Person detection via direct MQTT instead of HA entities

- Electron main process subscribes to Frigate's MQTT topics
  (frigate/<camera>/person and frigate/events) directly via mqtt.js,
  bypassing the broken HA MQTT integration
- Watched cameras: Front_Porch, FPE, Porch_Downstairs, Driveway_door
- On person detection, exits photo-frame idle and shows full-screen
  camera feed for 30 seconds
- Removed HA entity-based person detection code (entityToCameraName,
  personDetectionEntities config dependency)
- Deleted unused useFrigateDetection HTTP polling hook (superseded)

electron/main.ts

@@ -6,12 +6,14 @@ import { ScreenManager } from './services/ScreenManager';
 import { PresenceDetector } from './services/PresenceDetector';
 import { FrigateStreamer } from './services/FrigateStreamer';
 import { PhotoManager } from './services/PhotoManager';
+import { FrigateDetector } from './services/FrigateDetector';
 
 let mainWindow: BrowserWindow | null = null;
 let screenManager: ScreenManager | null = null;
 let presenceDetector: PresenceDetector | null = null;
 let frigateStreamer: FrigateStreamer | null = null;
 let photoManager: PhotoManager | null = null;
+let frigateDetector: FrigateDetector | null = null;
 let powerSaveBlockerId: number | null = null;
 
 // Photos directory: env var PHOTOS_PATH wins, else fall back to ~/Pictures/dashboard
@@ -66,6 +68,20 @@ function createWindow(): void {
   photoManager = new PhotoManager(resolvePhotosDir());
   console.log(`PhotoManager: watching ${photoManager.getDir()}`);
 
+  // Frigate person detection via MQTT (bypasses HA entities)
+  frigateDetector = new FrigateDetector({
+    mqttUrl: 'mqtt://192.168.1.50:1883',
+    mqttUser: 'mqtt',
+    mqttPassword: '11xpfcryan',
+    topicPrefix: 'frigate',
+    cameras: ['Front_Porch', 'FPE', 'Porch_Downstairs', 'Driveway_door'],
+  });
+  frigateDetector.on('personDetected', (camera: string) => {
+    console.log(`FrigateDetector: person on ${camera}`);
+    mainWindow?.webContents.send('frigate:personDetected', camera);
+  });
+  frigateDetector.start();
+
   // Handle window close
   mainWindow.on('closed', () => {
     mainWindow = null;
@@ -225,6 +241,7 @@ app.on('window-all-closed', () => {
   }
   presenceDetector?.stop();
   frigateStreamer?.stop();
+  frigateDetector?.stop();
 
   if (process.platform !== 'darwin') {
     app.quit();