feat(desktop): Phase D — inline-reply notifications (Windows toast reply box)

Reply to a chat straight from the OS notification, no app switch:
- node-notifier (bundles SnoreToast) renders a native Windows toast with a reply box —
  Electron's own Notification can't do Windows inline reply.
- main.js reply-notification handler resolves {text}|{open}|null; preload exposes replyNotify.
- home.html notify() routes chat toasts through it on desktop: a typed reply -> sendReplyTo()
  POSTs to /api/messages without opening the app; a click opens the chat. Web/PWA path unchanged.
- Works only in the installed app (needs the installer's AppUserModelID). desktop 0.1.2, build batch21.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

desktop/package.json

@@ -1,6 +1,6 @@
 {
   "name": "biz-connect-desktop",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "Biz Connect technician desktop client — loads the Connect web UI with native screen capture",
   "author": { "name": "BizGaze", "email": "support@bizgaze.com" },
   "main": "main.js",
@@ -9,7 +9,8 @@
     "dist": "electron-builder"
   },
   "dependencies": {
-    "electron-updater": "^6.3.9"
+    "electron-updater": "^6.3.9",
+    "node-notifier": "^10.0.1"
   },
   "devDependencies": {
     "electron": "^31.0.0",