feat(Notification): implement notification preferences management and enhance notification handling

- Introduced a new service for managing notification preferences, including push notifications, sound, and vibration settings.
- Updated the notification handling logic to respect user preferences, ensuring notifications are displayed according to user settings.
- Refactored the App and various screens to integrate the new notification preferences, improving user experience and consistency.
- Enhanced the HomeScreen and NotificationSettingsScreen to load and update notification settings seamlessly.
- Implemented a mechanism to hide the bottom tab bar based on scroll events, improving navigation usability.

src/data/mappers/PostMapper.ts

@@ -25,6 +25,10 @@ export class PostMapper {
       isTop: response.is_pinned || false,
       status: (response.status || 'published') as 'published' | 'draft' | 'deleted',
       channelId: response.channel_id,
+      channel:
+        response.channel && response.channel.id
+          ? { id: String(response.channel.id), name: String(response.channel.name || '') }
+          : undefined,
       tags: [],
       createdAt: new Date(response.created_at || Date.now()),
       // 空字符串/缺省时用 created_at，避免误用 Date.now() 导致全部显示「刚修改」

src/data/models/index.ts

@@ -86,6 +86,8 @@ export interface PostModel {
   isTop: boolean;
   status: 'published' | 'draft' | 'deleted';
   channelId?: string;
+  /** 频道展示用（与 PostDTO.channel 一致） */
+  channel?: { id: string; name: string } | null;
   tags?: string[];
   createdAt: Date;
   updatedAt: Date;

src/data/repositories/PostRepository.ts

@@ -42,6 +42,7 @@ interface PostApiResponse {
   created_at: string;
   updated_at: string;
   content_edited_at?: string;
+  channel?: { id: string; name: string } | null;
   author?: {
     id: number;
     username: string;
@@ -125,6 +126,7 @@ export class PostRepository implements IPostRepository {
       isPinned: model.isTop,
       status: model.status,
       channelId: model.channelId,
+      channel: model.channel,
       tags: model.tags || [],
       createdAt: model.createdAt.toISOString(),
       updatedAt: model.updatedAt.toISOString(),