feat(Apps): introduce Apps tab and related screens for enhanced navigation

- Added a new "Apps" tab in the TabsLayout, providing users with access to various applications.
- Created AppsScreen to display app entries, including a schedule feature with a calendar icon.
- Implemented routing for the schedule and course screens under the new Apps tab structure.
- Updated navigation hrefs to reflect the new Apps section, improving overall user experience.
- Refactored HomeScreen to manage bottom tab visibility based on scroll events, enhancing usability.

src/components/business/PostCard/PostCard.tsx

@@ -63,6 +63,11 @@ function topCommentSignature(tc: PostCardProps['post']['top_comment']): string {
   return [tc.id, tc.content ?? '', tc.author?.id ?? ''].join('\u001f');
 }
 
+function channelSignature(ch: PostCardProps['post']['channel']): string {
+  if (!ch) return '';
+  return [ch.id, ch.name ?? ''].join('\u001f');
+}
+
 function featuresComparable(f: PostCardProps['features']): string {
   if (f == null) return '';
   if (typeof f === 'string') return f;
@@ -103,6 +108,7 @@ function arePostCardPropsEqual(prev: PostCardProps, next: PostCardProps): boolea
   if (authorSignature(a.author) !== authorSignature(b.author)) return false;
   if (imagesSignature(a.images) !== imagesSignature(b.images)) return false;
   if (topCommentSignature(a.top_comment) !== topCommentSignature(b.top_comment)) return false;
+  if (channelSignature(a.channel) !== channelSignature(b.channel)) return false;
 
   return true;
 }
@@ -302,6 +308,15 @@ const PostCardInner: React.FC<PostCardProps> = (normalizedProps) => {
           </Text>
         )}
 
+        {!!post.channel?.name && (
+          <View style={styles.gridChannelRow}>
+            <MaterialCommunityIcons name="tag-outline" size={12} color={colors.text.hint} />
+            <Text style={styles.gridChannelText} numberOfLines={1}>
+              {post.channel.name}
+            </Text>
+          </View>
+        )}
+
         <View style={styles.gridFooter}>
           <TouchableOpacity onPress={handleUserPress} style={styles.gridUserArea}>
             <Avatar source={author?.avatar} size={20} name={author?.nickname || '匿名用户'} />
@@ -331,6 +346,14 @@ const PostCardInner: React.FC<PostCardProps> = (normalizedProps) => {
             {!showGrid && (
               <View style={styles.metaRow}>
                 <PostCardRelativeTime createdAt={post.created_at} style={styles.timeText} />
+                {!!post.channel?.name && (
+                  <View style={styles.channelTag}>
+                    <MaterialCommunityIcons name="tag-outline" size={11} color={colors.primary.main} />
+                    <Text style={styles.channelTagText} numberOfLines={1}>
+                      {post.channel.name}
+                    </Text>
+                  </View>
+                )}
                 {post.is_pinned && (
                   <View style={styles.pinnedTag}>
                     <MaterialCommunityIcons name="pin" size={10} color={colors.warning.main} />
@@ -459,6 +482,23 @@ const styles = StyleSheet.create({
     alignItems: 'center',
     gap: 6,
     marginTop: 2,
+    flexWrap: 'wrap',
+  },
+  channelTag: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    maxWidth: 140,
+    paddingHorizontal: 6,
+    paddingVertical: 2,
+    borderRadius: borderRadius.sm,
+    backgroundColor: `${colors.primary.main}12`,
+    gap: 4,
+  },
+  channelTagText: {
+    fontSize: fontSizes.xs,
+    color: colors.primary.main,
+    fontWeight: '600',
+    flexShrink: 1,
   },
   pinnedTag: {
     flexDirection: 'row',
@@ -606,6 +646,21 @@ const styles = StyleSheet.create({
     paddingTop: 8,
     minHeight: 44,
   },
+  gridChannelRow: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: 4,
+    paddingHorizontal: 8,
+    paddingTop: 4,
+    paddingBottom: 2,
+  },
+  gridChannelText: {
+    fontSize: fontSizes.xs,
+    color: colors.text.secondary,
+    fontWeight: '600',
+    flex: 1,
+    minWidth: 0,
+  },
   gridFooter: {
     flexDirection: 'row',
     alignItems: 'center',