feat(apps): 重构 UI 架构为 presentation 层并新增 l10n 国际化支持

apps/lib/features/chat/presentation/bloc/ag_ui_event_label.dart

@@ -0,0 +1,20 @@
+import '../../../../core/l10n/l10n.dart';
+import '../../data/models/ag_ui_event.dart';
+
+String agUiEventLabel(AgUiEventType type) {
+  final l10n = L10n.current;
+  return switch (type) {
+    AgUiEventType.runStarted => l10n.agUiEventRunStarted,
+    AgUiEventType.runFinished => l10n.agUiEventRunFinished,
+    AgUiEventType.runError => l10n.agUiEventRunError,
+    AgUiEventType.stepStarted => l10n.agUiEventStepStarted,
+    AgUiEventType.stepFinished => l10n.agUiEventStepFinished,
+    AgUiEventType.textMessageEnd => l10n.agUiEventTextMessageEnd,
+    AgUiEventType.toolCallStart => l10n.agUiEventToolCallStart,
+    AgUiEventType.toolCallArgs => l10n.agUiEventToolCallArgs,
+    AgUiEventType.toolCallEnd => l10n.agUiEventToolCallEnd,
+    AgUiEventType.toolCallResult => l10n.agUiEventToolCallResult,
+    AgUiEventType.toolCallError => l10n.agUiEventToolCallError,
+    AgUiEventType.unknown => l10n.agUiEventUnknown,
+  };
+}

apps/lib/features/chat/presentation/bloc/agent_stage.dart

@@ -1,3 +1,5 @@
+import '../../../../core/l10n/l10n.dart';
+
 enum AgentStage { routing, execution, memory }
 
 AgentStage? stageFromStepName(String value) {
@@ -15,9 +17,9 @@ AgentStage? stageFromStepName(String value) {
 
 String stageLabel(AgentStage? stage) {
   return switch (stage) {
-    AgentStage.routing => '意图识别中',
-    AgentStage.execution => '任务执行中',
-    AgentStage.memory => '记忆提取中',
-    null => '任务处理中',
+    AgentStage.routing => L10n.current.agentStageRouting,
+    AgentStage.execution => L10n.current.agentStageExecution,
+    AgentStage.memory => L10n.current.agentStageMemory,
+    null => L10n.current.agentStageProcessing,
   };
 }

apps/lib/features/chat/presentation/bloc/chat_bloc.dart

@@ -2,7 +2,8 @@ import 'dart:typed_data';
 
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:image_picker/image_picker.dart';
-import 'package:social_app/core/api/i_api_client.dart';
+import 'package:social_app/core/network/i_api_client.dart';
+import 'package:social_app/core/l10n/l10n.dart';
 
 import '../../data/models/ag_ui_event.dart';
 import '../../data/models/chat_list_item.dart';
@@ -130,7 +131,9 @@ class ChatBloc extends Cubit<ChatState> {
           ).copyWith(
             items: _markActiveToolCallsFailed(
               state.items,
-              reason: isCanceledByUser ? '本次运行已取消' : '本次运行已失败',
+              reason: isCanceledByUser
+                  ? L10n.current.chatRunCanceled
+                  : L10n.current.chatRunFailed,
             ),
           ),
         );
@@ -428,7 +431,9 @@ class ChatBloc extends Cubit<ChatState> {
           isCancelling: false,
           currentStage: null,
           error: sseClosedBeforeTerminal
-              ? (recoveredFromHistory ? null : '连接中断，请重试')
+              ? (recoveredFromHistory
+                    ? null
+                    : L10n.current.chatSseInterruptedRetry)
               : error.toString(),
         ),
       );