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/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