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

apps/lib/shared/widgets/message_composer.dart

@@ -2,6 +2,7 @@ import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:lucide_icons/lucide_icons.dart';
 
+import '../../core/l10n/l10n.dart';
 import '../../core/theme/design_tokens.dart';
 import 'app_loading_indicator.dart';
 
@@ -37,10 +38,10 @@ class MessageComposer extends StatelessWidget {
     required this.onHoldToSpeakCancel,
     required this.textInputChild,
     required this.recordingAnimation,
-    this.holdToSpeakText = '按住说话',
-    this.recordingText = '松开发送',
-    this.transcribingText = '语音识别中...',
-    this.recordingHintText = '松开发送，上滑取消',
+    this.holdToSpeakText,
+    this.recordingText,
+    this.transcribingText,
+    this.recordingHintText,
     this.showRecordingInlineFeedback = true,
   });
 
@@ -58,10 +59,10 @@ class MessageComposer extends StatelessWidget {
   final VoidCallback onHoldToSpeakCancel;
   final Widget textInputChild;
   final Widget recordingAnimation;
-  final String holdToSpeakText;
-  final String recordingText;
-  final String transcribingText;
-  final String recordingHintText;
+  final String? holdToSpeakText;
+  final String? recordingText;
+  final String? transcribingText;
+  final String? recordingHintText;
   final bool showRecordingInlineFeedback;
 
   bool get _isHoldMode => mode == MessageComposerMode.holdToSpeak;
@@ -193,12 +194,20 @@ class MessageComposer extends StatelessWidget {
   }
 
   Widget _buildHoldToSpeakContent() {
+    final l10n = L10n.current;
+    final resolvedRecordingText =
+        recordingText ?? l10n.homeRecordingReleaseSend;
+    final resolvedRecordingHintText =
+        recordingHintText ?? l10n.homeRecordingHintReleaseSend;
+    final resolvedTranscribingText = transcribingText ?? l10n.homeTranscribing;
+    final resolvedHoldToSpeakText = holdToSpeakText ?? l10n.homeHoldToSpeakText;
+
     if (_isRecording) {
       if (!showRecordingInlineFeedback) {
         return Align(
           alignment: Alignment.center,
           child: Text(
-            recordingText,
+            resolvedRecordingText,
             style: const TextStyle(color: AppColors.slate700),
           ),
         );
@@ -210,12 +219,12 @@ class MessageComposer extends StatelessWidget {
           recordingAnimation,
           const SizedBox(height: AppSpacing.xs),
           Text(
-            recordingText,
+            resolvedRecordingText,
             style: const TextStyle(color: AppColors.slate700),
           ),
           const SizedBox(height: AppSpacing.xs),
           Text(
-            recordingHintText,
+            resolvedRecordingHintText,
             key: messageComposerRecordingHintKey,
             style: const TextStyle(color: AppColors.slate500),
           ),
@@ -227,7 +236,7 @@ class MessageComposer extends StatelessWidget {
       return Align(
         alignment: Alignment.center,
         child: Text(
-          transcribingText,
+          resolvedTranscribingText,
           style: const TextStyle(color: AppColors.slate500),
         ),
       );
@@ -236,7 +245,7 @@ class MessageComposer extends StatelessWidget {
     return Align(
       alignment: Alignment.center,
       child: Text(
-        holdToSpeakText,
+        resolvedHoldToSpeakText,
         style: const TextStyle(color: AppColors.slate500),
       ),
     );