feat: add authentication system (login, users, auth middleware)

- server/auth.js: JWT middleware and auth routes
- src/stores/auth.js + useAuthFetch.js: client-side auth state
- src/views/LoginView.vue + UsersView.vue: login and user management UI
- router, sidebar, App.vue: guard routes behind auth
- COOLIFY.md: add real deployment IDs

package.json

@@ -10,9 +10,11 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "bcryptjs": "^3.0.3",
     "better-sqlite3": "^11.8.1",
     "concurrently": "^9.1.2",
     "express": "^4.21.2",
+    "jsonwebtoken": "^9.0.3",
     "lucide-vue-next": "^0.469.0",
     "pinia": "^2.2.6",
     "vue": "^3.5.13",