feat: add favorites tab to user profile

backend/src/main/java/com/openisle/controller/UserController.java

@@ -105,6 +105,17 @@ public class UserController {
                 .collect(java.util.stream.Collectors.toList());
     }
 
+    @GetMapping("/{identifier}/subscribed-posts")
+    public java.util.List<PostMetaDto> subscribedPosts(@PathVariable("identifier") String identifier,
+                                                       @RequestParam(value = "limit", required = false) Integer limit) {
+        int l = limit != null ? limit : defaultPostsLimit;
+        User user = userService.findByIdentifier(identifier).orElseThrow();
+        return subscriptionService.getSubscribedPosts(user.getUsername()).stream()
+                .limit(l)
+                .map(userMapper::toMetaDto)
+                .collect(java.util.stream.Collectors.toList());
+    }
+
     @GetMapping("/{identifier}/replies")
     public java.util.List<CommentInfoDto> userReplies(@PathVariable("identifier") String identifier,
                                                       @RequestParam(value = "limit", required = false) Integer limit) {

backend/src/main/java/com/openisle/service/SubscriptionService.java

@@ -107,6 +107,11 @@ public class SubscriptionService {
         return commentSubRepo.findByComment(c).stream().map(CommentSubscription::getUser).toList();
     }
 
+    public List<Post> getSubscribedPosts(String username) {
+        User user = userRepo.findByUsername(username).orElseThrow();
+        return postSubRepo.findByUser(user).stream().map(PostSubscription::getPost).toList();
+    }
+
 
     public long countSubscribers(String username) {
         User user = userRepo.findByUsername(username).orElseThrow();

backend/src/test/java/com/openisle/controller/UserControllerTest.java

@@ -136,6 +136,30 @@ class UserControllerTest {
                 .andExpect(jsonPath("$[0].title").value("hello"));
     }
 
+    @Test
+    void listSubscribedPosts() throws Exception {
+        User user = new User();
+        user.setUsername("bob");
+        com.openisle.model.Category cat = new com.openisle.model.Category();
+        cat.setName("tech");
+        com.openisle.model.Post post = new com.openisle.model.Post();
+        post.setId(6L);
+        post.setTitle("fav");
+        post.setCreatedAt(java.time.LocalDateTime.now());
+        post.setCategory(cat);
+        post.setAuthor(user);
+        Mockito.when(userService.findByIdentifier("bob")).thenReturn(Optional.of(user));
+        Mockito.when(subscriptionService.getSubscribedPosts("bob")).thenReturn(java.util.List.of(post));
+        PostMetaDto meta = new PostMetaDto();
+        meta.setId(6L);
+        meta.setTitle("fav");
+        Mockito.when(userMapper.toMetaDto(post)).thenReturn(meta);
+
+        mockMvc.perform(get("/api/users/bob/subscribed-posts"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$[0].title").value("fav"));
+    }
+
     @Test
     void listUserReplies() throws Exception {
         User user = new User();

frontend_nuxt/pages/users/[id].vue

@@ -94,6 +94,13 @@
           <i class="fas fa-user-plus"></i>
           <div class="profile-tabs-item-label">关注</div>
         </div>
+        <div
+          :class="['profile-tabs-item', { selected: selectedTab === 'favorites' }]"
+          @click="selectedTab = 'favorites'"
+        >
+          <i class="fas fa-bookmark"></i>
+          <div class="profile-tabs-item-label">收藏</div>
+        </div>
         <div
           :class="['profile-tabs-item', { selected: selectedTab === 'achievements' }]"
           @click="selectedTab = 'achievements'"
@@ -318,6 +325,23 @@
           </div>
         </div>
 
+        <div v-else-if="selectedTab === 'favorites'" class="favorites-container">
+          <div v-if="favoritePosts.length > 0">
+            <BaseTimeline :items="favoritePosts">
+              <template #item="{ item }">
+                <NuxtLink :to="`/posts/${item.post.id}`" class="timeline-link">
+                  {{ item.post.title }}
+                </NuxtLink>
+                <div class="timeline-snippet">
+                  {{ stripMarkdown(item.post.snippet) }}
+                </div>
+                <div class="timeline-date">{{ formatDate(item.post.createdAt) }}</div>
+              </template>
+            </BaseTimeline>
+          </div>
+          <div v-else class="summary-empty">暂无收藏文章</div>
+        </div>
+
         <div v-else-if="selectedTab === 'achievements'" class="achievements-container">
           <AchievementList :medals="medals" :can-select="isMine" />
         </div>
@@ -352,6 +376,7 @@ const user = ref({})
 const hotPosts = ref([])
 const hotReplies = ref([])
 const hotTags = ref([])
+const favoritePosts = ref([])
 const timelineItems = ref([])
 const timelineFilter = ref('all')
 const filteredTimelineItems = computed(() => {
@@ -369,7 +394,7 @@ const subscribed = ref(false)
 const isLoading = ref(true)
 const tabLoading = ref(false)
 const selectedTab = ref(
-  ['summary', 'timeline', 'following', 'achievements'].includes(route.query.tab)
+  ['summary', 'timeline', 'following', 'favorites', 'achievements'].includes(route.query.tab)
     ? route.query.tab
     : 'summary',
 )
@@ -472,6 +497,16 @@ const fetchFollowUsers = async () => {
   followings.value = followingRes.ok ? await followingRes.json() : []
 }
 
+const fetchFavorites = async () => {
+  const res = await fetch(`${API_BASE_URL}/api/users/${username}/subscribed-posts`)
+  if (res.ok) {
+    const data = await res.json()
+    favoritePosts.value = data.map((p) => ({ icon: 'fas fa-bookmark', post: p }))
+  } else {
+    favoritePosts.value = []
+  }
+}
+
 const loadSummary = async () => {
   tabLoading.value = true
   await fetchSummary()
@@ -490,6 +525,12 @@ const loadFollow = async () => {
   tabLoading.value = false
 }
 
+const loadFavorites = async () => {
+  tabLoading.value = true
+  await fetchFavorites()
+  tabLoading.value = false
+}
+
 const fetchAchievements = async () => {
   const res = await fetch(`${API_BASE_URL}/api/medals?userId=${user.value.id}`)
   if (res.ok) {
@@ -578,6 +619,8 @@ const init = async () => {
       await loadTimeline()
     } else if (selectedTab.value === 'following') {
       await loadFollow()
+    } else if (selectedTab.value === 'favorites') {
+      await loadFavorites()
     } else if (selectedTab.value === 'achievements') {
       await loadAchievements()
     }
@@ -596,6 +639,8 @@ watch(selectedTab, async (val) => {
     await loadTimeline()
   } else if (val === 'following' && followers.value.length === 0 && followings.value.length === 0) {
     await loadFollow()
+  } else if (val === 'favorites' && favoritePosts.value.length === 0) {
+    await loadFavorites()
   } else if (val === 'achievements' && medals.value.length === 0) {
     await loadAchievements()
   }