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

apps/lib/features/messages/data/inbox_api.dart

@@ -1,4 +1,4 @@
-import 'package:social_app/core/api/i_api_client.dart';
+import 'package:social_app/core/network/i_api_client.dart';
 
 class InboxApi {
   final IApiClient _client;

apps/lib/features/messages/presentation/screens/message_invite_detail_screen.dart

@@ -1,14 +1,16 @@
 import 'package:flutter/material.dart' hide BackButton;
 import 'package:go_router/go_router.dart';
+import 'package:intl/intl.dart';
 
-import '../../../../core/di/injection.dart';
+import '../../../../app/di/injection.dart';
+import '../../../../core/l10n/l10n.dart';
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_loading_indicator.dart';
 import '../../../../shared/widgets/page_header.dart';
 import '../../../../shared/widgets/toast/toast.dart';
 import '../../../../shared/widgets/toast/toast_type.dart';
 import '../../../calendar/data/calendar_api.dart';
-import '../../../users/data/users_api.dart';
+import '../../../contacts/data/users/users_api.dart';
 import '../../data/inbox_api.dart';
 
 class MessageInviteDetailScreen extends StatefulWidget {
@@ -64,7 +66,7 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
         }
       }
       if (message == null) {
-        throw StateError('邀请不存在或已失效');
+        throw StateError(L10n.current.messagesInviteDetailNotFound);
       }
 
       String? calendarTitle;
@@ -121,13 +123,21 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
       if (!mounted) {
         return;
       }
-      Toast.show(context, '已接受邀请', type: ToastType.success);
+      Toast.show(
+        context,
+        context.l10n.messagesInviteAcceptedToast,
+        type: ToastType.success,
+      );
       await _loadDetail();
     } catch (_) {
       if (!mounted) {
         return;
       }
-      Toast.show(context, '操作失败，请稍后重试', type: ToastType.error);
+      Toast.show(
+        context,
+        context.l10n.messagesInviteOperationFailed,
+        type: ToastType.error,
+      );
     } finally {
       if (mounted) {
         setState(() => _submitting = false);
@@ -149,13 +159,21 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
       if (!mounted) {
         return;
       }
-      Toast.show(context, '已拒绝邀请', type: ToastType.success);
+      Toast.show(
+        context,
+        context.l10n.messagesInviteRejectedToast,
+        type: ToastType.success,
+      );
       await _loadDetail();
     } catch (_) {
       if (!mounted) {
         return;
       }
-      Toast.show(context, '操作失败，请稍后重试', type: ToastType.error);
+      Toast.show(
+        context,
+        context.l10n.messagesInviteOperationFailed,
+        type: ToastType.error,
+      );
     } finally {
       if (mounted) {
         setState(() => _submitting = false);
@@ -212,18 +230,21 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
   Widget _buildSummaryCard() {
     final message = _message;
     final statusText = message == null
-        ? '未知'
+        ? context.l10n.commonUnknown
         : switch (message.status) {
-            InboxMessageStatus.pending => '待处理',
-            InboxMessageStatus.accepted => '已接受',
-            InboxMessageStatus.rejected => '已拒绝',
-            InboxMessageStatus.dismissed => '已处理',
+            InboxMessageStatus.pending => context.l10n.messagesStatusPending,
+            InboxMessageStatus.accepted =>
+              context.l10n.messagesInviteStatusAccepted,
+            InboxMessageStatus.rejected =>
+              context.l10n.messagesInviteStatusRejected,
+            InboxMessageStatus.dismissed =>
+              context.l10n.messagesInviteStatusHandled,
           };
 
     final createdAt = message?.createdAt;
     final createdAtText = createdAt == null
-        ? '未知'
-        : '${createdAt.year}-${createdAt.month.toString().padLeft(2, '0')}-${createdAt.day.toString().padLeft(2, '0')} ${createdAt.hour.toString().padLeft(2, '0')}:${createdAt.minute.toString().padLeft(2, '0')}';
+        ? context.l10n.commonUnknown
+        : DateFormat.yMd(context.l10n.localeName).add_Hm().format(createdAt);
 
     return Container(
       width: double.infinity,
@@ -236,8 +257,8 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          const Text(
-            '日历邀请详情',
+          Text(
+            context.l10n.messagesInviteDetailTitle,
             style: TextStyle(
               fontSize: 16,
               fontWeight: FontWeight.w600,
@@ -246,7 +267,9 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
           ),
           const SizedBox(height: 10),
           Text(
-            '事件：${_calendarTitle ?? '未命名日程'}',
+            context.l10n.messagesInviteEvent(
+              _calendarTitle ?? context.l10n.messagesInviteUnnamedEvent,
+            ),
             style: const TextStyle(
               fontSize: 14,
               fontWeight: FontWeight.w500,
@@ -255,7 +278,9 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
           ),
           const SizedBox(height: 10),
           Text(
-            '邀请人：${_senderName ?? '未知用户'}',
+            context.l10n.messagesInviteSender(
+              _senderName ?? context.l10n.messagesInviteUnknownUser,
+            ),
             style: const TextStyle(
               fontSize: 13,
               fontWeight: FontWeight.normal,
@@ -264,7 +289,7 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
           ),
           const SizedBox(height: 10),
           Text(
-            '消息时间：$createdAtText',
+            context.l10n.messagesInviteTime(createdAtText),
             style: const TextStyle(
               fontSize: 13,
               fontWeight: FontWeight.normal,
@@ -273,7 +298,7 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
           ),
           const SizedBox(height: 10),
           Text(
-            '状态：$statusText',
+            context.l10n.messagesInviteStatus(statusText),
             style: const TextStyle(
               fontSize: 13,
               fontWeight: FontWeight.normal,
@@ -282,7 +307,7 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
           ),
           const SizedBox(height: 10),
           Text(
-            '邀请ID：${widget.inviteId}',
+            context.l10n.messagesInviteId(widget.inviteId),
             style: const TextStyle(
               fontSize: 13,
               fontWeight: FontWeight.normal,
@@ -303,14 +328,14 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
         borderRadius: BorderRadius.circular(12),
         border: Border.all(color: AppColors.messageTipBorder),
       ),
-      child: const Row(
+      child: Row(
         children: [
-          Icon(Icons.info_outline, size: 14, color: AppColors.slate500),
-          SizedBox(width: 8),
+          const Icon(Icons.info_outline, size: 14, color: AppColors.slate500),
+          const SizedBox(width: 8),
           Expanded(
             child: Text(
-              '同意后将加入该日历事件，拒绝后该邀请会被标记为已处理',
-              style: TextStyle(
+              context.l10n.messagesInviteTip,
+              style: const TextStyle(
                 fontSize: 12,
                 fontWeight: FontWeight.normal,
                 color: AppColors.slate500,
@@ -332,8 +357,8 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
           borderRadius: BorderRadius.circular(12),
           border: Border.all(color: AppColors.messageCardBorder),
         ),
-        child: const Text(
-          '该邀请已处理，无需重复操作',
+        child: Text(
+          context.l10n.messagesInviteAlreadyHandled,
           style: TextStyle(
             fontSize: 13,
             fontWeight: FontWeight.w500,
@@ -357,10 +382,10 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
                   borderRadius: BorderRadius.circular(12),
                   border: Border.all(color: AppColors.messageRejectBorder),
                 ),
-                child: const Row(
+                child: Row(
                   mainAxisAlignment: MainAxisAlignment.center,
                   children: [
-                    Text(
+                    const Text(
                       '×',
                       style: TextStyle(
                         fontSize: 15,
@@ -368,10 +393,10 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
                         color: AppColors.red400,
                       ),
                     ),
-                    SizedBox(width: 6),
+                    const SizedBox(width: 6),
                     Text(
-                      '拒绝',
-                      style: TextStyle(
+                      context.l10n.messagesReject,
+                      style: const TextStyle(
                         fontSize: 14,
                         fontWeight: FontWeight.w600,
                         color: AppColors.red400,
@@ -392,10 +417,10 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
                   borderRadius: BorderRadius.circular(12),
                   border: Border.all(color: AppColors.messageAcceptBorder),
                 ),
-                child: const Row(
+                child: Row(
                   mainAxisAlignment: MainAxisAlignment.center,
                   children: [
-                    Text(
+                    const Text(
                       '√',
                       style: TextStyle(
                         fontSize: 15,
@@ -403,10 +428,10 @@ class _MessageInviteDetailScreenState extends State<MessageInviteDetailScreen> {
                         color: AppColors.blue600,
                       ),
                     ),
-                    SizedBox(width: 6),
+                    const SizedBox(width: 6),
                     Text(
-                      '同意',
-                      style: TextStyle(
+                      context.l10n.messagesAccept,
+                      style: const TextStyle(
                         fontSize: 14,
                         fontWeight: FontWeight.w600,
                         color: AppColors.blue600,

apps/lib/features/messages/presentation/screens/message_invite_list_screen.dart

@@ -1,17 +1,18 @@
 import 'package:flutter/material.dart' hide BackButton;
 import 'package:go_router/go_router.dart';
 
-import '../../../../core/di/injection.dart';
-import '../../../../core/router/app_routes.dart';
+import '../../../../app/di/injection.dart';
+import '../../../../app/router/app_routes.dart';
+import '../../../../core/l10n/l10n.dart';
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_loading_indicator.dart';
 import '../../../../shared/widgets/app_pull_refresh_feedback.dart';
 import '../../../../shared/widgets/page_header.dart';
 import '../../../../shared/widgets/toast/toast.dart';
 import '../../../../shared/widgets/toast/toast_type.dart';
-import '../../../friends/data/friends_api.dart';
+import '../../../contacts/data/friends_api.dart';
 import '../../data/inbox_api.dart';
-import '../../ui/widgets/message_action_sheet.dart';
+import '../../presentation/widgets/message_action_sheet.dart';
 
 class MessageWithFriend {
   final InboxMessageResponse message;
@@ -108,7 +109,11 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
         _isLoading = false;
         _isPullRefreshing = false;
       });
-      Toast.show(context, '消息加载失败，请稍后重试', type: ToastType.error);
+      Toast.show(
+        context,
+        context.l10n.messagesLoadFailed,
+        type: ToastType.error,
+      );
     }
   }
 
@@ -148,7 +153,11 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
         return;
       case InboxMessageType.friendRequest:
         if (item.friendRequest == null) {
-          Toast.show(context, '发送者信息加载失败，请下拉重试', type: ToastType.error);
+          Toast.show(
+            context,
+            context.l10n.messagesSenderLoadFailed,
+            type: ToastType.error,
+          );
           return;
         }
         _showFriendRequestSheet(item, isReadOnly: message.isRead);
@@ -171,14 +180,16 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
     final friendRequest = item.friendRequest;
     if (friendRequest == null) return;
 
-    final title = '${friendRequest.sender.username} 请求添加您为好友';
+    final title = context.l10n.messagesFriendRequestTitle(
+      friendRequest.sender.username,
+    );
     final description = message.content?['message'] as String?;
     final statusText = isReadOnly
         ? (friendRequest.status == 'accepted'
-              ? '已接受'
+              ? context.l10n.messagesInviteStatusAccepted
               : friendRequest.status == 'rejected'
-              ? '已拒绝'
-              : '已处理')
+              ? context.l10n.messagesInviteStatusRejected
+              : context.l10n.messagesInviteStatusHandled)
         : null;
 
     showModalBottomSheet<void>(
@@ -213,7 +224,11 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
     final message = item.message;
     final friendshipId = message.friendshipId;
     if (friendshipId == null) {
-      Toast.show(context, '好友请求数据缺失', type: ToastType.error);
+      Toast.show(
+        context,
+        context.l10n.messagesFriendRequestMissing,
+        type: ToastType.error,
+      );
       return;
     }
 
@@ -221,19 +236,31 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
       if (accept) {
         await _friendsApi.acceptRequest(friendshipId);
         if (mounted) {
-          Toast.show(context, '已接受好友请求', type: ToastType.success);
+          Toast.show(
+            context,
+            context.l10n.messagesAcceptedFriendRequest,
+            type: ToastType.success,
+          );
         }
       } else {
         await _friendsApi.declineRequest(friendshipId);
         if (mounted) {
-          Toast.show(context, '已拒绝好友请求', type: ToastType.success);
+          Toast.show(
+            context,
+            context.l10n.messagesRejectedFriendRequest,
+            type: ToastType.success,
+          );
         }
       }
       await _inboxApi.markAsRead(message.id);
       await _loadMessages();
     } catch (e) {
       if (mounted) {
-        Toast.show(context, '处理失败，请稍后重试', type: ToastType.error);
+        Toast.show(
+          context,
+          context.l10n.messagesActionFailed,
+          type: ToastType.error,
+        );
       }
     }
   }
@@ -289,9 +316,21 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
       ),
       child: Row(
         children: [
-          Expanded(child: _buildTab(0, '未读', Icons.mark_email_unread_outlined)),
+          Expanded(
+            child: _buildTab(
+              0,
+              context.l10n.messagesTabUnread,
+              Icons.mark_email_unread_outlined,
+            ),
+          ),
           const SizedBox(width: 4),
-          Expanded(child: _buildTab(1, '已读', Icons.mark_email_read_outlined)),
+          Expanded(
+            child: _buildTab(
+              1,
+              context.l10n.messagesTabRead,
+              Icons.mark_email_read_outlined,
+            ),
+          ),
         ],
       ),
     );
@@ -412,7 +451,9 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
           ),
           const SizedBox(height: 16),
           Text(
-            isUnread ? '暂无未读消息' : '暂无已读消息',
+            isUnread
+                ? context.l10n.messagesEmptyUnreadTitle
+                : context.l10n.messagesEmptyReadTitle,
             style: const TextStyle(
               fontSize: 16,
               fontWeight: FontWeight.w500,
@@ -421,7 +462,9 @@ class _MessageInviteListScreenState extends State<MessageInviteListScreen> {
           ),
           const SizedBox(height: 8),
           Text(
-            isUnread ? '有新消息时会在这里显示' : '处理过的消息会显示在这里',
+            isUnread
+                ? context.l10n.messagesEmptyUnreadDesc
+                : context.l10n.messagesEmptyReadDesc,
             style: const TextStyle(fontSize: 13, color: AppColors.slate400),
           ),
         ],
@@ -506,15 +549,17 @@ class _MessageCard extends StatelessWidget {
   String _title() {
     if (message.messageType == InboxMessageType.friendRequest) {
       if (friendRequest == null) {
-        return '好友请求信息加载失败';
+        return L10n.current.messagesFriendRequestLoadFailed;
       }
-      return '${friendRequest!.sender.username} 请求添加您为好友';
+      return L10n.current.messagesFriendRequestTitle(
+        friendRequest!.sender.username,
+      );
     }
     if (message.messageType == InboxMessageType.calendar) {
       final data = message.content;
-      return data?['title'] as String? ?? '日历邀请';
+      return data?['title'] as String? ?? L10n.current.messagesCalendarInvite;
     }
-    return '系统消息';
+    return L10n.current.messagesSystemMessage;
   }
 
   String _content() {
@@ -523,23 +568,24 @@ class _MessageCard extends StatelessWidget {
       if (message.content != null) {
         data = message.content;
       }
-      if (data == null) return '点击查看详情';
+      if (data == null) return L10n.current.messagesTapToView;
 
       final type = data['type'] as String?;
       if (type == 'invite') {
         final status = message.status.value;
         if (status == 'pending') {
-          return '邀请您加入日历';
+          return L10n.current.messagesInviteJoinCalendar;
         } else if (status == 'accepted') {
-          return '已接受日历邀请';
+          return L10n.current.messagesInviteAccepted;
         } else if (status == 'rejected') {
-          return '已拒绝日历邀请';
+          return L10n.current.messagesInviteRejected;
         }
       } else if (type == 'update') {
-        return '更新了日历事件';
+        return L10n.current.messagesCalendarUpdated;
       }
-      return '点击查看详情';
+      return L10n.current.messagesTapToView;
     }
-    return message.content?['message'] as String? ?? '点击查看详情';
+    return message.content?['message'] as String? ??
+        L10n.current.messagesTapToView;
   }
 }

apps/lib/features/messages/presentation/widgets/calendar_message_card.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:social_app/core/l10n/l10n.dart';
 
 import '../../../../core/theme/design_tokens.dart';
 import '../../../../shared/widgets/app_button.dart';
@@ -23,6 +24,8 @@ class CalendarInviteCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = context.l10n;
+
     return Container(
       margin: const EdgeInsets.symmetric(
         horizontal: AppSpacing.md,
@@ -52,17 +55,22 @@ class CalendarInviteCard extends StatelessWidget {
                 ),
               ),
               const SizedBox(width: AppSpacing.sm),
-              const Expanded(
+              Expanded(
                 child: Text(
-                  '日历邀请',
-                  style: TextStyle(fontWeight: FontWeight.w600, fontSize: 14),
+                  l10n.messagesCalendarCardInviteTitle,
+                  style: const TextStyle(
+                    fontWeight: FontWeight.w600,
+                    fontSize: 14,
+                  ),
                 ),
               ),
             ],
           ),
           const SizedBox(height: AppSpacing.sm),
           Text(
-            eventTitle != null ? '邀请你访问 "$eventTitle"' : '邀请你访问日历',
+            eventTitle != null
+                ? l10n.messagesCalendarCardInviteWithTitle(eventTitle!)
+                : l10n.messagesCalendarCardInviteWithoutTitle,
             style: const TextStyle(fontSize: 14, color: AppColors.slate700),
           ),
           const SizedBox(height: AppSpacing.md),
@@ -70,14 +78,17 @@ class CalendarInviteCard extends StatelessWidget {
             children: [
               Expanded(
                 child: AppButton(
-                  text: '拒绝',
+                  text: l10n.messagesReject,
                   isOutlined: true,
                   onPressed: onReject,
                 ),
               ),
               const SizedBox(width: AppSpacing.sm),
               Expanded(
-                child: AppButton(text: '接受', onPressed: onAccept),
+                child: AppButton(
+                  text: l10n.messagesAccept,
+                  onPressed: onAccept,
+                ),
               ),
             ],
           ),
@@ -100,6 +111,8 @@ class CalendarUpdateCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = context.l10n;
+
     return GestureDetector(
       onTap: onTap,
       child: Container(
@@ -133,7 +146,9 @@ class CalendarUpdateCard extends StatelessWidget {
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   Text(
-                    eventTitle != null ? '$eventTitle 已更新' : '日历事件已更新',
+                    eventTitle != null
+                        ? l10n.messagesCalendarCardUpdatedWithTitle(eventTitle!)
+                        : l10n.messagesCalendarCardUpdatedWithoutTitle,
                     style: const TextStyle(
                       fontSize: 14,
                       fontWeight: FontWeight.w500,
@@ -141,7 +156,7 @@ class CalendarUpdateCard extends StatelessWidget {
                   ),
                   const SizedBox(height: 2),
                   Text(
-                    _formatTime(message.createdAt),
+                    _formatTime(context, message.createdAt),
                     style: const TextStyle(
                       fontSize: 12,
                       color: AppColors.slate500,
@@ -157,17 +172,18 @@ class CalendarUpdateCard extends StatelessWidget {
     );
   }
 
-  String _formatTime(DateTime time) {
+  String _formatTime(BuildContext context, DateTime time) {
+    final l10n = context.l10n;
     final now = DateTime.now();
     final diff = now.difference(time);
     if (diff.inMinutes < 60) {
-      return '${diff.inMinutes}分钟前';
+      return l10n.messagesCalendarCardTimeMinutesAgo(diff.inMinutes);
     } else if (diff.inHours < 24) {
-      return '${diff.inHours}小时前';
+      return l10n.messagesCalendarCardTimeHoursAgo(diff.inHours);
     } else if (diff.inDays < 7) {
-      return '${diff.inDays}天前';
+      return l10n.messagesCalendarCardTimeDaysAgo(diff.inDays);
     } else {
-      return '${time.month}月${time.day}日';
+      return l10n.messagesCalendarCardTimeDate(time.month, time.day);
     }
   }
 }
@@ -184,6 +200,8 @@ class CalendarDeleteCard extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final l10n = context.l10n;
+
     return Container(
       margin: const EdgeInsets.symmetric(
         horizontal: AppSpacing.md,
@@ -212,7 +230,9 @@ class CalendarDeleteCard extends StatelessWidget {
           const SizedBox(width: AppSpacing.sm),
           Expanded(
             child: Text(
-              eventTitle != null ? '$eventTitle 已删除' : '日历事件已删除',
+              eventTitle != null
+                  ? l10n.messagesCalendarCardDeletedWithTitle(eventTitle!)
+                  : l10n.messagesCalendarCardDeletedWithoutTitle,
               style: const TextStyle(fontSize: 14, color: AppColors.slate500),
             ),
           ),

apps/lib/features/messages/presentation/widgets/message_action_sheet.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import '../../../../core/theme/design_tokens.dart';
+import '../../../../core/l10n/l10n.dart';
 import '../../../../shared/widgets/app_button.dart';
 
 class MessageActionSheet extends StatelessWidget {
@@ -98,7 +99,7 @@ class MessageActionSheet extends StatelessWidget {
               children: [
                 Expanded(
                   child: AppButton(
-                    text: '拒绝',
+                    text: context.l10n.messagesReject,
                     isOutlined: true,
                     onPressed: () {
                       Navigator.pop(context);
@@ -109,7 +110,7 @@ class MessageActionSheet extends StatelessWidget {
                 const SizedBox(width: AppSpacing.md),
                 Expanded(
                   child: AppButton(
-                    text: '接受',
+                    text: context.l10n.messagesAccept,
                     onPressed: () {
                       Navigator.pop(context);
                       onAccept?.call();