activeTabPath === path) {
+      const nextTab = this.openTabs[this.openTabs.length - 1];
+      if (nextTab) {
+        this.switchToTab(nextTab.path);
+      } else {
+        this.activeTabPath = null;
+        this.currentFilePath = null;
+        this.ignoreNextChange = true;
+        this.editor.dispatch({
+          changes: {
+            from: 0,
+            to: this.editor.state.doc.length,
+            insert: ''
+          }
+        });
+        this.ignoreNextChange = false;
+        this.markAsSaved();
+        const currentFileEl = document.getElementById('current-file');
+        if (currentFileEl) currentFileEl.textContent = 'No file selected';
+        this.updateRunButtonState();
+      }
+    }
+    this.renderTabs();
+  }
+
+  updateRunButtonState() {
+    const runButton = document.getElementById('run-btn');
+    const stopButton = document.getElementById('stop-btn');
+    const hasPythonFile = Boolean(this.currentFilePath && this.currentFilePath.toLowerCase().endsWith('.py'));
+    runButton.disabled = !hasPythonFile || this.isPythonRunning;
+    stopButton.disabled = !this.isPythonRunning;
+  }
+
+  clearConsole() {
+    const consoleOutput = document.getElementById('console-output');
+    consoleOutput.textContent = '';
+    this.consolePendingText = '';
+    if (this.consoleFlushTimer) {
+      clearTimeout(this.consoleFlushTimer);
+      this.consoleFlushTimer = null;
+    }
+  }
+
+  appendConsoleOutput(lines) {
+    if (!Array.isArray(lines) || lines.length === 0) return;
+    this.consolePendingText += lines.join('');
+    if (this.consoleFlushTimer) return;
+    this.consoleFlushTimer = setTimeout(() => {
+      const consoleOutput = document.getElementById('console-output');
+      if (this.consolePendingText) {
+        consoleOutput.textContent += this.consolePendingText;
+        this.consolePendingText = '';
+      }
+      const maxChars = 200000;
+      if (consoleOutput.textContent.length > maxChars) {
+        consoleOutput.textContent = consoleOutput.textContent.slice(-maxChars);
+      }
+      consoleOutput.scrollTop = consoleOutput.scrollHeight;
+      this.consoleFlushTimer = null;
+    }, 50);
+  }
+
+  async runPython() {
+    const runFileSelect = document.getElementById('run-file-select');
+    const selectedRunFile = runFileSelect && runFileSelect.value ? runFileSelect.value : this.currentFilePath;
+    if (selectedRunFile && selectedRunFile !== this.currentFilePath && this.findTab(selectedRunFile)) {
+      this.switchToTab(selectedRunFile);
+    }
+    if (!selectedRunFile || !selectedRunFile.toLowerCase().endsWith('.py')) {
+      this.showError('Select a Python (.py) file first');
+      return;
+    }
+
+    try {
+      if (this.isPythonRunning) {
+        await this.stopPython();
+      }
+      if (this.isModified) {
+        await this.saveFile();
+      }
+      const bundleResp = await this.apiFetch('/api/workspace/py-sources');
+      if (!bundleResp.ok) {
+        const errorBody = await bundleResp.json().catch(() => ({}));
+        throw new Error(errorBody.detail || bundleResp.statusText);
+      }
+      const bundle = await bundleResp.json();
+      const files = { ...(bundle.files || {}) };
+      for (const tab of this.openTabs) {
+        if (tab.path && tab.path.toLowerCase().endsWith('.py')) {
+          files[tab.path] = tab.content;
+        }
+      }
+      this.clearConsole();
+      const args = [];
+      this.appendConsoleOutput([`$ pyodide ${selectedRunFile}\n`]);
+      this.isPythonRunning = true;
+      this.updateRunButtonState();
+      const generation = ++this.pyRunGeneration;
+      await this.ensurePyodideReady();
+      await this.callPyWorker('run', {
+        files,
+        mainPath: selectedRunFile,
+        args
+      });
+      if (generation === this.pyRunGeneration) {
+        this.appendConsoleOutput(['\n[Finished]\n']);
+      }
+    } catch (error) {
+      this.appendConsoleOutput([`\n${error.message}\n`]);
+    } finally {
+      this.isPythonRunning = false;
+      this.updateRunButtonState();
+    }
+  }
+
+  async stopPython() {
+    if (!this.isPythonRunning) {
+      return;
+    }
+    this.pyRunGeneration += 1;
+    this.disposePyWorker();
+    this.isPythonRunning = false;
+    this.appendConsoleOutput(['\n[Execution stopped — Pyodide worker was reset]\n']);
+    this.updateRunButtonState();
+  }
+
+  async deleteSelected() {
+    if (!this.selectedPath) {
+      this.showError('Select a file or folder first');
+      return;
+    }
+    const targetType = this.selectedIsDirectory ? "folder" : "file";
+    if (!confirm(`Delete ${targetType} "${this.selectedPath}"?`)) {
+      return;
+    }
+
+    try {
+      const endpoint = this.selectedIsDirectory
+        ? `/api/folder/${encodeURIComponent(this.selectedPath)}`
+        : `/api/file/${encodeURIComponent(this.selectedPath)}`;
+      const response = await this.apiFetch(endpoint, { method: 'DELETE' });
+      if (!response.ok) {
+        throw new Error(`Failed to delete ${targetType}: ${response.statusText}`);
+      }
+
+      if (this.selectedIsDirectory) {
+        const prefix = `${this.selectedPath}/`;
+        const pathsToClose = this.openTabs
+          .map((tab) => tab.path)
+          .filter((path) => path === this.selectedPath || path.startsWith(prefix));
+        pathsToClose.forEach((path) => this.closeTabWithoutPrompt(path));
+      } else {
+        this.closeTabWithoutPrompt(this.selectedPath);
+      }
+
+      this.selectedPath = null;
+      this.selectedIsDirectory = false;
+      this.resetDirectoryState();
+      this.loadDirectory(this.getTreeRootPath());
+      this.showSuccess(`${targetType} deleted successfully`);
+    } catch (error) {
+      console.error(`Error deleting ${targetType}:`, error);
+      this.showError(`Failed to delete ${targetType}`);
+    }
+  }
+
+  getParentDirectory(filePath) {
+    if (!filePath || !filePath.includes('/')) return "";
+    return filePath.slice(0, filePath.lastIndexOf('/'));
+  }
+
+  getNewFileBasePath() {
+    const fallbackRoot = this.getDefaultEditableRoot();
+    if (!this.selectedPath) {
+      return fallbackRoot;
+    }
+    return this.selectedIsDirectory ? this.selectedPath : this.getParentDirectory(this.selectedPath);
+  }
+
+  showNewFileModal() {
+    const basePath = this.getNewFileBasePath();
+    const input = document.getElementById('new-filename');
+    input.value = basePath ? `${basePath}/` : '';
+    document.getElementById('new-file-modal').style.display = 'block';
+    input.focus();
+    input.setSelectionRange(input.value.length, input.value.length);
+  }
+
+  hideNewFileModal() {
+    document.getElementById('new-file-modal').style.display = 'none';
+    document.getElementById('new-filename').value = '';
+  }
+
+  async createNewFile() {
+    const filename = document.getElementById('new-filename').value.trim();
+
+    if (!filename) {
+      this.showError('Please enter a filename');
+      return;
+    }
+
+    try {
+      let cleanName = this.normalizeRelativePathInput(filename);
+      if (cleanName.startsWith('new/')) {
+        cleanName = cleanName.slice(4);
+      }
+      if (!cleanName) {
+        this.showError('Please enter a filename');
+        return;
+      }
+      const targetRoot = this.getDefaultEditableRoot();
+      const targetPath = `${targetRoot}/${cleanName}`;
+      const response = await this.apiFetch(`/api/file/${encodeURIComponent(targetPath)}`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json'
+        },
+        body: JSON.stringify({ filename: targetPath, content: '' })
+      });
+      
+      if (!response.ok) {
+        throw new Error(`Failed to create file: ${response.statusText}`);
+      }
+
+      this.hideNewFileModal();
+      this.resetDirectoryState();
+      this.loadDirectory(this.getTreeRootPath());
+      this.showSuccess('File created successfully');
+    } catch (error) {
+      console.error('Error creating file:', error);
+      this.showError('Failed to create file');
+    }
+  }
+
+  remapPath(path, oldPrefix, newPrefix) {
+    if (!path) return path;
+    if (path === oldPrefix) return newPrefix;
+    if (path.startsWith(`${oldPrefix}/`)) {
+      return `${newPrefix}${path.slice(oldPrefix.length)}`;
+    }
+    return path;
+  }
+
+  async movePathToFolder(sourcePath, sourceIsDirectory, destinationFolder) {
+    if (!sourcePath) {
+      return;
+    }
+    if (sourcePath === destinationFolder) {
+      return;
+    }
+    if (sourceIsDirectory && destinationFolder && destinationFolder.startsWith(`${sourcePath}/`)) {
+      return;
+    }
+    try {
+      const response = await this.apiFetch('/api/file-move', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json'
+        },
+        body: JSON.stringify({
+          source_path: sourcePath,
+          destination_folder: destinationFolder
+        })
+      });
+      if (!response.ok) {
+        const errorBody = await response.json().catch(() => ({}));
+        throw new Error(errorBody.detail || response.statusText);
+      }
+
+      const body = await response.json();
+      const newPath = body.new_path;
+      if (typeof newPath === 'string' && newPath) {
+        this.openTabs.forEach((tab) => {
+          tab.path = this.remapPath(tab.path, sourcePath, newPath);
+        });
+        this.currentFilePath = this.remapPath(this.currentFilePath, sourcePath, newPath);
+        this.activeTabPath = this.remapPath(this.activeTabPath, sourcePath, newPath);
+        if (this.currentFilePath) {
+          const currentFileEl = document.getElementById('current-file');
+          if (currentFileEl) currentFileEl.textContent = this.currentFilePath;
+        }
+        this.selectedPath = this.remapPath(this.selectedPath, sourcePath, newPath);
+        this.expandedDirs = new Set(
+          Array.from(this.expandedDirs).map((path) => this.remapPath(path, sourcePath, newPath))
+        );
+        if (destinationFolder) {
+          this.expandedDirs.add(destinationFolder);
+        }
+      }
+
+      this.directoryCache.clear();
+      this.expandedDirs.add('');
+      this.renderTabs();
+      this.loadDirectory(this.getTreeRootPath());
+      this.showSuccess('Path moved successfully');
+    } catch (error) {
+      this.showError(`Failed to move path: ${error.message}`);
+    }
+  }
+
+  async createNewFolder() {
+    const folderPath = prompt('Enter folder path (e.g., src/components)');
+    if (!folderPath) return;
+    let cleanPath = this.normalizeRelativePathInput(folderPath);
+    if (!cleanPath) {
+      this.showError('Please enter a folder path');
+      return;
+    }
+    const targetRoot = this.getDefaultEditableRoot();
+    const targetPath = `${targetRoot}/${cleanPath}`;
+
+    try {
+      const response = await this.apiFetch(`/api/folder/new/${encodeURIComponent(targetPath)}`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json'
+        },
+        body: JSON.stringify({ path: targetPath })
+      });
+      if (!response.ok) {
+        throw new Error(`Failed to create folder: ${response.statusText}`);
+      }
+      this.resetDirectoryState();
+      this.loadDirectory(this.getTreeRootPath());
+      this.showSuccess('Folder created successfully');
+    } catch (error) {
+      console.error('Error creating folder:', error);
+      this.showError('Failed to create folder');
+    }
+  }
+
+  markAsModified() {
+    this.isModified = true;
+    const saveStatus = document.getElementById('save-status');
+    saveStatus.textContent = 'Unsaved changes';
+    saveStatus.className = 'save-status unsaved';
+  }
+
+  markAsSaved() {
+    this.isModified = false;
+    const saveStatus = document.getElementById('save-status');
+    saveStatus.textContent = 'Saved';
+    saveStatus.className = 'save-status saved';
+  }
+
+  showError(message) {
+    alert(`Error: ${message}`);
+  }
+
+  showSuccess(message) {
+    console.log(`Success: ${message}`);
+  }
+}
+
+async function bootEditorApp() {
+  try {
+    const st = await fetch('/api/auth/status');
+    if (!st.ok) {
+      new TextEditor();
+      return;
+    }
+    const status = await st.json();
+    if (!status.auth_enabled) {
+      new TextEditor();
+      return;
+    }
+    const me = await fetch('/api/auth/me', { credentials: 'include' });
+    if (!me.ok) {
+      const next = encodeURIComponent(`${window.location.pathname}${window.location.search}`);
+      window.location.replace(`/login?next=${next}`);
+      return;
+    }
+    new TextEditor();
+  } catch (_error) {
+    new TextEditor();
+  }
+}
+
+document.addEventListener('DOMContentLoaded', () => {
+  bootEditorApp();
+});
\ No newline at end of file
diff --git a/src/static/styles.css b/src/static/styles.css
new file mode 100644
index 0000000..b1999ed
--- /dev/null
+++ b/src/static/styles.css
@@ -0,0 +1,475 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+  background-color: #f5f5f5;
+  height: 100vh;
+  overflow: hidden;
+}
+
+.container {
+  display: flex;
+  height: 100vh;
+}
+
+/* Sidebar */
+.sidebar {
+  width: 300px;
+  background-color: #2d3748;
+  color: white;
+  display: flex;
+  flex-direction: column;
+}
+
+.sidebar-header {
+  padding: 1rem;
+  border-bottom: 1px solid #4a5568;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+}
+
+.sidebar-header h3 {
+  font-size: 1.1rem;
+  font-weight: 600;
+}
+
+.sidebar-actions {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.sidebar-actions button {
+  background: none;
+  border: none;
+  color: white;
+  cursor: pointer;
+  padding: 0.25rem;
+  border-radius: 4px;
+  font-size: 1rem;
+  transition: background-color 0.2s;
+}
+
+.sidebar-actions button:hover {
+  background-color: #4a5568;
+}
+
+.file-tree {
+  flex: 1;
+  overflow-y: auto;
+  padding: 0.5rem;
+}
+
+.file-item {
+  padding: 0.5rem;
+  cursor: pointer;
+  border-radius: 4px;
+  margin-bottom: 2px;
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  transition: background-color 0.2s;
+}
+
+.file-item:hover {
+  background-color: #4a5568;
+}
+
+.file-item.selected {
+  background-color: #3182ce;
+}
+
+.file-item.drag-target {
+  background-color: #2b6cb0;
+  outline: 1px dashed #90cdf4;
+}
+
+.file-item.dragging-file {
+  opacity: 0.55;
+}
+
+.file-item.directory {
+  font-weight: 600;
+}
+
+.file-item.root-drop {
+  border: 1px dashed #4a5568;
+  margin-bottom: 0.5rem;
+}
+
+.file-icon {
+  font-size: 1rem;
+}
+
+.loading {
+  padding: 1rem;
+  text-align: center;
+  color: #a0aec0;
+}
+
+/* Main Content */
+.main-content {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  background-color: white;
+}
+
+.editor-header {
+  padding: 1rem;
+  border-bottom: 1px solid #e2e8f0;
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  background-color: #f7fafc;
+}
+
+.file-info {
+  display: flex;
+  align-items: center;
+  gap: 1rem;
+}
+
+.runtime-hint {
+  font-size: 0.75rem;
+  color: #718096;
+  border: 1px solid #e2e8f0;
+  border-radius: 6px;
+  padding: 0.2rem 0.45rem;
+  white-space: nowrap;
+}
+
+#current-file {
+  font-weight: 600;
+  color: #2d3748;
+}
+
+.save-status {
+  font-size: 0.875rem;
+  color: #718096;
+}
+
+.save-status.saved {
+  color: #38a169;
+}
+
+.save-status.unsaved {
+  color: #e53e3e;
+}
+
+.mode-toggle {
+  display: inline-flex;
+  border: 1px solid #cbd5e0;
+  border-radius: 8px;
+  overflow: hidden;
+}
+
+.mode-btn {
+  border: none;
+  background: #edf2f7;
+  color: #4a5568;
+  padding: 0.45rem 0.8rem;
+  font-size: 0.85rem;
+  cursor: pointer;
+}
+
+.mode-btn + .mode-btn {
+  border-left: 1px solid #cbd5e0;
+}
+
+.mode-btn.active {
+  background: #3182ce;
+  color: white;
+}
+
+.editor-actions {
+  display: flex;
+  gap: 0.5rem;
+}
+
+#run-file-select {
+  min-width: 220px;
+  padding: 0.5rem 0.65rem;
+  border: 1px solid #cbd5e0;
+  border-radius: 6px;
+  font-size: 0.85rem;
+  background: white;
+}
+
+.editor-actions button {
+  padding: 0.5rem 1rem;
+  border: 1px solid #e2e8f0;
+  background-color: white;
+  color: #4a5568;
+  border-radius: 6px;
+  cursor: pointer;
+  font-size: 0.875rem;
+  transition: all 0.2s;
+}
+
+.editor-actions button:hover:not(:disabled) {
+  background-color: #f7fafc;
+  border-color: #cbd5e0;
+}
+
+.editor-actions button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.editor-actions button:not(:disabled):active {
+  background-color: #edf2f7;
+}
+
+.editor-container {
+  flex: 1;
+  position: relative;
+  min-height: 0;
+}
+
+.hidden {
+  display: none !important;
+}
+
+.completion-dropdown {
+  position: absolute;
+  z-index: 30;
+  display: none;
+  min-width: 220px;
+  max-width: 420px;
+  max-height: 220px;
+  overflow-y: auto;
+  background: #ffffff;
+  border: 1px solid #cbd5e0;
+  border-radius: 6px;
+  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18);
+}
+
+.completion-item {
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  padding: 0.4rem 0.6rem;
+  cursor: pointer;
+  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
+  font-size: 13px;
+}
+
+.completion-item:hover,
+.completion-item.active {
+  background: #ebf8ff;
+}
+
+.completion-name {
+  color: #1a202c;
+}
+
+.completion-type {
+  color: #718096;
+  font-size: 12px;
+}
+
+.tabs {
+  display: flex;
+  gap: 4px;
+  padding: 0.4rem 0.5rem;
+  border-bottom: 1px solid #e2e8f0;
+  background: #f8fafc;
+  overflow-x: auto;
+}
+
+.tab {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.35rem 0.6rem;
+  border: 1px solid #cbd5e0;
+  border-radius: 6px;
+  background: white;
+  color: #2d3748;
+  cursor: pointer;
+  white-space: nowrap;
+}
+
+.tab.active {
+  border-color: #3182ce;
+  background: #ebf8ff;
+}
+
+.tab-title {
+  max-width: 260px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.tab-close {
+  border: none;
+  background: transparent;
+  color: #718096;
+  cursor: pointer;
+  font-size: 14px;
+  line-height: 1;
+}
+
+.tab-close:hover {
+  color: #e53e3e;
+}
+
+#editor {
+  width: 100%;
+  height: 100%;
+  border: none;
+  outline: none;
+  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
+  font-size: 14px;
+  line-height: 1.5;
+  padding: 1rem;
+  resize: none;
+}
+
+/* CodeMirror 6 styling */
+.cm-editor {
+  height: 100%;
+  font-size: 14px;
+  line-height: 1.5;
+}
+
+.cm-focused {
+  outline: none;
+}
+
+.console-container {
+  height: 220px;
+  border-top: 1px solid #e2e8f0;
+  display: flex;
+  flex-direction: column;
+  background: #0f172a;
+}
+
+.console-header {
+  padding: 0.5rem 0.75rem;
+  font-size: 0.85rem;
+  color: #cbd5e1;
+  border-bottom: 1px solid #1e293b;
+}
+
+.console-output {
+  flex: 1;
+  margin: 0;
+  padding: 0.75rem;
+  overflow: auto;
+  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
+  font-size: 13px;
+  line-height: 1.45;
+  color: #e2e8f0;
+  white-space: pre-wrap;
+}
+
+/* Modal */
+.modal {
+  display: none;
+  position: fixed;
+  z-index: 1000;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 100%;
+  background-color: rgba(0, 0, 0, 0.5);
+}
+
+.modal-content {
+  background-color: white;
+  margin: 15% auto;
+  padding: 2rem;
+  border-radius: 8px;
+  width: 400px;
+  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
+}
+
+.modal-content h3 {
+  margin-bottom: 1rem;
+  color: #2d3748;
+}
+
+.modal-content input {
+  width: 100%;
+  padding: 0.75rem;
+  border: 1px solid #e2e8f0;
+  border-radius: 6px;
+  font-size: 1rem;
+  margin-bottom: 1rem;
+}
+
+.modal-content input:focus {
+  outline: none;
+  border-color: #3182ce;
+  box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
+}
+
+.modal-actions {
+  display: flex;
+  gap: 0.5rem;
+  justify-content: flex-end;
+}
+
+.modal-actions button {
+  padding: 0.5rem 1rem;
+  border: 1px solid #e2e8f0;
+  background-color: white;
+  color: #4a5568;
+  border-radius: 6px;
+  cursor: pointer;
+  font-size: 0.875rem;
+  transition: all 0.2s;
+}
+
+.modal-actions button:hover {
+  background-color: #f7fafc;
+  border-color: #cbd5e0;
+}
+
+.modal-actions button:first-child {
+  background-color: #3182ce;
+  color: white;
+  border-color: #3182ce;
+}
+
+.modal-actions button:first-child:hover {
+  background-color: #2c5aa0;
+  border-color: #2c5aa0;
+}
+
+/* Responsive design */
+@media (max-width: 768px) {
+  .sidebar {
+    width: 250px;
+  }
+  
+  .modal-content {
+    width: 90%;
+    margin: 20% auto;
+  }
+}
+
+/* Scrollbar styling */
+.file-tree::-webkit-scrollbar {
+  width: 6px;
+}
+
+.file-tree::-webkit-scrollbar-track {
+  background: #2d3748;
+}
+
+.file-tree::-webkit-scrollbar-thumb {
+  background: #4a5568;
+  border-radius: 3px;
+}
+
+.file-tree::-webkit-scrollbar-thumb:hover {
+  background: #718096;
+}
+
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..5d97b51
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,24 @@
+import importlib
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+@pytest.fixture
+def client(tmp_path, monkeypatch):
+    monkeypatch.setenv("WORKSPACE_ROOT", str(tmp_path))
+    monkeypatch.setenv("AUTH_ENABLED", "false")
+    monkeypatch.setenv("AUTH_DATABASE_PATH", str(tmp_path / "auth.db"))
+    monkeypatch.delenv("EDITOR_API_KEY", raising=False)
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_USERNAME", raising=False)
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_PASSWORD", raising=False)
+
+    import editor_app.config as config
+    import editor_app.db.session as db_sess
+    import editor_app.main as main
+
+    config.WORKSPACE_ROOT = tmp_path
+    db_sess.reset_engine()
+    importlib.reload(main)
+    with TestClient(main.app) as test_client:
+        yield test_client
diff --git a/tests/test_api.py b/tests/test_api.py
new file mode 100644
index 0000000..b3f9a0a
--- /dev/null
+++ b/tests/test_api.py
@@ -0,0 +1,286 @@
+import importlib
+from pathlib import Path
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+def test_root_serves_html(client):
+    response = client.get("/")
+    assert response.status_code == 200
+    assert "text/html" in response.headers["content-type"]
+    assert "Python Editor" in response.text
+
+
+def test_editor_route_serves_editor_html(client):
+    response = client.get("/editor")
+    assert response.status_code == 200
+    assert "text/html" in response.headers["content-type"]
+    assert "Python Editor" in response.text
+
+
+def test_list_files_hides_dotfiles_and_reports_sizes(client, tmp_path):
+    (tmp_path / ".hidden.txt").write_text("secret", encoding="utf-8")
+    (tmp_path / "visible.txt").write_text("hello", encoding="utf-8")
+    (tmp_path / "folder").mkdir()
+
+    response = client.get("/api/files")
+    assert response.status_code == 200
+
+    files = response.json()["files"]
+    names = {item["name"] for item in files}
+    assert ".hidden.txt" not in names
+    assert "visible.txt" in names
+    assert "folder" in names
+
+
+def test_list_files_missing_directory_returns_404(client):
+    response = client.get("/api/files", params={"path": "does-not-exist"})
+    assert response.status_code == 404
+
+
+def test_save_and_read_file_roundtrip(client, tmp_path):
+    response = client.post("/api/file/code/docs/readme.txt", json={"content": "doc body"})
+    assert response.status_code == 200
+    assert (tmp_path / "code" / "docs" / "readme.txt").read_text(encoding="utf-8") == "doc body"
+
+    read_response = client.get("/api/file/code/docs/readme.txt")
+    assert read_response.status_code == 200
+    assert read_response.json()["content"] == "doc body"
+
+
+def test_save_file_collapses_duplicate_scoped_prefix(client, tmp_path):
+    response = client.post("/api/file/code/code/main.py", json={"content": "print('ok')"})
+    assert response.status_code == 200
+    assert (tmp_path / "code" / "main.py").read_text(encoding="utf-8") == "print('ok')"
+    assert not (tmp_path / "code" / "code" / "main.py").exists()
+
+
+def test_lib_folder_is_read_only_for_mutations(client, tmp_path):
+    lib_dir = tmp_path / "lib"
+    lib_dir.mkdir(exist_ok=True)
+    (lib_dir / "helper.py").write_text("x = 1\n", encoding="utf-8")
+    code_dir = tmp_path / "code"
+    code_dir.mkdir()
+    (code_dir / "main.py").write_text("print('ok')\n", encoding="utf-8")
+
+    save_blocked = client.post("/api/file/lib/new.txt", json={"content": "nope"})
+    assert save_blocked.status_code == 403
+
+    delete_blocked = client.delete("/api/file/lib/helper.py")
+    assert delete_blocked.status_code == 403
+
+    move_blocked = client.post(
+        "/api/file-move",
+        json={"source_path": "code/main.py", "destination_folder": "lib"},
+    )
+    assert move_blocked.status_code == 403
+
+
+def test_only_code_is_writable(client, tmp_path):
+    blocked_file = client.post("/api/file/notes.txt", json={"content": "nope"})
+    assert blocked_file.status_code == 403
+
+    blocked_folder = client.post("/api/folder/new/archive", json={"path": "ignored"})
+    assert blocked_folder.status_code == 403
+
+    blocked_prompt = client.post("/api/file/prompts/a.txt", json={"content": "nope"})
+    assert blocked_prompt.status_code == 403
+
+    allowed_code = client.post("/api/file/code/a.txt", json={"content": "ok"})
+    assert allowed_code.status_code == 200
+
+
+def test_read_file_errors_for_directory_and_missing(client, tmp_path):
+    (tmp_path / "docs").mkdir()
+
+    dir_response = client.get("/api/file/docs")
+    assert dir_response.status_code == 400
+
+    missing_response = client.get("/api/file/missing.txt")
+    assert missing_response.status_code == 404
+
+
+def test_read_file_non_utf8_returns_400(client, tmp_path):
+    (tmp_path / "bin.dat").write_bytes(b"\xff\xfe\x00")
+    response = client.get("/api/file/bin.dat")
+    assert response.status_code == 400
+
+
+def test_delete_file_success_and_errors(client, tmp_path):
+    target = tmp_path / "code" / "delete-me.txt"
+    target.parent.mkdir()
+    target.write_text("x", encoding="utf-8")
+
+    ok = client.delete("/api/file/code/delete-me.txt")
+    assert ok.status_code == 200
+    assert not target.exists()
+
+    missing = client.delete("/api/file/code/delete-me.txt")
+    assert missing.status_code == 404
+
+    (tmp_path / "code" / "dir").mkdir(parents=True)
+    directory = client.delete("/api/file/code/dir")
+    assert directory.status_code == 400
+
+
+def test_move_file_to_another_folder(client, tmp_path):
+    source = tmp_path / "code" / "docs" / "note.txt"
+    source.parent.mkdir(parents=True)
+    source.write_text("hello", encoding="utf-8")
+    (tmp_path / "code" / "archive").mkdir(parents=True)
+
+    response = client.post(
+        "/api/file-move",
+        json={"source_path": "code/docs/note.txt", "destination_folder": "code/archive"},
+    )
+    assert response.status_code == 200
+    assert response.json()["new_path"] == "code/archive/note.txt"
+    assert not source.exists()
+    assert (tmp_path / "code" / "archive" / "note.txt").exists()
+
+
+def test_move_file_errors(client, tmp_path):
+    (tmp_path / "code" / "docs").mkdir(parents=True)
+    (tmp_path / "code" / "docs" / "note.txt").write_text("x", encoding="utf-8")
+    (tmp_path / "code" / "archive").mkdir(parents=True)
+    (tmp_path / "code" / "archive" / "note.txt").write_text("x", encoding="utf-8")
+
+    conflict = client.post(
+        "/api/file-move",
+        json={"source_path": "code/docs/note.txt", "destination_folder": "code/archive"},
+    )
+    assert conflict.status_code == 409
+
+    missing = client.post(
+        "/api/file-move",
+        json={"source_path": "code/missing.txt", "destination_folder": "code/archive"},
+    )
+    assert missing.status_code == 404
+
+
+def test_move_folder_to_another_folder(client, tmp_path):
+    (tmp_path / "code" / "docs").mkdir(parents=True)
+    (tmp_path / "code" / "docs" / "note.txt").write_text("x", encoding="utf-8")
+    (tmp_path / "code" / "archive").mkdir(parents=True)
+
+    response = client.post(
+        "/api/file-move",
+        json={"source_path": "code/docs", "destination_folder": "code/archive"},
+    )
+    assert response.status_code == 200
+    assert response.json()["new_path"] == "code/archive/docs"
+    assert response.json()["moved_type"] == "folder"
+    assert (tmp_path / "code" / "archive" / "docs" / "note.txt").exists()
+    assert not (tmp_path / "code" / "docs").exists()
+
+
+def test_move_folder_errors(client, tmp_path):
+    (tmp_path / "code" / "docs").mkdir(parents=True)
+    (tmp_path / "code" / "docs" / "nested").mkdir()
+    (tmp_path / "code" / "archive").mkdir(parents=True)
+    (tmp_path / "code" / "archive" / "docs").mkdir()
+
+    into_child = client.post(
+        "/api/file-move",
+        json={"source_path": "code/docs", "destination_folder": "code/docs/nested"},
+    )
+    assert into_child.status_code == 400
+
+    name_conflict = client.post(
+        "/api/file-move",
+        json={"source_path": "code/docs", "destination_folder": "code/archive"},
+    )
+    assert name_conflict.status_code == 409
+
+
+def test_path_escape_is_blocked(client):
+    response = client.post("/api/file/%2E%2E/evil.txt", json={"content": "nope"})
+    assert response.status_code == 400
+
+
+def test_folder_create_and_delete(client, tmp_path):
+    create = client.post("/api/folder/new/code/new-folder", json={"path": "ignored"})
+    assert create.status_code == 200
+    assert (tmp_path / "code" / "new-folder").is_dir()
+
+    exists = client.post("/api/folder/new/code/new-folder", json={"path": "ignored"})
+    assert exists.status_code == 400
+
+    delete = client.delete("/api/folder/code/new-folder")
+    assert delete.status_code == 200
+    assert not (tmp_path / "code" / "new-folder").exists()
+
+
+def test_create_folder_collapses_duplicate_scoped_prefix(client, tmp_path):
+    (tmp_path / "code").mkdir()
+    create = client.post("/api/folder/new/code/code/nested", json={"path": "ignored"})
+    assert create.status_code == 200
+    assert (tmp_path / "code" / "nested").is_dir()
+    assert not (tmp_path / "code" / "code").exists()
+
+
+def test_folder_delete_errors(client, tmp_path):
+    missing = client.delete("/api/folder/code/missing")
+    assert missing.status_code == 404
+
+    (tmp_path / "code").mkdir()
+    (tmp_path / "code" / "file.txt").write_text("x", encoding="utf-8")
+    not_dir = client.delete("/api/folder/code/file.txt")
+    assert not_dir.status_code == 400
+
+
+def test_workspace_py_sources_returns_python_files(client, tmp_path):
+    (tmp_path / "code").mkdir()
+    (tmp_path / "code" / "app.py").write_text("x = 1\n", encoding="utf-8")
+    (tmp_path / "lib").mkdir(exist_ok=True)
+    (tmp_path / "lib" / "util.py").write_text("def f():\n    pass\n", encoding="utf-8")
+
+    response = client.get("/api/workspace/py-sources")
+    assert response.status_code == 200
+    files = response.json()["files"]
+    assert files["code/app.py"] == "x = 1\n"
+    assert "lib/util.py" in files
+
+
+def test_api_requires_bearer_when_editor_api_key_set(tmp_path, monkeypatch):
+    import editor_app.config as config
+    import editor_app.db.session as db_sess
+    import editor_app.main as main
+
+    monkeypatch.setenv("WORKSPACE_ROOT", str(tmp_path))
+    monkeypatch.setenv("AUTH_ENABLED", "false")
+    monkeypatch.setenv("AUTH_DATABASE_PATH", str(tmp_path / "auth.db"))
+    monkeypatch.setenv("EDITOR_API_KEY", "secret-token")
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_USERNAME", raising=False)
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_PASSWORD", raising=False)
+    config.WORKSPACE_ROOT = tmp_path
+    db_sess.reset_engine()
+    importlib.reload(main)
+    with TestClient(main.app) as app_client:
+        blocked = app_client.get("/api/files")
+        assert blocked.status_code == 401
+
+        ok = app_client.get("/api/files", headers={"Authorization": "Bearer secret-token"})
+        assert ok.status_code == 200
+
+
+def test_create_app_startup_creates_lib(tmp_path, monkeypatch):
+    import editor_app.config as config
+    import editor_app.db.session as db_sess
+    import editor_app.main as main
+
+    monkeypatch.setenv("WORKSPACE_ROOT", str(tmp_path))
+    monkeypatch.setenv("AUTH_ENABLED", "false")
+    monkeypatch.setenv("AUTH_DATABASE_PATH", str(tmp_path / "auth.db"))
+    monkeypatch.delenv("EDITOR_API_KEY", raising=False)
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_USERNAME", raising=False)
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_PASSWORD", raising=False)
+    config.WORKSPACE_ROOT = tmp_path
+    db_sess.reset_engine()
+    importlib.reload(main)
+
+    assert not (tmp_path / "lib").exists()
+    with TestClient(main.app) as _client:
+        _client.get("/api/auth/status")
+    assert (tmp_path / "lib").is_dir()
diff --git a/tests/test_auth.py b/tests/test_auth.py
new file mode 100644
index 0000000..286e8a8
--- /dev/null
+++ b/tests/test_auth.py
@@ -0,0 +1,133 @@
+import importlib
+
+import pytest
+from fastapi.testclient import TestClient
+
+
+def _reload_app(tmp_path, monkeypatch, **env):
+    import editor_app.config as config
+    import editor_app.db.session as db_sess
+    import editor_app.main as main
+
+    monkeypatch.setenv("WORKSPACE_ROOT", str(tmp_path))
+    monkeypatch.setenv("AUTH_DATABASE_PATH", str(tmp_path / "auth.db"))
+    monkeypatch.delenv("EDITOR_API_KEY", raising=False)
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_USERNAME", raising=False)
+    monkeypatch.delenv("BOOTSTRAP_ADMIN_PASSWORD", raising=False)
+    for k, v in env.items():
+        monkeypatch.setenv(k, v)
+    config.WORKSPACE_ROOT = tmp_path
+    db_sess.reset_engine()
+    importlib.reload(main)
+    return main.app
+
+
+def test_auth_status_public(tmp_path, monkeypatch):
+    with TestClient(_reload_app(tmp_path, monkeypatch, AUTH_ENABLED="false")) as client:
+        r = client.get("/api/auth/status")
+        assert r.status_code == 200
+        assert r.json() == {"auth_enabled": False, "register_open": True}
+
+
+def test_register_login_and_api_access(tmp_path, monkeypatch):
+    with TestClient(
+        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
+    ) as client:
+        assert client.get("/api/files").status_code == 401
+
+        reg = client.post("/api/auth/register", json={"username": "alice", "password": "hunter2000"})
+        assert reg.status_code == 200
+        body = reg.json()
+        assert body["username"] == "alice"
+        assert body["is_superuser"] is True
+
+        login = client.post("/api/auth/login", json={"username": "alice", "password": "hunter2000"})
+        assert login.status_code == 200
+
+        ok = client.get("/api/files")
+        assert ok.status_code == 200
+
+        me = client.get("/api/auth/me")
+        assert me.status_code == 200
+        assert me.json()["user"]["username"] == "alice"
+
+        out = client.post("/api/auth/logout")
+        assert out.status_code == 200
+        assert client.get("/api/files").status_code == 401
+
+
+def test_second_user_not_superuser(tmp_path, monkeypatch):
+    with TestClient(
+        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
+    ) as client:
+        r1 = client.post("/api/auth/register", json={"username": "usr1", "password": "password99"})
+        assert r1.status_code == 200
+        assert r1.json()["is_superuser"] is True
+        r2 = client.post("/api/auth/register", json={"username": "usr2", "password": "password99"})
+        assert r2.status_code == 200
+        assert r2.json()["is_superuser"] is False
+
+
+def test_register_duplicate_username(tmp_path, monkeypatch):
+    with TestClient(
+        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
+    ) as client:
+        assert client.post("/api/auth/register", json={"username": "dupuser", "password": "password99"}).status_code == 200
+        dup = client.post("/api/auth/register", json={"username": "dupuser", "password": "otherpass1"})
+        assert dup.status_code == 409
+
+
+def test_register_closed(tmp_path, monkeypatch):
+    with TestClient(
+        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="false")
+    ) as client:
+        r = client.post("/api/auth/register", json={"username": "bob", "password": "password99"})
+        assert r.status_code == 403
+
+
+def test_superuser_lists_and_creates_users(tmp_path, monkeypatch):
+    with TestClient(
+        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
+    ) as client:
+        client.post("/api/auth/register", json={"username": "admin", "password": "password99"})
+        client.post("/api/auth/login", json={"username": "admin", "password": "password99"})
+
+        listed = client.get("/api/users")
+        assert listed.status_code == 200
+        assert len(listed.json()) == 1
+
+        created = client.post(
+            "/api/users",
+            json={"username": "sub", "password": "password99", "is_superuser": False},
+        )
+        assert created.status_code == 200
+        assert created.json()["username"] == "sub"
+        assert created.json()["is_superuser"] is False
+
+        names = {u["username"] for u in client.get("/api/users").json()}
+        assert names == {"admin", "sub"}
+
+
+def test_non_superuser_cannot_list_users(tmp_path, monkeypatch):
+    with TestClient(
+        _reload_app(tmp_path, monkeypatch, AUTH_ENABLED="true", AUTH_REGISTER_OPEN="true")
+    ) as client:
+        client.post("/api/auth/register", json={"username": "boss", "password": "password99"})
+        client.post("/api/auth/login", json={"username": "boss", "password": "password99"})
+        client.post("/api/auth/logout")
+        client.post("/api/auth/register", json={"username": "peon", "password": "password99"})
+        client.post("/api/auth/login", json={"username": "peon", "password": "password99"})
+        denied = client.get("/api/users")
+        assert denied.status_code == 403
+
+
+def test_login_serves_page(client):
+    r = client.get("/login")
+    assert r.status_code == 200
+    assert "Sign in" in r.text
+
+
+def test_register_serves_page(client):
+    r = client.get("/register")
+    assert r.status_code == 200
+    assert "Create account" in r.text
diff --git a/tests/test_browser.py b/tests/test_browser.py
new file mode 100644
index 0000000..2045338
--- /dev/null
+++ b/tests/test_browser.py
@@ -0,0 +1,101 @@
+import importlib
+import socket
+import subprocess
+import sys
+import time
+from pathlib import Path
+
+import pytest
+
+
+def _is_port_open(port: int) -> bool:
+    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
+        sock.settimeout(0.3)
+        return sock.connect_ex(("127.0.0.1", port)) == 0
+
+
+@pytest.mark.integration
+def test_browser_create_file_not_forced_into_new(tmp_path):
+    playwright = pytest.importorskip("playwright.sync_api")
+    sync_playwright = playwright.sync_playwright
+
+    editor_dir = Path(__file__).resolve().parents[1]
+    port = 8123
+    env = dict(
+        **__import__("os").environ,
+        WORKSPACE_ROOT=str(tmp_path),
+        AUTH_ENABLED="false",
+        AUTH_DATABASE_PATH=str(tmp_path / "playwright_auth.db"),
+    )
+
+    server = subprocess.Popen(
+        [
+            sys.executable,
+            "-m",
+            "uvicorn",
+            "app:app",
+            "--app-dir",
+            "src",
+            "--host",
+            "127.0.0.1",
+            "--port",
+            str(port),
+        ],
+        cwd=str(editor_dir),
+        env=env,
+        stdout=subprocess.DEVNULL,
+        stderr=subprocess.DEVNULL,
+    )
+    try:
+        for _ in range(50):
+            if _is_port_open(port):
+                break
+            time.sleep(0.1)
+        else:
+            pytest.fail("Server did not start in time")
+
+        with sync_playwright() as p:
+            try:
+                browser = p.chromium.launch()
+            except Exception as exc:  # pragma: no cover
+                pytest.skip(f"Playwright browser not installed: {exc}")
+
+            page = browser.new_page()
+            page.goto(f"http://127.0.0.1:{port}/editor", wait_until="networkidle")
+            page.click("#new-file-btn")
+            page.fill("#new-filename", "browser-test.txt")
+            page.click("#create-file-btn")
+            page.wait_for_timeout(500)
+            browser.close()
+
+        assert (tmp_path / "code" / "browser-test.txt").exists()
+        assert not (tmp_path / "new" / "browser-test.txt").exists()
+    finally:
+        server.terminate()
+        try:
+            server.wait(timeout=3)
+        except subprocess.TimeoutExpired:
+            server.kill()
+
+
+def test_new_file_uses_api_file_route(tmp_path, monkeypatch):
+    import editor_app.config as config
+    import editor_app.db.session as db_sess
+    import editor_app.main as main
+    from fastapi.testclient import TestClient
+
+    monkeypatch.setenv("WORKSPACE_ROOT", str(tmp_path))
+    monkeypatch.setenv("AUTH_ENABLED", "false")
+    monkeypatch.setenv("AUTH_DATABASE_PATH", str(tmp_path / "auth_route.db"))
+    config.WORKSPACE_ROOT = tmp_path
+    db_sess.reset_engine()
+    importlib.reload(main)
+    client = TestClient(main.app)
+
+    response = client.post(
+        "/api/file/code/routing-check.txt",
+        json={"content": "ok"},
+    )
+    assert response.status_code == 200
+    assert (tmp_path / "code" / "routing-check.txt").exists()
+    assert not (tmp_path / "new" / "routing-check.txt").exists()
diff --git a/tests/test_internal.py b/tests/test_internal.py
new file mode 100644
index 0000000..71eabe1
--- /dev/null
+++ b/tests/test_internal.py
@@ -0,0 +1,45 @@
+import importlib
+from pathlib import Path
+
+import pytest
+
+
+def test_load_env_file_sets_missing_keys_only(tmp_path, monkeypatch):
+    import editor_app.config as config
+
+    env_file = tmp_path / ".env"
+    env_file.write_text(
+        "# comment\nFOO=bar\nBAZ='quoted'\nEXISTING=from_file\n", encoding="utf-8"
+    )
+
+    monkeypatch.setenv("EXISTING", "kept")
+    monkeypatch.delenv("FOO", raising=False)
+    monkeypatch.delenv("BAZ", raising=False)
+
+    config.load_env_file(env_file)
+
+    assert __import__("os").environ["FOO"] == "bar"
+    assert __import__("os").environ["BAZ"] == "quoted"
+    assert __import__("os").environ["EXISTING"] == "kept"
+
+
+def test_load_env_file_ignores_missing_file(tmp_path):
+    import editor_app.config as config
+
+    config.load_env_file(tmp_path / "missing.env")
+
+
+def test_collect_python_sources_skips_hidden_and_binary(tmp_path):
+    import editor_app.config as config
+    import editor_app.services.filesystem as filesystem
+
+    (tmp_path / "code").mkdir()
+    (tmp_path / "code" / "ok.py").write_text("a = 1\n", encoding="utf-8")
+    (tmp_path / "code" / ".venv").mkdir()
+    (tmp_path / "code" / ".venv" / "skip.py").write_text("x\n", encoding="utf-8")
+    (tmp_path / "bad.py").write_bytes(b"\xff\xff")
+
+    config.WORKSPACE_ROOT = tmp_path
+    out = filesystem.collect_python_sources()
+    assert out["code/ok.py"] == "a = 1\n"
+    assert "bad.py" not in out
diff --git a/tests/test_selenium_smoke.py b/tests/test_selenium_smoke.py
new file mode 100644
index 0000000..58b7db6
--- /dev/null
+++ b/tests/test_selenium_smoke.py
@@ -0,0 +1,48 @@
+"""Selenium smoke tests — need a running app (see README)."""
+
+from __future__ import annotations
+
+import os
+import urllib.error
+import urllib.request
+
+import pytest
+
+pytest.importorskip("selenium.webdriver")
+
+
+def _server_reachable(base_url: str, timeout: float = 2.0) -> bool:
+    try:
+        urllib.request.urlopen(f"{base_url.rstrip('/')}/", timeout=timeout)
+        return True
+    except (urllib.error.URLError, OSError):
+        return False
+
+
+@pytest.fixture
+def driver():
+    from selenium import webdriver
+    from selenium.webdriver.chrome.options import Options
+
+    opts = Options()
+    opts.add_argument("--headless=new")
+    opts.add_argument("--no-sandbox")
+    opts.add_argument("--disable-dev-shm-usage")
+    try:
+        browser = webdriver.Chrome(options=opts)
+    except Exception as exc:  # pragma: no cover
+        pytest.skip(f"Chrome / ChromeDriver not available: {exc}")
+    yield browser
+    browser.quit()
+
+
+@pytest.mark.selenium
+def test_home_page_title(driver):
+    base = os.environ.get("SELENIUM_BASE_URL", "http://127.0.0.1:8080").rstrip("/")
+    if not _server_reachable(base):
+        pytest.skip(
+            f"No server at {base}. In another terminal run: "
+            "pipenv run dev   (then re-run this test, or set SELENIUM_BASE_URL)."
+        )
+    driver.get(f"{base}/")
+    assert "Python Editor" in driver.title
diff --git a/workspace/code/main.py b/workspace/code/main.py
new file mode 100644
index 0000000..f686611
--- /dev/null
+++ b/workspace/code/main.py
@@ -0,0 +1,3 @@
+"""Sample script — runs in the browser under Pyodide."""
+
+print("Hello from Pyodide")
diff --git a/workspace/lib/helpers.py b/workspace/lib/helpers.py
new file mode 100644
index 0000000..1fd557f
--- /dev/null
+++ b/workspace/lib/helpers.py
@@ -0,0 +1,5 @@
+"""Shared helpers (read-only on server; copied into Pyodide when you run)."""
+
+
+def greet(name: str) -> str:
+    return f"Hello, {name}!"