feat(post): add post reference functionality with inline cards and suggestion search

Add support for referencing/quoting other posts within post content. Includes:
- New `post_ref` segment type with `PostRefSegmentData` interface for post references
- New `PostRefCard` component to display referenced posts inline
- Post suggestion search triggered by `#` in `PostMentionInput`
- Updated `PostContentRenderer` to render post reference segments
- Add `suggestPosts` and `recordRefClick` API methods in postService

Additional improvements:
- Add image gallery preview for user profile covers and avatars
- Make text selectable across CommentItem, PostContentRenderer, and PostDetailScreen
- Migrate FlatList to FlashList in PostDetailScreen and UserProfileScreen
- Add nestedScrollEnabled to CreatePostScreen
- Add clickable member avatars in GroupMembersScreen

src/screens/message/GroupMembersScreen.tsx

@@ -21,6 +21,7 @@ import {
 } from 'react-native';
 import { SafeAreaView } from 'react-native-safe-area-context';
 import { useLocalSearchParams, useRouter } from 'expo-router';
+import { hrefUserProfile } from '../../navigation/hrefs';
 import { MaterialCommunityIcons } from '@expo/vector-icons';
 import { blurActiveElement } from '../../infrastructure/platform';
 import { spacing, fontSizes, borderRadius, useAppColors, type AppColors } from '../../theme';
@@ -383,24 +384,36 @@ const GroupMembersScreen: React.FC = () => {
     }
   };
 
+  // 点击头像进入对方主页
+  const handleAvatarPress = (member: GroupMemberResponse) => {
+    if (member.user_id) {
+      router.push(hrefUserProfile(String(member.user_id)));
+    }
+  };
+
   // 渲染成员项
   const renderMember: ListRenderItem<GroupMemberResponse> = ({ item }) => {
     const isSelf = item.user_id === currentUser?.id;
     const canManage = isAdmin && item.role !== 'owner' && (isOwner || item.role === 'member');
 
     return (
-      <TouchableOpacity
-        style={styles.memberItem}
-        onPress={() => canManage ? openActionModal(item) : null}
-        onLongPress={() => isSelf ? openNicknameModal(item) : null}
-        activeOpacity={canManage ? 0.7 : 1}
-      >
-        <Avatar
-          source={item.user?.avatar}
-          size={48}
-          name={item.user?.nickname || item.nickname}
-        />
-        <View style={styles.memberInfo}>
+      <View style={styles.memberItem}>
+        <TouchableOpacity
+          onPress={() => handleAvatarPress(item)}
+          activeOpacity={0.7}
+        >
+          <Avatar
+            source={item.user?.avatar}
+            size={48}
+            name={item.user?.nickname || item.nickname}
+          />
+        </TouchableOpacity>
+        <TouchableOpacity
+          style={styles.memberInfo}
+          onPress={() => isSelf ? openNicknameModal(item) : handleAvatarPress(item)}
+          onLongPress={() => isSelf ? openNicknameModal(item) : null}
+          activeOpacity={0.7}
+        >
           <View style={styles.memberNameRow}>
             <Text variant="body" style={styles.memberName}>
               {item.nickname || item.user?.nickname || '未知用户'}
@@ -422,11 +435,16 @@ const GroupMembersScreen: React.FC = () => {
               <Text variant="label" color={colors.error.main}> 禁言中</Text>
             </View>
           )}
-        </View>
+        </TouchableOpacity>
         {canManage && (
-          <MaterialCommunityIcons name="dots-vertical" size={20} color={colors.text.hint} />
+          <TouchableOpacity
+            onPress={() => openActionModal(item)}
+            hitSlop={{ top: 8, bottom: 8, left: 8, right: 8 }}
+          >
+            <MaterialCommunityIcons name="dots-vertical" size={20} color={colors.text.hint} />
+          </TouchableOpacity>
         )}
-      </TouchableOpacity>
+      </View>
     );
   };