refactor(Post, PostMapper, PostRepository, CreatePostScreen, HomeScreen): update communityId to channelId for improved clarity

- Renamed communityId to channelId across Post entity, PostMapper, and PostRepository for consistency and clarity.
- Updated CreatePostScreen to include channel selection functionality, enhancing user experience when creating posts.
- Adjusted HomeScreen to support filtering posts by channel, improving content organization.
- Refactored related interfaces and services to align with the new channelId terminology, ensuring a cohesive codebase.

app/(app)/(tabs)/_layout.tsx

@@ -9,7 +9,7 @@ import { useTotalUnreadCount } from '../../../src/stores';
 
 const TAB_BAR_HEIGHT = 56;
 const TAB_BAR_FLOATING_MARGIN = 12;
-const TAB_BAR_MARGIN = 24;
+const TAB_BAR_MARGIN = 20;
 
 export default function TabsLayout() {
   const { width } = useWindowDimensions();

src/core/entities/Post.ts

@@ -75,8 +75,8 @@ export interface Post {
   isPinned: boolean;
   /** 帖子状态 */
   status: PostStatus;
-  /** 所属社区ID */
+  /** 所属频道ID */
-  communityId?: string;
+  channelId?: string;
   /** 标签列表 */
   tags: string[];
   /** 创建时间 */
@@ -113,8 +113,8 @@ export interface Post {
   updated_at?: string;
   /** @deprecated 请使用 contentEditedAt */
   content_edited_at?: string;
-  /** @deprecated 请使用 communityId */
+  /** @deprecated 请使用 channelId */
-  community_id?: string;
+  channel_id?: string;
   /** @deprecated 请使用 status */
   status_str?: string;
   /** 投票帖子标识 (部分旧代码使用) */
@@ -168,7 +168,7 @@ export const createPost = (data: Partial<Post>): Post => ({
   isFavorited: data.isFavorited || false,
   isPinned: data.isPinned || false,
   status: data.status || 'published',
-  communityId: data.communityId,
+  channelId: data.channelId,
   tags: data.tags || [],
   createdAt: data.createdAt || new Date().toISOString(),
   updatedAt: data.updatedAt || new Date().toISOString(),

src/data/mappers/PostMapper.ts

@@ -24,7 +24,7 @@ export class PostMapper {
       isFavorited: response.is_favorited || false,
       isTop: response.is_pinned || false,
       status: (response.status || 'published') as 'published' | 'draft' | 'deleted',
-      communityId: response.community_id,
+      channelId: response.channel_id,
       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」
@@ -58,8 +58,8 @@ export class PostMapper {
     if (model.images !== undefined) {
       request.images = model.images;
     }
-    if (model.communityId !== undefined) {
+    if (model.channelId !== undefined) {
-      request.community_id = model.communityId;
+      request.channel_id = model.channelId;
     }
     if (model.tags !== undefined) {
       request.tags = model.tags;
@@ -75,7 +75,7 @@ export class PostMapper {
     title: string,
     content: string,
     images?: string[],
-    communityId?: string
+    channelId?: string
   ): Record<string, any> {
     const request: Record<string, any> = {
       title,
@@ -84,8 +84,8 @@ export class PostMapper {
     if (images && images.length > 0) {
       request.images = images;
     }
-    if (communityId) {
+    if (channelId) {
-      request.community_id = communityId;
+      request.channel_id = channelId;
     }
     return request;
   }

src/data/models/index.ts

@@ -85,7 +85,7 @@ export interface PostModel {
   isFavorited: boolean;
   isTop: boolean;
   status: 'published' | 'draft' | 'deleted';
-  communityId?: string;
+  channelId?: string;
   tags?: string[];
   createdAt: Date;
   updatedAt: Date;

src/data/repositories/PostRepository.ts

@@ -37,7 +37,7 @@ interface PostApiResponse {
   is_favorited: boolean;
   is_pinned: boolean;
   status: string;
-  community_id?: string;
+  channel_id?: string;
   tags?: string[];
   created_at: string;
   updated_at: string;
@@ -124,7 +124,7 @@ export class PostRepository implements IPostRepository {
       isFavorited: model.isFavorited,
       isPinned: model.isTop,
       status: model.status,
-      communityId: model.communityId,
+      channelId: model.channelId,
       tags: model.tags || [],
       createdAt: model.createdAt.toISOString(),
       updatedAt: model.updatedAt.toISOString(),
@@ -143,7 +143,7 @@ export class PostRepository implements IPostRepository {
       created_at: model.createdAt.toISOString(),
       updated_at: model.updatedAt.toISOString(),
       content_edited_at: response.content_edited_at,
-      community_id: model.communityId,
+      channel_id: model.channelId,
     };
   }
 
@@ -250,7 +250,7 @@ export class PostRepository implements IPostRepository {
         queryParams.cursor = params.cursor;
       }
       if (params?.post_type) queryParams.tab = params.post_type;
-      if (params?.communityId) queryParams.community_id = params.communityId;
+      if (params?.channelId) queryParams.channel_id = params.channelId;
       if (params?.authorId) queryParams.author_id = params.authorId;
       if (params?.tags && params.tags.length > 0) queryParams.tags = params.tags.join(',');
       if (params?.status) queryParams.status = params.status;
@@ -364,7 +364,7 @@ export class PostRepository implements IPostRepository {
       if (params.page) queryParams.page = params.page;
       if (params.pageSize) queryParams.page_size = params.pageSize;
       if (params.scope) queryParams.scope = params.scope;
-      if (params.communityId) queryParams.community_id = params.communityId;
+      if (params.channelId) queryParams.channel_id = params.channelId;
 
       const response = await this.api.get<PostsListApiResponse>('/posts/search', queryParams);
 
@@ -398,7 +398,7 @@ export class PostRepository implements IPostRepository {
         data.title,
         data.content,
         data.images?.map(img => img.url),
-        data.communityId
+        data.channelId
       );
 
       if (data.tags && data.tags.length > 0) {

src/data/repositories/interfaces/IPostRepository.ts

@@ -19,8 +19,8 @@ export interface GetPostsParams {
   cursor?: string;
   /** 帖子类型筛选（可选）：follow, hot, latest */
   post_type?: 'follow' | 'hot' | 'latest';
-  /** 社区ID过滤 */
+  /** 频道ID过滤 */
-  communityId?: string;
+  channelId?: string;
   /** 作者ID过滤 */
   authorId?: string;
   /** 标签过滤 */
@@ -45,8 +45,8 @@ export interface CreatePostData {
   content: string;
   /** 图片列表 */
   images?: PostImage[];
-  /** 所属社区ID */
+  /** 所属频道ID */
-  communityId?: string;
+  channelId?: string;
   /** 标签列表 */
   tags?: string[];
   /** 帖子状态 */
@@ -97,8 +97,8 @@ export interface SearchPostsParams {
   pageSize?: number;
   /** 搜索范围：标题、内容、或全部 */
   scope?: 'title' | 'content' | 'all';
-  /** 社区ID过滤 */
+  /** 频道ID过滤 */
-  communityId?: string;
+  channelId?: string;
 }
 
 // ==================== Repository 接口 ====================

src/infrastructure/diff/postTypes.ts

@@ -113,7 +113,7 @@ export interface BasePostUpdate {
   /** 更新时间戳 */
   timestamp: number;
   /** 社区 ID（可选） */
-  communityId?: string;
+  channelId?: string;
   /** 载荷数据（可选，用于合并更新） */
   payload?: Record<string, any>;
 }

src/screens/create/CreatePostScreen.tsx

@@ -19,14 +19,15 @@ import {
   Platform,
   Animated,
   Image,
+  useWindowDimensions,
 } from 'react-native';
 import { SafeAreaView } from 'react-native-safe-area-context';
 import { useRouter, useLocalSearchParams, useNavigation } from 'expo-router';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import * as ImagePicker from 'expo-image-picker';
 import { colors, spacing, fontSizes, borderRadius, shadows } from '../../theme';
-import { Text, Button, ResponsiveContainer, AppBackButton } from '../../components/common';
+import { Text, ResponsiveContainer } from '../../components/common';
-import { postService, showPrompt, voteService } from '../../services';
+import { channelService, postService, showPrompt, voteService } from '../../services';
 import { ApiError } from '../../services/api';
 import { uploadService } from '../../services/uploadService';
 import VoteEditor from '../../components/business/VoteEditor';
@@ -40,6 +41,10 @@ interface CreatePostScreenProps {
 
 const MAX_TITLE_LENGTH = 100;
 const MAX_CONTENT_LENGTH = 2000;
+type ChannelOption = {
+  id: string;
+  name: string;
+};
 
 // 表情面板高度
 const EMOJI_PANEL_HEIGHT = 280;
@@ -88,13 +93,14 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
   
   // 响应式布局
   const { isWideScreen, width } = useResponsive();
+  const { height: windowHeight } = useWindowDimensions();
   
   const [title, setTitle] = useState('');
   const [content, setContent] = useState('');
   const [images, setImages] = useState<{ uri: string; uploading?: boolean }[]>([]);
-  const [tags, setTags] = useState<string[]>([]);
+  const [channelOptions, setChannelOptions] = useState<ChannelOption[]>([]);
-  const [tagInput, setTagInput] = useState('');
+  const [selectedChannelId, setSelectedChannelId] = useState<string | null>(null);
-  const [showTagInput, setShowTagInput] = useState(false);
+  const [showChannelPicker, setShowChannelPicker] = useState(false);
   const [showEmojiPanel, setShowEmojiPanel] = useState(false);
   const [posting, setPosting] = useState(false);
   const [loadingPost, setLoadingPost] = useState(false);
@@ -118,6 +124,11 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
     ? Math.min(width, 800) - spacing.lg * 2 
     : width - spacing.lg * 2;
   const imageSize = (availableWidth - imageGap * (imagesPerRow - 1)) / imagesPerRow;
+  const contentInputMinHeight = Math.max(
+    isWideScreen ? 460 : 320,
+    Math.floor(windowHeight * (isWideScreen ? 0.56 : 0.5))
+  );
+  const contentSectionMinHeight = Math.floor(windowHeight * (isWideScreen ? 0.68 : 0.62));
 
   React.useEffect(() => {
     Animated.parallel([
@@ -134,16 +145,19 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
     ]).start();
   }, []);
 
+  React.useEffect(() => {
+    const loadChannels = async () => {
+      const list = await channelService.list();
+      setChannelOptions(list.map(item => ({ id: item.id, name: item.name })));
+    };
+    loadChannels();
+  }, []);
+
   React.useLayoutEffect(() => {
     navigation.setOptions({
-      headerShown: true,
+      headerShown: false,
-      title: isEditMode ? '编辑帖子' : '发布帖子',
-      // 当作为 Modal 使用时，显示关闭按钮
-      headerLeft: onClose ? () => (
-        <AppBackButton onPress={onClose} icon="close" />
-      ) : undefined,
     });
-  }, [navigation, isEditMode, onClose]);
+  }, [navigation]);
 
   React.useEffect(() => {
     if (!isEditMode || !editPostID) {
@@ -264,20 +278,11 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
     setImages(images.filter((_, i) => i !== index));
   };
 
-  // 添加标签
+   // 选择频道（单选，可再次点击取消）
-  const handleAddTag = useCallback(() => {
+  const handleSelectChannel = useCallback((channelId: string) => {
-    const tag = tagInput.trim().replace(/^#/, '');
+    setSelectedChannelId(prev => (prev === channelId ? null : channelId));
-    if (tag && !tags.includes(tag) && tags.length < 5) {
+    setShowChannelPicker(false);
-      setTags([...tags, tag]);
+  }, []);
-      setTagInput('');
-      setShowTagInput(false);
-    }
-  }, [tagInput, tags]);
-
-  // 删除标签
-  const handleRemoveTag = (tag: string) => {
-    setTags(tags.filter(t => t !== tag));
-  };
 
   // 插入表情
   const handleInsertEmoji = (emoji: string) => {
@@ -290,7 +295,7 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
   // 关闭所有面板
   const closeAllPanels = () => {
     setShowEmojiPanel(false);
-    setShowTagInput(false);
+    setShowChannelPicker(false);
   };
 
   // 切换表情面板
@@ -299,10 +304,10 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
     setShowEmojiPanel(!showEmojiPanel);
   };
 
-  // 切换标签输入
+  // 切换频道选择
-  const handleToggleTagInput = () => {
+  const handleToggleChannelPicker = () => {
     closeAllPanels();
-    setShowTagInput(!showTagInput);
+    setShowChannelPicker(!showChannelPicker);
   };
 
   // 切换投票模式
@@ -373,6 +378,7 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
           title: title.trim(),
           content: content.trim(),
           images: imageUrls,
+          channel_id: selectedChannelId || undefined,
           vote_options: validOptions,
         });
         showPrompt({
@@ -405,6 +411,7 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
             title: title.trim(),
             content: content.trim(),
             images: imageUrls,
+            channel_id: selectedChannelId || undefined,
           });
           showPrompt({
             type: 'info',
@@ -474,66 +481,80 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
     );
   };
 
-  // 渲染标签
+  // 渲染频道（单选）
-  const renderTags = () => {
+  const renderChannelPicker = () => {
-    if (tags.length === 0 && !showTagInput) return null;
+    if (!showChannelPicker) return null;
 
     return (
       <View style={styles.tagsSection}>
         <View style={styles.tagsContainer}>
-          {tags.map((tag, index) => (
+          {channelOptions.map((channel) => {
-            <View key={index} style={styles.tag}>
+            const isSelected = selectedChannelId === channel.id;
-              <MaterialCommunityIcons name="pound" size={12} color={colors.primary.main} />
+            return (
-              <Text variant="caption" color={colors.primary.main} style={styles.tagText}>{tag}</Text>
-              {/* 独立的删除按钮 */}
               <TouchableOpacity
-                style={styles.tagDeleteButton}
+                key={channel.id}
-                onPress={() => handleRemoveTag(tag)}
+                style={[styles.tag, isSelected && styles.channelSelected]}
-                hitSlop={{ top: 5, right: 5, bottom: 5, left: 5 }}
+                onPress={() => handleSelectChannel(channel.id)}
               >
-                <MaterialCommunityIcons name="close-circle" size={14} color={colors.primary.main} />
+                <Text
-              </TouchableOpacity>
+                  variant="caption"
-            </View>
+                  color={isSelected ? colors.primary.contrast : colors.text.secondary}
-          ))}
+                  style={styles.tagText}
-          {tags.length < 5 && showTagInput && (
+                >
-            <View style={styles.tagInputWrapper}>
+                  {channel.name}
-              <MaterialCommunityIcons name="pound" size={14} color={colors.primary.main} />
+                </Text>
-              <TextInput
-                style={styles.tagInput}
-                value={tagInput}
-                onChangeText={setTagInput}
-                placeholder="输入话题"
-                placeholderTextColor={colors.text.hint}
-                onSubmitEditing={handleAddTag}
-                returnKeyType="done"
-                autoFocus
-                maxLength={20}
-              />
-              <TouchableOpacity onPress={() => { setTagInput(''); setShowTagInput(false); }} style={styles.tagCancelButton}>
-                <MaterialCommunityIcons name="close" size={16} color={colors.text.secondary} />
-              </TouchableOpacity>
-              <TouchableOpacity onPress={handleAddTag} style={styles.tagConfirmButton}>
-                <MaterialCommunityIcons name="check" size={16} color={colors.primary.main} />
               </TouchableOpacity>
+            );
+          })}
         </View>
+        {channelOptions.length === 0 && (
+          <Text variant="caption" color={colors.text.hint}>暂无可用频道</Text>
         )}
-          {tags.length < 5 && !showTagInput && (
-            <TouchableOpacity style={styles.addTagButton} onPress={() => setShowTagInput(true)}>
-              <MaterialCommunityIcons name="plus" size={14} color={colors.text.secondary} />
-              <Text variant="caption" color={colors.text.secondary} style={styles.addTagText}>话题</Text>
-            </TouchableOpacity>
-          )}
-        </View>
       </View>
     );
   };
 
+  const selectedChannelName = React.useMemo(() => {
+    if (!selectedChannelId) return '';
+    return channelOptions.find(c => c.id === selectedChannelId)?.name || '';
+  }, [selectedChannelId, channelOptions]);
+
+  const renderChannelEntryRow = () => (
+    <TouchableOpacity
+      style={styles.channelEntryRow}
+      onPress={handleToggleChannelPicker}
+      activeOpacity={0.8}
+    >
+      <Text variant="body" color={colors.text.secondary} style={styles.channelEntryLabel}>
+        发表至：
+      </Text>
+      <View style={styles.channelEntryValueWrap}>
+        <Text
+          variant="body"
+          color={selectedChannelName ? colors.text.primary : colors.text.hint}
+          style={styles.channelEntryValue}
+        >
+          {selectedChannelName || '选择频道'}
+        </Text>
+        <MaterialCommunityIcons name="chevron-right" size={18} color={colors.text.hint} />
+      </View>
+    </TouchableOpacity>
+  );
+
   // 渲染投票编辑器
   const renderVoteEditor = () => {
     if (!isVotePost) return null;
 
     return (
       <View style={isWideScreen && styles.voteEditorWide}>
+        <View style={styles.voteEditorHeaderRow}>
+          <Text variant="caption" color={colors.text.secondary}>
+            已插入投票
+          </Text>
+          <TouchableOpacity onPress={() => setIsVotePost(false)} activeOpacity={0.7}>
+            <Text variant="caption" color={colors.primary.main}>移除投票</Text>
+          </TouchableOpacity>
+        </View>
         <VoteEditor
           options={voteOptions}
           onAddOption={handleAddVoteOption}
@@ -549,7 +570,12 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
 
   // 渲染内容输入区
   const renderContentSection = () => (
-    <View style={styles.contentSection}>
+    <View
+      style={[
+        styles.contentSection,
+        contentSectionMinHeight ? { minHeight: contentSectionMinHeight } : null,
+      ]}
+    >
       {/* 标题输入 */}
       <TextInput
         style={[
@@ -569,6 +595,7 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
         style={[
           styles.contentInput,
           isWideScreen && styles.contentInputWide,
+          { minHeight: contentInputMinHeight },
         ]}
         value={content}
         onChangeText={setContent}
@@ -579,6 +606,10 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
         maxLength={MAX_CONTENT_LENGTH}
         onSelectionChange={(e) => setSelection(e.nativeEvent.selection)}
       />
+
+      {/* 作为正文容器的子模块，追加在文本后面 */}
+      {renderImageGrid()}
+      {renderVoteEditor()}
     </View>
   );
 
@@ -642,25 +673,6 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
           </View>
         </TouchableOpacity>
 
-        <TouchableOpacity
-          style={styles.toolbarButton}
-          onPress={handleToggleTagInput}
-          disabled={tags.length >= 5 || posting}
-        >
-          <View style={styles.toolbarButtonInner}>
-            <MaterialCommunityIcons
-              name="pound"
-              size={24}
-              color={tags.length >= 5 ? colors.text.disabled : (showTagInput ? colors.primary.main : colors.text.secondary)}
-            />
-            {tags.length > 0 && (
-              <View style={styles.tagBadge}>
-                <Text style={styles.tagBadgeText}>{tags.length}</Text>
-              </View>
-            )}
-          </View>
-        </TouchableOpacity>
-
         <TouchableOpacity
           style={styles.toolbarButton}
           onPress={handleToggleEmojiPanel}
@@ -690,36 +702,54 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
           </View>
         </TouchableOpacity>
       </View>
+    </View>
+  );
 
-      {/* 右侧发布按钮 */}
+  const renderTopActionBar = () => (
-      <View style={styles.toolbarRight}>
+    <View style={styles.topActionBar}>
-        <Text variant="caption" color={colors.text.hint} style={styles.charCount}>
+      <TouchableOpacity
+        onPress={() => (onClose ? onClose() : router.back())}
+        style={styles.topActionButton}
+        activeOpacity={0.7}
+      >
+        <Text variant="body" color={colors.text.secondary}>取消</Text>
+      </TouchableOpacity>
+
+      <View style={styles.topActionCenter}>
+        <Text variant="body" color={colors.text.primary} style={styles.topActionTitle}>
+          {isEditMode ? '编辑帖子' : '发布帖子'}
+        </Text>
+        <Text variant="caption" color={colors.text.hint} style={styles.topActionCount}>
           {content.length}/{MAX_CONTENT_LENGTH}
         </Text>
+      </View>
+
       <TouchableOpacity
-          style={[
-            styles.postButton,
-            (!content.trim() || posting) && styles.postButtonDisabled
-          ]}
         onPress={handlePost}
         disabled={!content.trim() || posting}
+        style={[
+          styles.topActionButton,
+          styles.topActionButtonRight,
+          (!content.trim() || posting) && styles.topActionButtonDisabled,
+        ]}
         activeOpacity={0.8}
       >
-          {posting ? (
+        <Text
-            <MaterialCommunityIcons name="loading" size={18} color={colors.primary.contrast} />
+          variant="body"
-          ) : (
+          color={!content.trim() || posting ? colors.text.hint : colors.primary.main}
-            <Text variant="body" color={colors.primary.contrast} style={styles.postButtonText}>
+          style={styles.topActionPublishText}
-              {isEditMode ? '保存' : '发布'}
+        >
+          {posting ? '发布中' : '发布'}
         </Text>
-          )}
       </TouchableOpacity>
     </View>
-    </View>
   );
 
   // 渲染主内容
   const renderMainContent = () => (
     <>
+      {renderTopActionBar()}
+
       <ScrollView
         contentContainerStyle={styles.scrollContent}
         showsVerticalScrollIndicator={false}
@@ -727,17 +757,13 @@ export const CreatePostScreen: React.FC<CreatePostScreenProps> = (props) => {
       >
         {/* 内容输入区 */}
         {renderContentSection()}
-
-        {/* 投票编辑器 */}
-        {renderVoteEditor()}
-
-        {/* 图片网格 */}
-        {renderImageGrid()}
-
-        {/* 标签 */}
-        {renderTags()}
       </ScrollView>
 
+      {renderChannelEntryRow()}
+
+      {/* 频道选择面板 */}
+      {renderChannelPicker()}
+
       {/* 表情面板 - 位于底部工具栏上方 */}
       {renderEmojiPanel()}
 
@@ -788,10 +814,48 @@ const styles = StyleSheet.create({
     backgroundColor: colors.background.paper,
   },
   scrollContent: {
+    flexGrow: 1,
     paddingBottom: spacing.xl,
   },
+  topActionBar: {
+    height: 52,
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    paddingHorizontal: spacing.lg,
+    borderBottomWidth: StyleSheet.hairlineWidth,
+    borderBottomColor: colors.divider,
+    backgroundColor: colors.background.paper,
+  },
+  topActionButton: {
+    minWidth: 44,
+    height: 36,
+    justifyContent: 'center',
+  },
+  topActionButtonRight: {
+    alignItems: 'flex-end',
+  },
+  topActionButtonDisabled: {
+    opacity: 0.7,
+  },
+  topActionTitle: {
+    fontSize: fontSizes.lg,
+    fontWeight: '600',
+  },
+  topActionCenter: {
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  topActionCount: {
+    marginTop: 2,
+    fontSize: fontSizes.xs,
+  },
+  topActionPublishText: {
+    fontWeight: '600',
+  },
   // 内容输入区
   contentSection: {
+    flexGrow: 1,
     paddingHorizontal: spacing.lg,
     paddingTop: spacing.md,
   },
@@ -806,22 +870,21 @@ const styles = StyleSheet.create({
     fontSize: fontSizes.xl,
   },
   contentInput: {
+    flexGrow: 1,
     fontSize: fontSizes.md,
     color: colors.text.primary,
-    minHeight: 120,
     lineHeight: 22,
     paddingVertical: spacing.sm,
   },
   contentInputWide: {
     fontSize: fontSizes.lg,
     lineHeight: 26,
-    minHeight: 150,
   },
   // 图片网格
   imageGrid: {
     flexDirection: 'row',
     flexWrap: 'wrap',
-    paddingHorizontal: spacing.lg,
+    paddingHorizontal: 0,
     paddingTop: spacing.md,
     gap: 8,
   },
@@ -866,7 +929,11 @@ const styles = StyleSheet.create({
   // 标签
   tagsSection: {
     paddingHorizontal: spacing.lg,
-    paddingTop: spacing.lg,
+    paddingTop: spacing.md,
+    paddingBottom: spacing.sm,
+    borderTopWidth: StyleSheet.hairlineWidth,
+    borderTopColor: colors.divider,
+    backgroundColor: colors.background.paper,
   },
   tagsContainer: {
     flexDirection: 'row',
@@ -874,60 +941,19 @@ const styles = StyleSheet.create({
     gap: spacing.sm,
   },
   tag: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    backgroundColor: colors.primary.light + '15',
-    borderRadius: borderRadius.full,
-    paddingLeft: spacing.sm,
-    paddingRight: spacing.xs,
-    paddingVertical: spacing.xs,
-  },
-  tagText: {
-    marginLeft: spacing.xs,
-    fontWeight: '500',
-  },
-  tagDeleteButton: {
-    marginLeft: spacing.xs,
-    padding: 2,
-  },
-  tagInputWrapper: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    backgroundColor: colors.background.default,
-    borderRadius: borderRadius.full,
-    paddingLeft: spacing.sm,
-    paddingRight: spacing.xs,
-    paddingVertical: spacing.xs,
-    borderWidth: 1,
-    borderColor: colors.primary.main,
-  },
-  tagInput: {
-    fontSize: fontSizes.sm,
-    color: colors.text.primary,
-    minWidth: 80,
-    marginLeft: spacing.xs,
-    padding: 0,
-  },
-  tagCancelButton: {
-    padding: spacing.xs,
-    marginRight: spacing.xs,
-  },
-  tagConfirmButton: {
-    padding: spacing.xs,
-  },
-  addTagButton: {
-    flexDirection: 'row',
-    alignItems: 'center',
     backgroundColor: colors.background.default,
     borderRadius: borderRadius.full,
     paddingHorizontal: spacing.md,
     paddingVertical: spacing.xs,
     borderWidth: 1,
     borderColor: colors.divider,
-    borderStyle: 'dashed',
   },
-  addTagText: {
+  channelSelected: {
-    marginLeft: spacing.xs,
+    backgroundColor: colors.primary.main,
+    borderColor: colors.primary.main,
+  },
+  tagText: {
+    fontWeight: '500',
   },
   // 投票编辑器宽屏样式
   voteEditorWide: {
@@ -935,7 +961,36 @@ const styles = StyleSheet.create({
     alignSelf: 'center',
     width: '100%',
   },
+  voteEditorHeaderRow: {
+    marginHorizontal: spacing.lg,
+    marginTop: spacing.md,
+    marginBottom: -spacing.sm,
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+  },
   // 底部工具栏
+  channelEntryRow: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    justifyContent: 'space-between',
+    paddingHorizontal: spacing.lg,
+    paddingVertical: spacing.sm,
+    borderTopWidth: StyleSheet.hairlineWidth,
+    borderTopColor: colors.divider,
+    backgroundColor: colors.background.paper,
+  },
+  channelEntryLabel: {
+    fontSize: fontSizes.md,
+  },
+  channelEntryValueWrap: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: spacing.xs,
+  },
+  channelEntryValue: {
+    fontSize: fontSizes.md,
+  },
   toolbar: {
     flexDirection: 'row',
     justifyContent: 'space-between',
@@ -951,11 +1006,6 @@ const styles = StyleSheet.create({
     alignItems: 'center',
     gap: spacing.xs,
   },
-  toolbarRight: {
-    flexDirection: 'row',
-    alignItems: 'center',
-    gap: spacing.md,
-  },
   toolbarButton: {
     position: 'relative',
   },
@@ -966,41 +1016,6 @@ const styles = StyleSheet.create({
     justifyContent: 'center',
     alignItems: 'center',
   },
-  tagBadge: {
-    position: 'absolute',
-    top: 4,
-    right: 4,
-    minWidth: 16,
-    height: 16,
-    borderRadius: 8,
-    backgroundColor: colors.primary.main,
-    justifyContent: 'center',
-    alignItems: 'center',
-  },
-  tagBadgeText: {
-    color: colors.primary.contrast,
-    fontSize: fontSizes.xs,
-    fontWeight: '600',
-  },
-  charCount: {
-    fontSize: fontSizes.xs,
-  },
-  postButton: {
-    backgroundColor: colors.primary.main,
-    paddingHorizontal: spacing.lg,
-    paddingVertical: spacing.sm,
-    borderRadius: borderRadius.full,
-    minWidth: 64,
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  postButtonDisabled: {
-    backgroundColor: colors.text.disabled,
-  },
-  postButtonText: {
-    fontWeight: '600',
-    fontSize: fontSizes.sm,
-  },
   // 表情面板
   emojiPanel: {
     height: EMOJI_PANEL_HEIGHT,

src/screens/home/HomeScreen.tsx

@@ -9,6 +9,9 @@ import {
   View,
   FlatList,
   ScrollView,
+  LayoutAnimation,
+  Platform,
+  UIManager,
   StyleSheet,
   RefreshControl,
   StatusBar,
@@ -26,7 +29,7 @@ import { colors, spacing, borderRadius, shadows } from '../../theme';
 import { Post } from '../../types';
 import { useUserStore } from '../../stores';
 import { useCurrentUser } from '../../stores/authStore';
-import { postService } from '../../services';
+import { channelService, postService } from '../../services';
 import { PostCard, TabBar, SearchBar } from '../../components/business';
 import type { PostCardAction } from '../../components/business/PostCard';
 import { Loading, EmptyState, Text, ImageGallery, ImageGridItem, ResponsiveGrid } from '../../components/common';
@@ -37,17 +40,19 @@ import { SearchScreen } from './SearchScreen';
 import { CreatePostScreen } from '../create/CreatePostScreen';
 import * as hrefs from '../../navigation/hrefs';
 
-const TABS = ['最新', '关注', '热门'];
+const TABS = ['关注', '最新', '热门'];
-const TAB_ICONS = ['clock-outline', 'account-heart-outline', 'fire'];
+const TAB_ICONS = ['account-heart-outline', 'clock-outline', 'fire'];
 const DEFAULT_PAGE_SIZE = 20;
 const SWIPE_TRANSLATION_THRESHOLD = 40;
 const SWIPE_COOLDOWN_MS = 300;
 const MOBILE_TAB_BAR_HEIGHT = 64;
 const MOBILE_TAB_FLOATING_MARGIN = 12;
 const MOBILE_FAB_GAP = 12;
+const CAPSULE_HIDE_THRESHOLD = 24;
 
 type ViewMode = 'list' | 'grid';
 type PostType = 'follow' | 'hot' | 'latest';
+type LatestCapsule = { id: string; name: string };
 
 export const HomeScreen: React.FC = () => {
   const router = useRouter();
@@ -68,8 +73,11 @@ export const HomeScreen: React.FC = () => {
   const responsiveGap = useResponsiveSpacing({ xs: 4, sm: 6, md: 8, lg: 12, xl: 16 });
   const responsivePadding = useResponsiveSpacing({ xs: 8, sm: 12, md: 16, lg: 24, xl: 32 });
   
-  const [activeIndex, setActiveIndex] = useState(0);
+  const [activeIndex, setActiveIndex] = useState(1);
   const [viewMode, setViewMode] = useState<ViewMode>('list');
+  const [latestCapsules, setLatestCapsules] = useState<LatestCapsule[]>([{ id: '', name: '全部' }]);
+  const [activeCapsuleId, setActiveCapsuleId] = useState('');
+  const [showLatestCapsules, setShowLatestCapsules] = useState(true);
   
   // 图片查看器状态
   const [showImageViewer, setShowImageViewer] = useState(false);
@@ -88,8 +96,13 @@ export const HomeScreen: React.FC = () => {
   
   // 网格模式滚动位置检测
   const gridScrollYRef = useRef(0);
+  const listScrollYRef = useRef(0);
   const isLoadingMoreRef = useRef(false);
 
+  if (Platform.OS === 'android' && UIManager.setLayoutAnimationEnabledExperimental) {
+    UIManager.setLayoutAnimationEnabledExperimental(true);
+  }
+
   // 构建一个以 postId 为 key 的 map，用于快速查找
   const postsMap = useMemo(() => {
     const map = new Map<string, Post>();
@@ -102,15 +115,36 @@ export const HomeScreen: React.FC = () => {
   // 获取当前 tab 对应的帖子类型
   const getPostType = useCallback((): PostType => {
     switch (activeIndex) {
-      case 0: return 'latest';
+      case 0: return 'follow';
-      case 1: return 'follow';
+      case 1: return 'latest';
       case 2: return 'hot';
       default: return 'latest';
     }
   }, [activeIndex]);
 
+  const isLatestTab = activeIndex === 1;
+  const currentChannelId = isLatestTab && activeCapsuleId ? activeCapsuleId : undefined;
+
+  const updateCapsuleVisibilityByScroll = useCallback((nextY: number, previousY: number) => {
+    if (!isLatestTab) return;
+    const delta = nextY - previousY;
+    const isScrollingDown = delta > CAPSULE_HIDE_THRESHOLD;
+    const isScrollingUp = delta < -CAPSULE_HIDE_THRESHOLD;
+
+    if (isScrollingDown && showLatestCapsules) {
+      LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
+      setShowLatestCapsules(false);
+    } else if (isScrollingUp && !showLatestCapsules) {
+      LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
+      setShowLatestCapsules(true);
+    }
+  }, [isLatestTab, showLatestCapsules]);
+
   // 使用差异更新 Hook 获取帖子列表
-  const listKey = useMemo(() => `home_${getPostType()}`, [getPostType]);
+  const listKey = useMemo(
+    () => `home_${getPostType()}_${currentChannelId || 'all'}`,
+    [getPostType, currentChannelId]
+  );
   
   const {
     posts,
@@ -162,27 +196,34 @@ export const HomeScreen: React.FC = () => {
     if (scrollY + visibleHeight >= contentHeight - 200) {
       loadMore();
     }
-  }, [loadMore]);
+    updateCapsuleVisibilityByScroll(scrollY, gridScrollYRef.current);
+    gridScrollYRef.current = scrollY;
+  }, [loadMore, updateCapsuleVisibilityByScroll]);
 
   // 刷新方法 - 先获取正确类型的帖子，再刷新
   const refresh = useCallback(async () => {
     try {
       // 先获取正确类型的帖子
       await processPostUseCase.fetchPosts(
-        { page: 1, pageSize: DEFAULT_PAGE_SIZE, post_type: getPostType() },
+        {
+          page: 1,
+          pageSize: DEFAULT_PAGE_SIZE,
+          post_type: getPostType(),
+          channelId: currentChannelId,
+        },
         listKey
       );
     } catch (err) {
       console.error('刷新失败:', err);
     }
-  }, [listKey, getPostType]);
+  }, [listKey, getPostType, currentChannelId]);
 
   // Tab 切换时刷新数据并重置列表
   useEffect(() => {
     reset();
     refresh();
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [activeIndex]);
+  }, [activeIndex, currentChannelId]);
 
   // 将获取到的原始帖子与 store 中的状态合并
   // 这样 UI 始终显示的是 store 中的最新状态（包括点赞、收藏等）
@@ -262,6 +303,24 @@ export const HomeScreen: React.FC = () => {
     setActiveIndex(nextIndex);
   }, [activeIndex]);
 
+  useEffect(() => {
+    setShowLatestCapsules(true);
+    listScrollYRef.current = 0;
+    gridScrollYRef.current = 0;
+  }, [activeIndex]);
+
+  useEffect(() => {
+    const loadChannels = async () => {
+      const list = await channelService.list();
+      const capsules: LatestCapsule[] = [
+        { id: '', name: '全部' },
+        ...list.map(item => ({ id: item.id, name: item.name })),
+      ];
+      setLatestCapsules(capsules);
+    };
+    loadChannels();
+  }, []);
+
   const handleSwipeTabChange = useCallback((translationX: number) => {
     setActiveIndex(prev => (
       translationX < 0
@@ -421,6 +480,40 @@ export const HomeScreen: React.FC = () => {
     setShowCreatePost(true);
   };
 
+  const renderLatestCapsules = () => {
+    if (!isLatestTab || !showLatestCapsules) {
+      return null;
+    }
+
+    return (
+      <View style={[styles.capsuleWrapper, { paddingHorizontal: responsivePadding }]}>
+        <ScrollView horizontal showsHorizontalScrollIndicator={false} contentContainerStyle={styles.capsuleList}>
+          {latestCapsules.map((item) => {
+            const isActive = item.id === activeCapsuleId;
+            return (
+              <TouchableOpacity
+                key={item.id || 'all'}
+                activeOpacity={0.85}
+                onPress={() => setActiveCapsuleId(item.id)}
+                style={styles.capsuleItem}
+              >
+                <Text
+                  style={
+                    isActive
+                      ? { ...styles.capsuleText, ...styles.capsuleTextActive }
+                      : styles.capsuleText
+                  }
+                >
+                  {item.name}
+                </Text>
+              </TouchableOpacity>
+            );
+          })}
+        </ScrollView>
+      </View>
+    );
+  };
+
   // 渲染帖子卡片（列表模式）
   const keyExtractor = useCallback((item: Post) => item.id, []);
 
@@ -559,6 +652,7 @@ export const HomeScreen: React.FC = () => {
             />
           }
         >
+          {renderLatestCapsules()}
           <View style={styles.waterfallColumnsRow}>
             {distributePostsToColumns.map((column, index) => renderWaterfallColumn(column, index))}
           </View>
@@ -621,6 +715,7 @@ export const HomeScreen: React.FC = () => {
         data={displayPosts}
         renderItem={renderPostList}
         keyExtractor={keyExtractor}
+        ListHeaderComponent={renderLatestCapsules()}
         contentContainerStyle={[
           styles.listContent,
           {
@@ -640,6 +735,12 @@ export const HomeScreen: React.FC = () => {
         }
         onEndReached={loadMore}
         onEndReachedThreshold={0.3}
+        onScroll={(event) => {
+          const nextY = event.nativeEvent.contentOffset.y;
+          updateCapsuleVisibilityByScroll(nextY, listScrollYRef.current);
+          listScrollYRef.current = nextY;
+        }}
+        scrollEventThrottle={16}
         ListEmptyComponent={renderEmpty}
         ListFooterComponent={isLoadingMore ? <Loading size="sm" /> : null}
         initialNumToRender={8}
@@ -793,6 +894,27 @@ const styles = StyleSheet.create({
     alignItems: 'center',
     justifyContent: 'center',
   },
+  capsuleWrapper: {
+    paddingBottom: spacing.sm,
+    backgroundColor: colors.background.paper,
+  },
+  capsuleList: {
+    gap: spacing.xs,
+    paddingRight: spacing.lg,
+  },
+  capsuleItem: {
+    paddingHorizontal: spacing.md,
+    paddingVertical: spacing.xs,
+    borderRadius: 999,
+  },
+  capsuleText: {
+    fontSize: 13,
+    fontWeight: '600',
+    color: colors.text.secondary,
+  },
+  capsuleTextActive: {
+    color: colors.primary.main,
+  },
   listContent: {
     flexGrow: 1,
   },

src/services/api.ts

@@ -8,6 +8,7 @@
 import AsyncStorage from '@react-native-async-storage/async-storage';
 import { CommonActions } from '@react-navigation/native';
 import Constants from 'expo-constants';
+import { Platform } from 'react-native';
 
 // 生产地址 https://bbs.littlelan.cn
 const getBaseUrl = () => {
@@ -381,12 +382,20 @@ class ApiClient {
   ): Promise<ApiResponse<T>> {
     const formData = new FormData();
     
-    // 添加文件（使用image字段名）
+    // 添加文件（使用 image 字段名）
+    // Web 端需要 append Blob/File；原生端可以直接传 { uri, name, type }。
+    if (Platform.OS === 'web') {
+      const fileResponse = await fetch(file.uri);
+      const blob = await fileResponse.blob();
+      const uploadFile = new File([blob], file.name, { type: file.type || blob.type || 'application/octet-stream' });
+      formData.append('image', uploadFile);
+    } else {
       formData.append('image', {
         uri: file.uri,
         name: file.name,
         type: file.type,
       } as any);
+    }
 
     // 添加额外数据
     if (additionalData) {

src/services/channelService.ts

@@ -0,0 +1,29 @@
+import { api } from './api';
+
+export interface ChannelItem {
+  id: string;
+  name: string;
+  slug: string;
+  description?: string;
+  sort_order: number;
+  is_active: boolean;
+}
+
+interface ChannelListResponse {
+  list: ChannelItem[];
+}
+
+class ChannelService {
+  async list(): Promise<ChannelItem[]> {
+    try {
+      const res = await api.get<ChannelListResponse>('/channels');
+      return res.data?.list || [];
+    } catch (error) {
+      console.error('[channelService] 获取频道失败:', error);
+      return [];
+    }
+  }
+}
+
+export const channelService = new ChannelService();
+

src/services/index.ts

@@ -44,6 +44,8 @@ export { pushService, registerDevice, getDevices, unregisterDevice, updateDevice
 
 // 投票服务
 export { voteService } from './voteService';
+export { channelService } from './channelService';
+export type { ChannelItem } from './channelService';
 
 // SSE 实时服务
 export { sseService } from './sseService';

src/services/postService.ts

@@ -29,6 +29,7 @@ interface CreatePostRequest {
   title: string;
   content: string;
   images?: string[];
+  channel_id?: string;
 }
 
 // 更新帖子请求
@@ -45,7 +46,7 @@ class PostService {
     page = 1,
     pageSize = 20,
     tab?: string,
-    communityId?: string
+    channelId?: string
   ): Promise<PaginatedData<Post>> {
     const params: Record<string, any> = {
       page,
@@ -55,8 +56,8 @@ class PostService {
     if (tab) {
       params.tab = tab;
     }
-    if (communityId) {
+    if (channelId) {
-      params.community_id = communityId;
+      params.channel_id = channelId;
     }
     
     const response = await api.get<PostListResponse>('/posts', params);

src/types/dto.ts

@@ -80,7 +80,7 @@ export interface PostDTO {
   is_liked: boolean;
   is_favorited: boolean;
   // 额外字段
-  community_id?: string;
+  channel_id?: string;
   top_comment?: CommentDTO | null;
 }
 
@@ -780,7 +780,7 @@ export interface VoteResultDTO {
 export interface CreateVotePostRequest {
   title: string;
   content?: string;
-  community_id?: string;
+  channel_id?: string;
   images?: string[];
   vote_options: string[]; // 至少2个，最多10个
 }

src/types/index.ts

@@ -102,6 +102,7 @@ export interface CreatePostInput {
   title: string;
   content: string;
   images?: string[]; // 本地图片路径或 base64
+  channel_id?: string;
 }
 
 // ============================================