Move desktop and e2e into examples/ directory

- desktop/ → examples/django-react-desktop-app/
- e2e/ → examples/django-react-site/
- example/ → examples/django-react-site/backend/
- Update Dockerfile.test, Makefile, playwright config, and
  django.config.mjs path references

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

examples/django-react-desktop-app/app.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+"""
+mizan Desktop — PyWebView + Django local RPC.
+
+Starts a local Django ASGI server and opens a native desktop window.
+All communication between the UI and backend uses mizan server functions.
+"""
+
+import os
+import sys
+import threading
+import time
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "backend.settings")
+
+# Work around Qt WebEngine GPU crashes on some systems
+os.environ.setdefault("QTWEBENGINE_CHROMIUM_FLAGS", "--disable-gpu")
+
+
+def start_server(host: str, port: int):
+    """Start the Django ASGI server in a background thread."""
+    import django
+
+    django.setup()
+
+    # Run migrations on first launch
+    from django.core.management import call_command
+
+    call_command("migrate", "--run-syncdb", verbosity=0)
+
+    import uvicorn
+
+    uvicorn.run(
+        "backend.asgi:application",
+        host=host,
+        port=port,
+        log_level="warning",
+    )
+
+
+def wait_for_server(url: str, timeout: float = 10.0):
+    """Poll until the server responds."""
+    from urllib.request import urlopen
+    from urllib.error import URLError
+
+    deadline = time.time() + timeout
+    while time.time() < deadline:
+        try:
+            urlopen(url, timeout=1)
+            return True
+        except (URLError, OSError):
+            time.sleep(0.1)
+    return False
+
+
+def main():
+    host = "127.0.0.1"
+    port = 8765
+
+    # Start Django in a daemon thread
+    server = threading.Thread(target=start_server, args=(host, port), daemon=True)
+    server.start()
+
+    base_url = f"http://{host}:{port}"
+
+    if not wait_for_server(f"{base_url}/api/mizan/session/"):
+        print("ERROR: Django server failed to start", file=sys.stderr)
+        sys.exit(1)
+
+    print(f"Backend running at {base_url}")
+
+    # Check if --headless flag is passed (for testing)
+    if "--headless" in sys.argv:
+        print("Headless mode — server running. Press Ctrl+C to stop.")
+        try:
+            while True:
+                time.sleep(1)
+        except KeyboardInterrupt:
+            pass
+        return
+
+    # Open native window
+    import webview
+
+    window = webview.create_window(
+        title="mizan Desktop",
+        url=base_url,
+        width=1024,
+        height=768,
+        min_size=(640, 480),
+    )
+    webview.start()
+
+
+if __name__ == "__main__":
+    main()