refactor(database): migrate to new modular database layer and unify data access

- Remove legacy database.ts, LocalDataSource.ts, and MessageRepository.ts
- Create new src/database/ module with messageRepository, userCacheRepository, conversationRepository, and groupCacheRepository
- Update all consumers to import from @/database instead of services/database
- Add web platform blur handling for modal components to fix focus issues
- Flatten SystemMessageItem and NotificationsScreen styles for consistent design
- Add draggable slider in ChatSettingsScreen and dynamic font size support
- Introduce 9 new chat color themes
- Add profile screens for about, terms, and privacy policy with navigation routes
- Add policy links to login and registration screens
- Fix post share URL format from /posts/ to /post/

src/stores/message/services/MessageSyncService.ts

@@ -9,13 +9,7 @@
 
 import type { ConversationResponse, MessageResponse } from '../../../types/dto';
 import { messageService } from '../../../services/messageService';
-import {
-  getMessagesByConversation,
-  getMaxSeq,
-  saveMessagesBatch,
-  saveConversationsWithRelatedCache,
-  getMessagesBeforeSeq,
-} from '../../../services/database';
+import { messageRepository, conversationRepository } from '@/database';
 import {
   type IConversationListPagedSource,
   SqliteConversationListPagedSource,
@@ -213,8 +207,8 @@ export class MessageSyncService implements IMessageSyncService {
         // 先从本地数据库加载
         if (!hasInMemoryMessages) {
           try {
-            const localMessages = await getMessagesByConversation(conversationId, 20);
-            const localMaxSeq = await getMaxSeq(conversationId);
+            const localMessages = await messageRepository.getByConversation(conversationId, 20);
+            const localMaxSeq = await messageRepository.getMaxSeq(conversationId);
             baselineMaxSeq = localMaxSeq;
 
             if (localMessages.length > 0) {
@@ -249,7 +243,7 @@ export class MessageSyncService implements IMessageSyncService {
             store.setMessages(conversationId, mergedSnapshot);
 
             // 持久化到本地
-            saveMessagesBatch(snapshotMessages.map((m: any) => ({
+            messageRepository.saveMessagesBatch(snapshotMessages.map((m: any) => ({
               id: m.id,
               conversationId: m.conversation_id || conversationId,
               senderId: m.sender_id,
@@ -276,7 +270,7 @@ export class MessageSyncService implements IMessageSyncService {
               const mergedMessages = mergeMessagesById(existingMessages, newMessages);
               store.setMessages(conversationId, mergedMessages);
 
-              saveMessagesBatch(newMessages.map((m: any) => ({
+              messageRepository.saveMessagesBatch(newMessages.map((m: any) => ({
                 id: m.id,
                 conversationId: m.conversation_id || conversationId,
                 senderId: m.sender_id,
@@ -306,20 +300,20 @@ export class MessageSyncService implements IMessageSyncService {
 
           store.setMessages(conversationId, mergedMessages);
 
-          saveMessagesBatch(newMessages.map((m: any) => ({
-            id: m.id,
-            conversationId: m.conversation_id || conversationId,
-            senderId: m.sender_id,
-            content: m.content,
-            type: m.type || 'text',
-            isRead: m.is_read || false,
-            createdAt: m.created_at,
-            seq: m.seq,
-            status: m.status || 'normal',
-            segments: m.segments,
-          }))).catch(error => {
-            console.error('[MessageSyncService] 保存消息到本地失败:', error);
-          });
+            messageRepository.saveMessagesBatch(newMessages.map((m: any) => ({
+              id: m.id,
+              conversationId: m.conversation_id || conversationId,
+              senderId: m.sender_id,
+              content: m.content,
+              type: m.type || 'text',
+              isRead: m.is_read || false,
+              createdAt: m.created_at,
+              seq: m.seq,
+              status: m.status || 'normal',
+              segments: m.segments,
+            }))).catch(error => {
+              console.error('[MessageSyncService] 保存消息到本地失败:', error);
+            });
         }
       }
     } catch (error) {
@@ -348,7 +342,7 @@ export class MessageSyncService implements IMessageSyncService {
     
     try {
       // 先从本地获取
-      const localMessages = await getMessagesBeforeSeq(conversationId, beforeSeq, limit);
+      const localMessages = await messageRepository.getBeforeSeq(conversationId, beforeSeq, limit);
 
       if (localMessages.length >= limit) {
         const formattedMessages: MessageResponse[] = [...localMessages].reverse().map(m => ({
@@ -374,7 +368,7 @@ export class MessageSyncService implements IMessageSyncService {
       if (response?.messages && response.messages.length > 0) {
         const serverMessages = response.messages;
 
-        await saveMessagesBatch(serverMessages.map((m: any) => ({
+        await messageRepository.saveMessagesBatch(serverMessages.map((m: any) => ({
           id: m.id,
           conversationId: m.conversation_id || conversationId,
           senderId: m.sender_id,
@@ -497,7 +491,7 @@ export class MessageSyncService implements IMessageSyncService {
       .map(conv => conv.group)
       .filter((group): group is NonNullable<ConversationResponse['group']> => Boolean(group));
 
-    saveConversationsWithRelatedCache(list, users, groups).catch(error => {
+    conversationRepository.saveWithRelated(list, users, groups).catch(error => {
       console.error('[MessageSyncService] 持久化会话列表失败:', error);
     });
   }