refactor: restructure core architecture and responsive system

This commit implements a major architectural refactor to improve modularity, type safety, and maintainability across the codebase.

Key changes include:
- **Responsive System Refactor**: Migrated from a monolithic `useResponsive` hook to a set of specialized, granular hooks (`useBreakpoint`, `useOrientation`, `usePlatform`, etc.) located in `src/presentation/hooks/responsive`. This reduces unnecessary re-renders and improves developer experience.
- **Core Service Restructuring**: Introduced a new directory structure for services, including dedicated folders for `datasources`, `mappers`, and domain-specific types (`message`, `post`).
- **Data Layer Improvements**:
    - Centralized JSON parsing logic in `src/database/core/jsonUtils.ts`.
    - Cleaned up repository implementations by removing redundant local utility functions.
    - Refactored `MessageMapper` to use the new centralized JSON utility.
- **Type System Cleanup**:
    - Decomposed the large `src/types/dto.ts` into a modular `src/types/dto/` directory.
    - Simplified `src/types/index.ts` and introduced backward-compatible aliases for core entities.
- **Utility Consolidation**:
    - Created a centralized `src/utils/formatTime.ts` to replace fragmented date formatting logic across various screens and components.
    - Removed deprecated responsive utility files in favor of the new hook-based system.
- **Service Logic Refinement**: Refactored `ApiClient` and `WebSocketService` to use a centralized `showVerificationModal` service, removing duplicated state management for verification prompts.

src/screens/message/MessageListScreen.tsx

@@ -38,6 +38,7 @@ import {
   type AppColors,
 } from '../../theme';
 import { ConversationResponse, UserDTO, MessageResponse, extractTextFromSegments } from '../../types/dto';
+import { formatTime as formatTimeUtil } from '../../utils/formatTime';
 import { authService } from '../../services';
 import { blurActiveElement } from '../../infrastructure/platform';
 import { useUserStore, useAuthStore } from '../../stores';
@@ -52,7 +53,7 @@ import {
   useMessageStore,
 } from '../../stores';
 import { Avatar, Text, EmptyState, ResponsiveContainer, AppBackButton } from '../../components/common';
-import { useResponsive, useBreakpointGTE } from '../../hooks/useResponsive';
+import { useResponsive, useBreakpointGTE } from '../../hooks';
 import * as hrefs from '../../navigation/hrefs';
 // 导入 ChatScreen 组件用于桌面端双栏布局
 import { ChatScreen } from './ChatScreen';
@@ -245,32 +246,7 @@ export const MessageListScreen: React.FC = () => {
 
   // 格式化时间（稳定引用，配合会话行 memo）
   const formatTime = useCallback((dateString: string): string => {
-    if (!dateString) return '';
-    try {
-      const date = new Date(dateString);
-      if (Number.isNaN(date.getTime())) return '';
-      const now = new Date();
-      const diffInHours = (now.getTime() - date.getTime()) / (1000 * 60 * 60);
-
-      if (diffInHours < 24 && date.getDate() === now.getDate()) {
-        return date.toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit' });
-      }
-
-      const yesterday = new Date(now);
-      yesterday.setDate(yesterday.getDate() - 1);
-      if (date.getDate() === yesterday.getDate()) {
-        return '昨天';
-      }
-
-      if (diffInHours < 24 * 7) {
-        const days = ['周日', '周一', '周二', '周三', '周四', '周五', '周六'];
-        return days[date.getDay()];
-      }
-
-      return `${date.getMonth() + 1}/${date.getDate()}`;
-    } catch {
-      return '';
-    }
+    return formatTimeUtil(dateString);
   }, []);
 
   // 跳转到聊天页