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/api/shows.py

@@ -0,0 +1,34 @@
+from fastapi import APIRouter, HTTPException
+from lightsync.models.show import ShowModel
+import lightsync.main as state  # access show_store via module-level ref
+
+router = APIRouter(tags=["shows"])
+
+
+@router.get("/")
+async def list_shows():
+    """Return summary list of all shows."""
+    summaries = []
+    for show_id in state.show_store.list_ids():
+        show = await state.show_store.load(show_id)
+        if show is not None:
+            summaries.append({
+                "id": str(show.id),
+                "name": show.name,
+                "created_at": show.created_at.isoformat(),
+            })
+    return summaries
+
+
+@router.post("/", status_code=201)
+async def create_show(show: ShowModel) -> ShowModel:
+    await state.show_store.save(show)
+    return show
+
+
+@router.get("/{show_id}")
+async def get_show(show_id: str) -> ShowModel:
+    show = await state.show_store.load(show_id)
+    if show is None:
+        raise HTTPException(404, "Show not found")
+    return show