Add browser Python editor with Pyodide, user auth, and workspace API

- FastAPI serves static UI, file CRUD under code/ and read-only lib/
- Pyodide worker runs Python and Jedi completions in the browser
- SQLite accounts: login/register, session cookies, superuser user management
- Optional EDITOR_API_KEY, AUTH_* env vars, .env.example
- Pipenv, pytest, Selenium smoke test, README

Made-with: Cursor

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