fix：第一轮跑

lib/features/ads/application/ad_config_foreground_refresher.dart

@@ -0,0 +1,32 @@
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import '../../mall/application/mall_tab_config.dart';
+import '../data/ads_api_client.dart';
+import 'splash_ad_controller.dart';
+
+final adConfigForegroundRefresherProvider = Provider(
+  (ref) => AdConfigForegroundRefresher(
+    () => ref.invalidate(featuredAdsProvider(homeBannerAdPlacement)),
+    () => ref.read(splashAdControllerProvider).refresh(),
+    () => ref.read(mallTabConfigProvider.notifier).refresh(),
+  ),
+);
+
+class AdConfigForegroundRefresher {
+  AdConfigForegroundRefresher(this._banner, this._splash, this._mall);
+  final void Function() _banner;
+  final Future<void> Function() _splash, _mall;
+  Future<void>? _running;
+  Future<void> refresh() =>
+      _running ??= _refresh().whenComplete(() => _running = null);
+  Future<void> _refresh() async {
+    try {
+      _banner();
+    } catch (_) {}
+    try {
+      await _splash();
+    } catch (_) {}
+    try {
+      await _mall();
+    } catch (_) {}
+  }
+}

lib/features/ads/application/splash_ad_controller.dart

@@ -0,0 +1,128 @@
+import 'dart:convert';
+import 'dart:io' show File;
+
+import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+import '../../../common/storage/storage_service.dart';
+import '../data/ads_api_client.dart';
+
+class SplashAdEntry {
+  const SplashAdEntry(this.ad, this.dailyCap, this.assetPath, this.cachedAtMs);
+  final AdCreative ad;
+  final int dailyCap;
+  final String? assetPath;
+  final int cachedAtMs;
+  bool get valid =>
+      ad.isRenderable &&
+      DateTime.now().millisecondsSinceEpoch <
+          cachedAtMs + const Duration(hours: 24).inMilliseconds &&
+      (ad.endAtMs <= 0 || ad.endAtMs > DateTime.now().millisecondsSinceEpoch);
+  Map<String, dynamic> toJson() => {
+    'ad': ad.toJson(),
+    'dailyCap': dailyCap,
+    'assetPath': assetPath,
+    'cachedAtMs': cachedAtMs,
+  };
+  factory SplashAdEntry.fromJson(Map<String, dynamic> map) => SplashAdEntry(
+    AdCreative.fromJson(Map<String, dynamic>.from(map['ad'] as Map)),
+    (map['dailyCap'] as num?)?.toInt() ?? 0,
+    map['assetPath'] as String?,
+    (map['cachedAtMs'] as num?)?.toInt() ?? 0,
+  );
+}
+
+class SplashAdController {
+  SplashAdController(this._api);
+  final AdsApiClient _api;
+  static const _entryKey = 'ads.splash.entry';
+  static const _dailyKey = 'ads.splash.daily';
+  Future<SplashAdEntry?> coldLaunchDecision() async {
+    final raw = StorageService.to.preferences.getString(_entryKey);
+    if (raw == null) return null;
+    try {
+      final entry = SplashAdEntry.fromJson(
+        Map<String, dynamic>.from(jsonDecode(raw) as Map),
+      );
+      if (!entry.valid || !_underCap(entry) || !await _ready(entry)) {
+        return null;
+      }
+      return entry;
+    } catch (_) {
+      await clearCache();
+      return null;
+    }
+  }
+
+  bool _underCap(SplashAdEntry entry) {
+    final value = StorageService.to.preferences.getString(_dailyKey);
+    final today = DateTime.now().toIso8601String().substring(0, 10);
+    if (value == null) return true;
+    final map = Map<String, dynamic>.from(jsonDecode(value) as Map);
+    return map['date'] != today ||
+        entry.dailyCap <= 0 ||
+        ((map['count'] as num?)?.toInt() ?? 0) < entry.dailyCap;
+  }
+
+  Future<bool> _ready(SplashAdEntry entry) async =>
+      entry.assetPath != null && await File(entry.assetPath!).exists();
+  Future<void> markShown(SplashAdEntry entry) async {
+    final today = DateTime.now().toIso8601String().substring(0, 10);
+    final raw = StorageService.to.preferences.getString(_dailyKey);
+    var count = 0;
+    if (raw != null) {
+      final m = Map<String, dynamic>.from(jsonDecode(raw) as Map);
+      if (m['date'] == today) count = (m['count'] as num?)?.toInt() ?? 0;
+    }
+    await StorageService.to.preferences.setString(
+      _dailyKey,
+      jsonEncode({'date': today, 'count': count + 1}),
+    );
+    await _report(entry.ad, 'ad_impression');
+  }
+
+  Future<void> refresh() async {
+    try {
+      final result = await _api.getAdResult(splashAdPlacement);
+      if (!result.enabled || result.ad == null) {
+        await _clearEntry();
+        return;
+      }
+      final file = await DefaultCacheManager().getSingleFile(
+        result.ad!.imageUrl,
+      );
+      if (!await file.exists()) return;
+      await StorageService.to.preferences.setString(
+        _entryKey,
+        jsonEncode(
+          SplashAdEntry(
+            result.ad!,
+            result.dailyCap,
+            file.path,
+            DateTime.now().millisecondsSinceEpoch,
+          ).toJson(),
+        ),
+      );
+    } catch (_) {}
+  }
+
+  Future<void> _report(AdCreative ad, String event, {String? clickId}) async {
+    try {
+      await _api.report(ad, event, clickId: clickId);
+    } catch (_) {}
+  }
+
+  Future<void> skip(SplashAdEntry entry) => _report(entry.ad, 'ad_skip');
+  Future<void> clearCache() async {
+    await _clearEntry();
+    await StorageService.to.preferences.remove(_dailyKey);
+  }
+
+  Future<void> _clearEntry() async {
+    await StorageService.to.preferences.remove(_entryKey);
+  }
+}
+
+final splashAdControllerProvider = Provider(
+  (ref) => SplashAdController(ref.watch(adsApiClientProvider)),
+);

lib/features/ads/application/startup_ad_service.dart

@@ -0,0 +1,57 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:url_launcher/url_launcher.dart';
+import '../../../common/router/app_router.dart';
+import '../data/ads_api_client.dart';
+import '../presentation/splash_ad_dialog.dart';
+import 'splash_ad_controller.dart';
+
+final startupAdResolvedProvider = StateProvider<bool>((_) => false);
+
+abstract final class StartupAdService {
+  static Future<void>? _running;
+  static Future<void> showIfAvailable(BuildContext context, WidgetRef ref) =>
+      _running ??= _show(context, ref);
+  static Future<void> _show(BuildContext context, WidgetRef ref) async {
+    final controller = ref.read(splashAdControllerProvider);
+    try {
+      final entry = await controller.coldLaunchDecision();
+      if (entry != null && context.mounted) {
+        final result = await showGeneralDialog<SplashAdResult>(
+          context: context,
+          useRootNavigator: true,
+          barrierDismissible: false,
+          barrierColor: Colors.black,
+          pageBuilder: (ctx, _, _) => SplashAdDialog(
+            entry: entry,
+            onShown: () => unawaited(controller.markShown(entry)),
+            onClick: () async {
+              final id = ref.read(adsApiClientProvider).newClickId();
+              final uri = entry.ad.clickUri(id);
+              if (uri != null) {
+                unawaited(
+                  ref
+                      .read(adsApiClientProvider)
+                      .report(entry.ad, 'ad_click', clickId: id),
+                );
+                if (entry.ad.openMode == AdOpenMode.inApp) {
+                  context.push(
+                    '${AppRoutes.web}?url=${Uri.encodeComponent(uri.toString())}',
+                  );
+                } else {
+                  await launchUrl(uri, mode: LaunchMode.externalApplication);
+                }
+              }
+            },
+          ),
+        );
+        if (result == SplashAdResult.skipped) unawaited(controller.skip(entry));
+      }
+    } finally {
+      ref.read(startupAdResolvedProvider.notifier).state = true;
+      unawaited(controller.refresh());
+    }
+  }
+}

lib/features/ads/data/ads_api_client.dart

@@ -0,0 +1,294 @@
+import 'dart:typed_data';
+
+import 'package:dio/dio.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:uuid/uuid.dart';
+
+import '../../../common/network/dio_provider.dart';
+
+const splashAdPlacement = 'splash';
+const homeBannerAdPlacement = 'home_banner';
+
+enum AdMediaType { image, gif, video, unsupported }
+
+enum AdOpenMode { external, inApp }
+
+class AdCreative {
+  const AdCreative({
+    required this.adId,
+    required this.placement,
+    required this.targetApp,
+    required this.title,
+    required this.imageUrl,
+    required this.mediaType,
+    required this.h5Url,
+    required this.trackingId,
+    required this.countdownSeconds,
+    required this.endAtMs,
+    required this.trackedUrl,
+    required this.openMode,
+  });
+  final String adId,
+      placement,
+      targetApp,
+      title,
+      imageUrl,
+      h5Url,
+      trackingId,
+      trackedUrl;
+  final AdMediaType mediaType;
+  final int countdownSeconds, endAtMs;
+  final AdOpenMode openMode;
+  Uri? get mediaUri => _http(imageUrl);
+  Uri? get targetUri => _http(trackedUrl) ?? _http(h5Url);
+  bool get isRenderable =>
+      adId.isNotEmpty &&
+      mediaUri != null &&
+      targetUri != null &&
+      mediaType != AdMediaType.unsupported &&
+      (endAtMs <= 0 || endAtMs > DateTime.now().millisecondsSinceEpoch);
+  Uri? clickUri(String clickId) {
+    final uri = targetUri;
+    if (uri == null) return null;
+    return uri.replace(
+      queryParameters: {
+        ...uri.queryParameters,
+        'ad_id': adId,
+        'placement': placement,
+        'tracking_id': trackingId,
+        'click_id': clickId,
+        'target_app': targetApp,
+        'hook_type': placement,
+        'ts': DateTime.now().millisecondsSinceEpoch.toString(),
+      },
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+    'adId': adId,
+    'placement': placement,
+    'targetApp': targetApp,
+    'title': title,
+    'imageUrl': imageUrl,
+    'mediaType': mediaType.index,
+    'h5Url': h5Url,
+    'trackingId': trackingId,
+    'countdownSeconds': countdownSeconds,
+    'endAtMs': endAtMs,
+    'trackedUrl': trackedUrl,
+    'openMode': openMode.index,
+  };
+  factory AdCreative.fromJson(Map<String, dynamic> value) => AdCreative(
+    adId: '${value['adId'] ?? ''}',
+    placement: '${value['placement'] ?? ''}',
+    targetApp: '${value['targetApp'] ?? ''}',
+    title: '${value['title'] ?? ''}',
+    imageUrl: '${value['imageUrl'] ?? ''}',
+    mediaType:
+        AdMediaType.values[(value['mediaType'] as num?)?.toInt().clamp(
+              0,
+              AdMediaType.values.length - 1,
+            ) ??
+            AdMediaType.unsupported.index],
+    h5Url: '${value['h5Url'] ?? ''}',
+    trackingId: '${value['trackingId'] ?? ''}',
+    countdownSeconds: (value['countdownSeconds'] as num?)?.toInt() ?? 0,
+    endAtMs: (value['endAtMs'] as num?)?.toInt() ?? 0,
+    trackedUrl: '${value['trackedUrl'] ?? ''}',
+    openMode: (value['openMode'] as num?)?.toInt() == AdOpenMode.inApp.index
+        ? AdOpenMode.inApp
+        : AdOpenMode.external,
+  );
+  factory AdCreative.fromProto(ProtoMessage fields) => AdCreative(
+    adId: fields.string(1),
+    placement: fields.string(2),
+    targetApp: fields.string(3),
+    title: fields.string(4),
+    imageUrl: fields.string(6),
+    mediaType: switch (fields.integer(7)) {
+      1 => AdMediaType.image,
+      2 => AdMediaType.gif,
+      3 => AdMediaType.video,
+      _ => AdMediaType.unsupported,
+    },
+    h5Url: fields.string(9),
+    trackingId: fields.string(10),
+    countdownSeconds: fields.integer(11),
+    endAtMs: fields.integer(13),
+    trackedUrl: fields.string(14),
+    openMode: fields.integer(15) == 2 ? AdOpenMode.inApp : AdOpenMode.external,
+  );
+}
+
+class GetAdResult {
+  const GetAdResult(this.enabled, this.ad, this.dailyCap);
+  final bool enabled;
+  final AdCreative? ad;
+  final int dailyCap;
+}
+
+class FeaturedAdsState {
+  const FeaturedAdsState(this.enabled, this.ads, {this.trackingId});
+  final bool enabled;
+  final List<AdCreative> ads;
+  final String? trackingId;
+  bool get hasAds => enabled && ads.isNotEmpty;
+}
+
+class AdsApiClient {
+  AdsApiClient(this._dio);
+  final Dio _dio;
+  Future<GetAdResult> getAdResult(String placement) async {
+    final response = await _dio.get<List<int>>(
+      '/api/v1/ads',
+      queryParameters: {'placement': placement},
+      options: protobufOptions(),
+    );
+    final root = ProtoMessage(response.data ?? const []);
+    final creative = root.message(2);
+    final ad = AdCreative.fromProto(creative);
+    return GetAdResult(
+      root.integer(1) != 0,
+      ad.isRenderable ? ad : null,
+      root.integer(3),
+    );
+  }
+
+  Future<FeaturedAdsState> listAds(String placement) async {
+    final response = await _dio.get<List<int>>(
+      '/api/v1/ads/list',
+      queryParameters: {'placement': placement},
+      options: protobufOptions(),
+    );
+    final root = ProtoMessage(response.data ?? const []);
+    final ads = root
+        .messages(2)
+        .map(AdCreative.fromProto)
+        .where((ad) => ad.isRenderable)
+        .toList(growable: false);
+    return FeaturedAdsState(
+      root.integer(1) != 0,
+      ads,
+      trackingId: root.string(3).isEmpty ? null : root.string(3),
+    );
+  }
+
+  Future<void> report(
+    AdCreative ad,
+    String event, {
+    String? clickId,
+    String? trackingId,
+  }) => _dio.post<List<int>>(
+    '/api/v1/ads/events',
+    data: _Writer()
+        .string(1, event)
+        .string(2, ad.placement)
+        .string(3, ad.adId)
+        .string(4, trackingId ?? ad.trackingId)
+        .string(5, clickId ?? '')
+        .integer(6, DateTime.now().millisecondsSinceEpoch)
+        .toBytes(),
+    options: protobufOptions(),
+  );
+  String newClickId() => const Uuid().v4();
+}
+
+final adsApiClientProvider = Provider(
+  (ref) => AdsApiClient(ref.watch(dioProvider)),
+);
+final featuredAdsProvider = FutureProvider.autoDispose
+    .family<FeaturedAdsState, String>(
+      (ref, placement) => ref.watch(adsApiClientProvider).listAds(placement),
+    );
+
+Uri? _http(String raw) {
+  final uri = Uri.tryParse(raw.trim());
+  return uri != null &&
+          uri.host.isNotEmpty &&
+          (uri.scheme == 'https' || uri.scheme == 'http')
+      ? uri
+      : null;
+}
+
+class ProtoMessage {
+  ProtoMessage(this.bytes);
+  final List<int> bytes;
+  Map<int, List<Object>>? _cache;
+  Map<int, List<Object>> get _fields => _cache ??= _read();
+  int integer(int tag) => (_fields[tag]?.lastOrNull as int?) ?? 0;
+  String string(int tag) {
+    final value = _fields[tag]?.lastOrNull;
+    return value is List<int> ? String.fromCharCodes(value) : '';
+  }
+
+  ProtoMessage message(int tag) {
+    final value = _fields[tag]?.lastOrNull;
+    return ProtoMessage(value is List<int> ? value : const []);
+  }
+
+  List<ProtoMessage> messages(int tag) => (_fields[tag] ?? const [])
+      .whereType<List<int>>()
+      .map(ProtoMessage.new)
+      .toList();
+  Map<int, List<Object>> _read() {
+    final out = <int, List<Object>>{};
+    var i = 0;
+    int v() {
+      var n = 0, s = 0;
+      while (i < bytes.length) {
+        final b = bytes[i++];
+        n |= (b & 127) << s;
+        if (b < 128) return n;
+        s += 7;
+      }
+      throw const FormatException('Invalid protobuf');
+    }
+
+    while (i < bytes.length) {
+      final key = v(), tag = key >> 3;
+      Object value;
+      if ((key & 7) == 0) {
+        value = v();
+      } else if ((key & 7) == 2) {
+        final l = v(), end = i + l;
+        if (end > bytes.length) throw const FormatException('Invalid protobuf');
+        value = bytes.sublist(i, end);
+        i = end;
+      } else {
+        throw const FormatException('Unsupported protobuf');
+      }
+      (out[tag] ??= []).add(value);
+    }
+    return out;
+  }
+}
+
+extension on List<Object> {
+  Object? get lastOrNull => isEmpty ? null : last;
+}
+
+class _Writer {
+  final b = BytesBuilder(copy: false);
+  _Writer string(int t, String value) {
+    final d = value.codeUnits;
+    v((t << 3) | 2);
+    v(d.length);
+    b.add(d);
+    return this;
+  }
+
+  _Writer integer(int t, int value) {
+    v(t << 3);
+    v(value);
+    return this;
+  }
+
+  Uint8List toBytes() => b.toBytes();
+  void v(int n) {
+    while (n > 127) {
+      b.addByte((n & 127) | 128);
+      n >>= 7;
+    }
+    b.addByte(n);
+  }
+}

lib/features/ads/presentation/ad_media.dart

@@ -0,0 +1,122 @@
+import 'dart:async';
+import 'dart:io' show File;
+
+import 'package:flutter/foundation.dart' show kIsWeb;
+import 'package:flutter/material.dart';
+import 'package:video_player/video_player.dart';
+
+import '../data/ads_api_client.dart';
+
+/// 统一渲染广告图片/GIF/视频；开屏可优先使用已缓存的本地素材。
+class AdMedia extends StatefulWidget {
+  const AdMedia({
+    super.key,
+    required this.ad,
+    this.assetPath,
+    this.fit = BoxFit.cover,
+  });
+  final AdCreative ad;
+  final String? assetPath;
+  final BoxFit fit;
+  @override
+  State<AdMedia> createState() => _AdMediaState();
+}
+
+class _AdMediaState extends State<AdMedia> {
+  VideoPlayerController? player;
+  bool ready = false, failed = false;
+  @override
+  void initState() {
+    super.initState();
+    _load();
+  }
+
+  @override
+  void didUpdateWidget(covariant AdMedia old) {
+    super.didUpdateWidget(old);
+    if (old.ad.adId != widget.ad.adId || old.assetPath != widget.assetPath) {
+      unawaited(player?.dispose() ?? Future.value());
+      player = null;
+      ready = false;
+      failed = false;
+      _load();
+    }
+  }
+
+  void _load() {
+    if (widget.ad.mediaType != AdMediaType.video) return;
+    final uri = widget.ad.mediaUri;
+    if (uri == null) return;
+    final path = widget.assetPath;
+    final controller = !kIsWeb && path != null && path.isNotEmpty
+        ? VideoPlayerController.file(File(path))
+        : VideoPlayerController.networkUrl(uri);
+    player = controller;
+    unawaited(
+      controller
+          .initialize()
+          .then((_) async {
+            await controller.setLooping(true);
+            await controller.setVolume(0);
+            await controller.play();
+            if (mounted) setState(() => ready = true);
+          })
+          .catchError((_) {
+            if (mounted) setState(() => failed = true);
+          }),
+    );
+  }
+
+  @override
+  void dispose() {
+    player?.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (widget.ad.mediaType != AdMediaType.video) {
+      final path = widget.assetPath;
+      if (!kIsWeb && path != null && path.isNotEmpty) {
+        return Image.file(
+          File(path),
+          fit: widget.fit,
+          width: double.infinity,
+          height: double.infinity,
+          errorBuilder: (_, _, _) => _error(),
+        );
+      }
+      return Image.network(
+        widget.ad.imageUrl,
+        fit: widget.fit,
+        width: double.infinity,
+        height: double.infinity,
+        errorBuilder: (_, _, _) => _error(),
+      );
+    }
+    final c = player;
+    if (failed) return _error();
+    if (c == null || !ready) {
+      return const ColoredBox(
+        color: Color(0xFF161616),
+        child: Center(child: CircularProgressIndicator()),
+      );
+    }
+    return FittedBox(
+      fit: widget.fit,
+      clipBehavior: Clip.hardEdge,
+      child: SizedBox(
+        width: c.value.size.width,
+        height: c.value.size.height,
+        child: VideoPlayer(c),
+      ),
+    );
+  }
+
+  Widget _error() => const ColoredBox(
+    color: Color(0xFF161616),
+    child: Center(
+      child: Icon(Icons.broken_image_outlined, color: Colors.white54),
+    ),
+  );
+}

lib/features/ads/presentation/home_ad_banner.dart

@@ -0,0 +1,134 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+import '../../../common/router/app_router.dart';
+import '../data/ads_api_client.dart';
+import 'ad_media.dart';
+
+class HomeAdBanner extends ConsumerStatefulWidget {
+  const HomeAdBanner({super.key});
+  @override
+  ConsumerState<HomeAdBanner> createState() => _HomeAdBannerState();
+}
+
+class _HomeAdBannerState extends ConsumerState<HomeAdBanner> {
+  final pages = PageController();
+  final impressed = <String>{};
+  Timer? timer;
+  int index = 0;
+  int _length = 0;
+  @override
+  void dispose() {
+    timer?.cancel();
+    pages.dispose();
+    super.dispose();
+  }
+
+  void _sync(List<AdCreative> ads) {
+    if (_length == ads.length) return;
+    _length = ads.length;
+    timer?.cancel();
+    if (ads.length > 1) {
+      timer = Timer.periodic(const Duration(seconds: 4), (_) {
+        if (pages.hasClients) {
+          pages.nextPage(
+            duration: const Duration(milliseconds: 320),
+            curve: Curves.easeOut,
+          );
+        }
+      });
+    }
+  }
+
+  void _impression(AdCreative ad, String? id) {
+    if (!impressed.add(ad.adId)) return;
+    unawaited(
+      ref
+          .read(adsApiClientProvider)
+          .report(ad, 'ad_impression', trackingId: id),
+    );
+  }
+
+  Future<void> _open(AdCreative ad, String? tracking) async {
+    final client = ref.read(adsApiClientProvider);
+    final id = client.newClickId();
+    final uri = ad.clickUri(id);
+    if (uri == null) return;
+    unawaited(client.report(ad, 'ad_click', clickId: id, trackingId: tracking));
+    if (!mounted) return;
+    if (ad.openMode == AdOpenMode.inApp) {
+      context.push(
+        '${AppRoutes.web}?url=${Uri.encodeComponent(uri.toString())}',
+      );
+    } else {
+      await launchUrl(uri, mode: LaunchMode.externalApplication);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final async = ref.watch(featuredAdsProvider(homeBannerAdPlacement));
+    return async.maybeWhen(
+      data: (value) {
+        if (!value.hasAds) return const SizedBox.shrink();
+        final ads = value.ads;
+        _sync(ads);
+        WidgetsBinding.instance.addPostFrameCallback((_) {
+          if (mounted) {
+            _impression(ads[index.clamp(0, ads.length - 1)], value.trackingId);
+          }
+        });
+        return Column(
+          children: [
+            AspectRatio(
+              aspectRatio: 750 / 200,
+              child: ClipRRect(
+                borderRadius: BorderRadius.circular(12),
+                child: PageView.builder(
+                  controller: pages,
+                  onPageChanged: (page) {
+                    setState(() => index = page % ads.length);
+                    _impression(ads[index], value.trackingId);
+                  },
+                  itemBuilder: (_, page) {
+                    final ad = ads[page % ads.length];
+                    return GestureDetector(
+                      onTap: () => _open(ad, value.trackingId),
+                      child: AdMedia(ad: ad),
+                    );
+                  },
+                ),
+              ),
+            ),
+            if (ads.length > 1)
+              Padding(
+                padding: const EdgeInsets.only(top: 8),
+                child: Row(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: List.generate(
+                    ads.length,
+                    (i) => Container(
+                      width: i == index ? 14 : 6,
+                      height: 6,
+                      margin: const EdgeInsets.symmetric(horizontal: 3),
+                      decoration: BoxDecoration(
+                        color: i == index
+                            ? Theme.of(context).colorScheme.primary
+                            : Theme.of(context).dividerColor,
+                        borderRadius: BorderRadius.circular(3),
+                      ),
+                    ),
+                  ),
+                ),
+              ),
+          ],
+        );
+      },
+      orElse: () => const SizedBox.shrink(),
+    );
+  }
+}

lib/features/ads/presentation/splash_ad_dialog.dart

@@ -0,0 +1,82 @@
+import 'dart:async';
+import 'package:flutter/material.dart';
+
+import '../application/splash_ad_controller.dart';
+import 'ad_media.dart';
+
+enum SplashAdResult { clicked, skipped, completed }
+
+class SplashAdDialog extends StatefulWidget {
+  const SplashAdDialog({
+    super.key,
+    required this.entry,
+    required this.onClick,
+    required this.onShown,
+  });
+  final SplashAdEntry entry;
+  final Future<void> Function() onClick;
+  final VoidCallback onShown;
+  @override
+  State<SplashAdDialog> createState() => _SplashAdDialogState();
+}
+
+class _SplashAdDialogState extends State<SplashAdDialog> {
+  Timer? timer;
+  late int remain;
+  bool opening = false;
+  @override
+  void initState() {
+    super.initState();
+    remain = widget.entry.ad.countdownSeconds.clamp(1, 5);
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      widget.onShown();
+    });
+    timer = Timer.periodic(const Duration(seconds: 1), (_) {
+      if (remain <= 1) {
+        Navigator.of(context).pop(SplashAdResult.completed);
+      } else if (mounted) {
+        setState(() => remain--);
+      }
+    });
+  }
+
+  @override
+  void dispose() {
+    timer?.cancel();
+    super.dispose();
+  }
+
+  Future<void> open() async {
+    if (opening) return;
+    opening = true;
+    timer?.cancel();
+    await widget.onClick();
+    if (mounted) Navigator.of(context).pop(SplashAdResult.clicked);
+  }
+
+  @override
+  Widget build(BuildContext context) => Material(
+    color: Colors.black,
+    child: Stack(
+      children: [
+        Positioned.fill(
+          child: GestureDetector(
+            onTap: open,
+            child: AdMedia(
+              ad: widget.entry.ad,
+              assetPath: widget.entry.assetPath,
+            ),
+          ),
+        ),
+        Positioned(
+          top: MediaQuery.paddingOf(context).top + 16,
+          right: 18,
+          child: FilledButton(
+            onPressed: () => Navigator.of(context).pop(SplashAdResult.skipped),
+            child: Text('跳过 ${remain}s'),
+          ),
+        ),
+      ],
+    ),
+  );
+}