feat: Samsung lock screen face widget, voice assistant services, PiP mode and gitignore installers

Add Samsung proprietary Face Widget (lock screen/AOD) with terminal status display.
Add voice interaction services (AgentVoiceInteractionService, RecognitionService) for
digital assistant registration. Add PiP mode with voice/expand actions. Add session-state
proxy, voice transcript routes, window controls component. Ignore installers/ directory.

src-tauri/tauri.conf.json

@@ -6,7 +6,7 @@
   "build": {
     "frontendDist": "../frontend/dist",
     "devUrl": "http://localhost:4100",
-    "beforeDevCommand": "cd frontend && npm run dev",
+    "beforeDevCommand": "",
     "beforeBuildCommand": "cd frontend && npx vite build"
   },
   "app": {
@@ -17,7 +17,7 @@
         "height": 800,
         "minWidth": 800,
         "minHeight": 600,
-        "decorations": true,
+        "decorations": false,
         "resizable": true
       }
     ],