Fix loading state bugs and server crash

Backend fixes:
- Fix server crash when logging large session_state messages (186 agents)
- Use safe logging that extracts only message/stack properties
- Prevents TypeError in util.inspect on circular refs or deep objects

Frontend loading state fixes:
- Add reactive WebSocket update to prevent stale session.ws references
- Add timeout/retry wrapper for session_state loading (3 retries × 15s)
- Add hasEverReceivedSessionState flag to track cached data across reconnects
- Implement data-aware loading (isInitialLoad vs isRevalidating)
- Show reconnecting badge instead of hiding agents on reconnect

Debug improvements:
- Add detailed connection state logging in useAggregatedAgents
- Add connection status logging in AgentInputArea
- Track connecting reasons for easier debugging

Fixes:
- Agent screen no longer shows false "Offline" toast on reconnect
- Home screen shows loading immediately (no empty state flash)
- Home screen keeps agents visible during reconnect with badge
- Stuck loading has timeout protection with graceful degradation
- Server no longer crashes when sending session_state with many agents

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/app/src/components/agent-input-area.tsx

@@ -272,6 +272,13 @@ export function AgentInputArea({ agentId, serverId }: AgentInputAreaProps) {
   }, [discardFailedDictation]);
 
   const dictationToast = useMemo<DictationToastConfig | null>(() => {
+    console.log('[AgentInputArea] Connection status:', {
+      isConnected: connectionStatus.isConnected,
+      wsIsConnected: ws.isConnected,
+      wsIsConnecting: ws.isConnecting,
+      hasSession: !!session,
+    });
+
     if (!connectionStatus.isConnected) {
       return {
         variant: "warning",