feat(auth): integrate Firebase authentication and update auth flow

- Added Firebase authentication methods for login, signup, and password reset.
- Replaced mock user database with Firebase user management.
- Updated auth store to handle Firebase user state and authentication.
- Implemented middleware for Firebase authentication in RPC routes.
- Enhanced error handling and user feedback with toast notifications.
- Added Toast component for user notifications in the UI.
- Updated API client to include authorization headers for authenticated requests.
- Removed unused CSRF token logic and related code.

package.json

@@ -17,15 +17,17 @@
     "@primeuix/themes": "^2.0.2",
     "@primevue/forms": "^4.5.4",
     "@unhead/vue": "^2.1.1",
-    "is-mobile": "^5.0.0",
     "@vueuse/core": "^14.1.0",
     "clsx": "^2.1.1",
+    "firebase": "^12.8.0",
+    "firebase-admin": "^13.6.0",
     "hono": "^4.11.3",
+    "is-mobile": "^5.0.0",
     "pinia": "^3.0.4",
     "primevue": "^4.5.4",
+    "tailwind-merge": "^3.4.0",
     "vue": "^3.5.26",
     "vue-router": "^4.6.4",
-    "tailwind-merge": "^3.4.0",
     "zod": "^4.3.2"
   },
   "devDependencies": {
@@ -41,4 +43,4 @@
     "vite-ssr-components": "^0.5.2",
     "wrangler": "^4.54.0"
   }
-}
+}