feat(01-01): create device registry, show store, FastAPI app, API routes, and frontend shell

- DeviceRegistry with load/save/add/remove/instantiate and _DEVICE_CLASSES dict
- ShowStore with save/load/list_ids using aiofiles for async I/O
- FastAPI app with lifespan hook (startup: load registry/store, shutdown: save registry)
- API routes: GET/POST /api/devices/, DELETE /api/devices/{id}, GET/POST /api/shows/, GET /api/shows/{id}
- WebSocket stub at /ws with ConnectionManager and ack echo
- Frontend shell: DAW layout with header, sidebar (DEVICES + ANIMATIONS), TIMELINE, TRANSPORT
- Terminal aesthetic: dark theme, cyan accents, monospace fonts, no drop shadows
- .gitignore for runtime data (devices.json, shows/, __pycache__, .venv)

lightsync/main.py

@@ -0,0 +1,43 @@
+from contextlib import asynccontextmanager
+from pathlib import Path
+from fastapi import FastAPI
+from fastapi.staticfiles import StaticFiles
+
+from lightsync.devices.registry import DeviceRegistry
+from lightsync.store.show_store import ShowStore
+
+# Module-level containers populated in lifespan
+registry: DeviceRegistry | None = None
+show_store: ShowStore | None = None
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    global registry, show_store
+    # Startup
+    registry = DeviceRegistry(Path("devices.json"))
+    await registry.load()
+    show_store = ShowStore(Path("shows"))
+    show_store.ensure_dir()
+    yield
+    # Shutdown
+    await registry.save()
+
+
+def create_app() -> FastAPI:
+    app = FastAPI(title="LightSync", lifespan=lifespan)
+
+    # API routes (registered before static mount — see Pattern 7)
+    from lightsync.api import shows, devices, ws
+    app.include_router(shows.router, prefix="/api/shows")
+    app.include_router(devices.router, prefix="/api/devices")
+    app.include_router(ws.router)
+
+    # Static file serving — MUST be last (catches all unmatched paths)
+    frontend_dir = Path(__file__).parent / "frontend"
+    app.mount("/", StaticFiles(directory=frontend_dir, html=True), name="frontend")
+
+    return app
+
+
+app = create_app()