fix: Bridge _send_to_rvs ping-check before send, force reconnect on zombie

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

bridge/aria_bridge.py

@@ -1354,10 +1354,24 @@ class ARIABridge:
                         pass
 
     async def _send_to_rvs(self, message: dict) -> None:
-        """Sendet eine Nachricht an die App (via RVS)."""
+        """Sendet eine Nachricht an die App (via RVS) mit Verbindungs-Check."""
         if self.ws_rvs is None:
             return
 
+        # Ping-Check: Verbindung wirklich aktiv?
+        try:
+            pong = await self.ws_rvs.ping()
+            await asyncio.wait_for(pong, timeout=5)
+        except Exception:
+            logger.warning("[rvs] Ping fehlgeschlagen — Verbindung tot, erzwinge Reconnect")
+            try:
+                await self.ws_rvs.close()
+            except Exception:
+                pass
+            self.ws_rvs = None
+            # Reconnect wird vom connect_to_rvs Loop uebernommen
+            return
+
         try:
             await self.ws_rvs.send(json.dumps(message))
         except Exception: