feat(ios): 首次启动询问无线数据权限

iOS 在首个接口请求前等待系统无线数据选择，避免未授权时请求被静默拒绝。

lib/core/platform/wireless_data_prompt.dart

@@ -0,0 +1,62 @@
+// Author: fruit.com.cn
+
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
+
+/// iOS 首次启动等待系统无线数据选择，再发首个接口请求。
+abstract final class WirelessDataPrompt {
+  const WirelessDataPrompt._();
+
+  /// 系统选择超过此时长仍未回调时继续启动。
+  static const Duration decisionTimeout = Duration(seconds: 15);
+
+  /// 与 iOS `WirelessDataPrompt.channelName` 保持一致。
+  static const String channelName = 'com.stormg.lumadrama/wireless-data';
+
+  static const String _awaitDecisionMethod = 'awaitDecision';
+
+  static const MethodChannel _channel = MethodChannel(channelName);
+
+  static Future<void>? _pending;
+
+  /// 非 iOS 立即返回。iOS 只等待一次，失败或超时后放行。
+  static Future<void> awaitDecision({
+    required bool enabled,
+    Future<void> Function()? ask,
+    Duration? timeout,
+  }) {
+    if (!enabled) return Future<void>.value();
+    return _pending ??= _askOnce(ask, timeout ?? decisionTimeout);
+  }
+
+  /// 测试隔离用，清掉已完成的等待。
+  @visibleForTesting
+  static void resetForTest() {
+    _pending = null;
+  }
+
+  static Future<void> _askOnce(
+    Future<void> Function()? ask,
+    Duration timeout,
+  ) async {
+    try {
+      await (ask ?? _invokeChannel).call().timeout(timeout);
+    } on TimeoutException {
+      _log('decision timed out');
+    } catch (error) {
+      _log('decision skipped: $error');
+    }
+  }
+
+  static Future<void> _invokeChannel() {
+    return _channel.invokeMethod<void>(_awaitDecisionMethod);
+  }
+
+  static void _log(String message) {
+    if (kDebugMode) {
+      debugPrint('[wireless-data] $message');
+    }
+  }
+}

lib/main.dart

@@ -2,17 +2,21 @@
 
 import 'dart:async';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
 import 'app.dart';
 import 'core/config/app_config.dart';
 import 'core/config/server_endpoint.dart';
+import 'core/platform/wireless_data_prompt.dart';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await ServerEndpoint.load();
-  AppConfig.ready = AppConfig.probeAndApplyBaseUrl();
+  AppConfig.ready = WirelessDataPrompt.awaitDecision(
+    enabled: !kIsWeb && defaultTargetPlatform == TargetPlatform.iOS,
+  ).then((_) => AppConfig.probeAndApplyBaseUrl());
   runApp(const LumaDramaApp());
   unawaited(
     SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]),