perf(home): 冷启动提前拉取首页数据

lib/core/config/app_config.dart

@@ -28,6 +28,12 @@ class AppConfig {
 
   static String _runtimeBaseUrl = '';
 
+  static Future<void>? _ready;
+
+  /// 启动地址探测完成信号；默认已完成，避免影响既有测试与调用方。
+  static Future<void> get ready => _ready ?? Future<void>.value();
+  static set ready(Future<void> value) => _ready = value;
+
   static const Duration _probeTimeout = Duration(seconds: 2);
   static const List<String> _probeCandidates = [
     lanBaseUrl,
@@ -85,10 +91,15 @@ class AppConfig {
       for (final candidate in _probeCandidates)
         if (candidate != _runtimeBaseUrl) candidate,
     ];
-    for (final candidate in candidates) {
-      final result = probe == null
-          ? await _probeBaseUrl(candidate)
-          : await _runInjectedProbe(candidate, probe);
+    final results = await Future.wait([
+      for (final candidate in candidates)
+        probe == null
+            ? _probeBaseUrl(candidate)
+            : _runInjectedProbe(candidate, probe),
+    ]);
+    for (var index = 0; index < candidates.length; index++) {
+      final candidate = candidates[index];
+      final result = results[index];
       if (kDebugMode) {
         final status = result.ok
             ? 'ok'

lib/core/data/remote/api_client.dart

@@ -21,7 +21,7 @@ class ApiClient {
     this.tokenRefresher,
     this.onUnauthorized,
     this.deviceIdReader,
-  }) : baseUrl = baseUrl ?? AppConfig.apiBaseUrl {
+  }) : _fixedBaseUrl = baseUrl {
     _dio = Dio(
       BaseOptions(
         baseUrl: this.baseUrl,
@@ -45,9 +45,12 @@ class ApiClient {
     }
   }
 
-  final String baseUrl;
+  final String? _fixedBaseUrl;
   late final Dio _dio;
 
+  /// 当前请求使用的服务地址；未显式指定时跟随启动探测结果。
+  String get baseUrl => _fixedBaseUrl ?? AppConfig.apiBaseUrl;
+
   /// 取当前 access token（未登录返回 null）
   final String? Function()? accessTokenReader;
 
@@ -110,6 +113,7 @@ class ApiClient {
     bool retried = false,
     bool skipAuthRetry = false,
   }) async {
+    _syncBaseUrl();
     final disableAuthRetry = skipAuthRetry || tokenRefresher == null;
     try {
       final response = await _dio.request<Object?>(
@@ -150,5 +154,10 @@ class ApiClient {
     }
   }
 
+  void _syncBaseUrl() {
+    if (_fixedBaseUrl != null) return;
+    _dio.options.baseUrl = AppConfig.apiBaseUrl;
+  }
+
   void close() => _dio.close(force: true);
 }

lib/core/data/services/catalog_controller.dart

@@ -35,6 +35,7 @@ class CatalogController extends ChangeNotifier {
     debugError = null;
     notifyListeners();
     try {
+      await AppConfig.ready;
       feed = await repository.fetchHomeFeed();
     } on ApiException catch (exception) {
       error = exception.message;

lib/main.dart

@@ -13,6 +13,6 @@ Future<void> main() async {
     SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]),
     ServerEndpoint.load(),
   ]);
-  await AppConfig.probeAndApplyBaseUrl();
+  AppConfig.ready = AppConfig.probeAndApplyBaseUrl();
   runApp(const LumaDramaApp());
 }