feat(app): P0 batch 3 — offline detection with engine pause/resume + UI banner
P0-4 离线感知: - connectivity_plus → NetworkAvailability(online/offline/unknown) - engine_scope 三重绑定:有账号+有网 → start;任一失去 → stop(在途不中断) - 网络恢复 → start + onNetworkRestored(waitingNetwork 即时重试) - HomePage 顶部离线黄条(wifi_off + i18n 双语) P0-5 更正:EXIF 方向已由服务端 sharp .rotate() 自动转正——v2 分析误报 397/397 全绿、analyze 0 Co-Authored-By: Claude Code <noreply@anthropic.com>
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@@ -15,6 +15,7 @@ library;
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import '../../core/api_client.dart';
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import '../../core/network_status.dart';
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import 'providers.dart';
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import 'upload_engine.dart';
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@@ -49,14 +50,29 @@ final sessionAccountProvider =
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/// 引擎生命周期绑定:账号在场 → start;离场 → stop(任务保留库内)。
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///
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/// P0-4 离线感知:**离线 → stop(暂停再出队,在途不受影响)**;
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/// **恢复 → start + onNetworkRestored(立即重试 waitingNetwork)**。
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/// 引擎与账号/网络三重绑定:有账号且有网才出队,任一失去即停。
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///
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/// 返回当前 scope 账号(null=引擎停止);仅被 App 壳 watch 时生效
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/// (Provider 惰性求值)。
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final uploadEngineScopeProvider = Provider<String?>((ref) {
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final account = ref.watch(sessionAccountProvider).value;
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final engine = ref.watch(uploadEngineProvider);
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if (account != null) {
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// P0-4:网络状态(offline 时不出队;unknown 视为有网)。
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final network = ref.watch(networkStatusProvider).value;
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final online = isNetworkOnline(network);
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if (account != null && online) {
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// 恢复在线且已有账号 → start(幂等:已 start 则只刷新 timer)。
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engine.start(account);
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// 网络从 offline → online 的跃变触发即时重试。
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if (network == NetworkAvailability.online) {
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engine.onNetworkRestored();
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}
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} else {
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// 离线(或无账号)→ stop(不中断在途;恢复时上面的 start 恢复出队)。
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engine.stop();
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}
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ref.onDispose(engine.stop);
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