feat: 切换邮箱认证并重构前后端启动与门禁

apps/lib/app/di/injection.dart

@@ -0,0 +1,17 @@
+import '../../core/config/env.dart';
+
+class AppDependencies {
+  const AppDependencies({required this.backendUrl});
+
+  final String backendUrl;
+}
+
+AppDependencies? _appDependencies;
+
+AppDependencies get appDependencies {
+  return _appDependencies ?? AppDependencies(backendUrl: Env.backendUrl);
+}
+
+Future<void> configureDependencies() async {
+  _appDependencies = AppDependencies(backendUrl: Env.backendUrl);
+}