feat(clients): scaffold mobile (Capacitor) + desktop (Electron) shells

Plan + decisions in CLIENTS.md (parallel mobile+desktop; desktop = technician
client + existing remote-control agent host; mobile = Capacitor wrap).

- desktop/: Electron technician client — loads the live Connect UI, native
  screen capture via setDisplayMediaRequestHandler, persisted session, external
  links to browser; electron-builder config for Win/Mac/Linux installers.
- mobile/: Capacitor project — server.url loads Connect UI, push/camera/status-bar
  plugins declared, www splash fallback; iOS/Android added via `cap add`.
- Reuses the existing /api/v1 + Bearer auth backend; no web-code changes.
- .gitignore: ignore generated mobile/android, mobile/ios platform dirs.

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

mobile/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "biz-connect-mobile",
+  "version": "0.1.0",
+  "description": "Biz Connect mobile app — Capacitor shell loading the Connect web UI",
+  "scripts": {
+    "sync": "cap sync",
+    "android": "cap open android",
+    "ios": "cap open ios"
+  },
+  "dependencies": {
+    "@capacitor/android": "^6.1.0",
+    "@capacitor/app": "^6.0.0",
+    "@capacitor/camera": "^6.0.0",
+    "@capacitor/core": "^6.1.0",
+    "@capacitor/ios": "^6.1.0",
+    "@capacitor/push-notifications": "^6.0.0",
+    "@capacitor/status-bar": "^6.0.0"
+  },
+  "devDependencies": {
+    "@capacitor/cli": "^6.1.0"
+  }
+}