Increase watchdog timeout to 30 minutes

Changed from 10 to 30 minutes to avoid false positives when
heartbeatMinutes is set to 10. The watchdog should be significantly
longer than the heartbeat interval to account for:
- Network latency
- Slow command responses
- Brief connection hiccups

With heartbeatMinutes=10, a 30-minute watchdog gives 3x buffer before
triggering auto-restart.

src/web/auto-reply.ts

@@ -518,7 +518,8 @@ export async function monitorWebProvider(
     let lastInboundMsg: WebInboundMsg | null = null;
 
     // Watchdog to detect stuck message processing (e.g., event emitter died)
-    const MESSAGE_TIMEOUT_MS = 10 * 60 * 1000; // 10 minutes without any messages
+    // Should be significantly longer than heartbeatMinutes to avoid false positives
+    const MESSAGE_TIMEOUT_MS = 30 * 60 * 1000; // 30 minutes without any messages
     const WATCHDOG_CHECK_MS = 60 * 1000; // Check every minute
 
     const listener = await (listenerFactory ?? monitorWebInbox)({