feat: complete Phase 1-3 architecture optimization

Phase 1 - Security:
- Add AES-GCM encryption for localStorage fallback
- Enforce WSS protocol for non-localhost WebSocket connections
- Add URL sanitization to prevent XSS in markdown links

Phase 2 - Domain Reorganization:
- Create Intelligence Domain with Valtio store and caching
- Add unified intelligence-client for Rust backend integration
- Migrate from legacy agent-memory, heartbeat, reflection modules

Phase 3 - Core Optimization:
- Add virtual scrolling for ChatArea with react-window
- Implement LRU cache with TTL for intelligence operations
- Add message virtualization utilities

Additional:
- Add OpenFang compatibility test suite
- Update E2E test fixtures
- Add audit logging infrastructure
- Update project documentation and plans

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src-tauri/src/intelligence/heartbeat.rs

@@ -159,7 +159,7 @@ impl HeartbeatEngine {
                 }
 
                 // Check quiet hours
-                if is_quiet_hours(&config.lock().await) {
+                if is_quiet_hours(&*config.lock().await) {
                     continue;
                 }
 
@@ -270,6 +270,8 @@ async fn execute_tick(
         ("idle-greeting", check_idle_greeting),
     ];
 
+    let checks_count = checks.len();
+
     for (source, check_fn) in checks {
         if alerts.len() >= cfg.max_alerts_per_tick {
             break;
@@ -297,7 +299,7 @@ async fn execute_tick(
     HeartbeatResult {
         status,
         alerts: filtered_alerts,
-        checked_items: checks.len(),
+        checked_items: checks_count,
         timestamp: chrono::Utc::now().to_rfc3339(),
     }
 }