Fix HA websocket keepalive fallback

app/main.py

@@ -100,7 +100,7 @@ async def lifespan(app: FastAPI) -> AsyncIterator[None]:
 app = FastAPI(
     title="SillyHome Next API",
     description="Lokales Smart-Home-Intelligenzsystem für Home Assistant.",
-    version="0.7.7",
+    version="0.7.8",
     lifespan=lifespan,
 )
 app.state.settings = load_settings()
@@ -171,7 +171,7 @@ async def _ha_event_listener(app: FastAPI, client: HaClient) -> None:
         if ws_status is not None:
             ws_status.status = "connecting"
         try:
-            async with websockets.connect(ws_url) as websocket:
+            async with websockets.connect(ws_url, ping_interval=None) as websocket:
                 auth_required_msg = await websocket.recv()
                 auth_required_data = json.loads(auth_required_msg)
                 if auth_required_data.get("type") != "auth_required":
@@ -252,7 +252,13 @@ async def _fallback_prediction(app: FastAPI) -> None:
     Dies verhindert kompletten Ausfall der Vorhersagen bei Netzwerkproblemen.
     """
     while True:
-        await asyncio.sleep(app.state.settings.prediction_interval_seconds)
+        ws_status = getattr(app.state, "ws_status", None)
+        websocket_connected = ws_status is not None and ws_status.status == "connected"
+        await asyncio.sleep(
+            app.state.settings.prediction_interval_seconds
+            if websocket_connected
+            else min(5, app.state.settings.prediction_interval_seconds)
+        )
         # Nur ausführen, wenn WebSocket nicht verbunden ist
         ws_status = getattr(app.state, "ws_status", None)
         if ws_status is None or ws_status.status != "connected":