diff --git a/admin-routes.mjs b/admin-routes.mjs
index f40a2f4..e55da58 100644
--- a/admin-routes.mjs
+++ b/admin-routes.mjs
@@ -576,6 +576,14 @@ export function createOpsApi({ jsonBody, plazaOps }) {
   opsApi.use(jsonBody);
   opsApi.use(makeRequireOps('reviewer'));
 
+  opsApi.get('/categories', async (req, res) => {
+    try {
+      return sendData(res, req, { categories: await plazaOps.listCategories() });
+    } catch (error) {
+      return plazaRouteError(res, req, error);
+    }
+  });
+
   opsApi.get('/review/queue', async (req, res) => {
     try {
       const queue = await plazaOps.listReviewQueue({
@@ -583,6 +591,7 @@ export function createOpsApi({ jsonBody, plazaOps }) {
         cursor: req.query.cursor ?? null,
         limit: req.query.limit,
         keyword: req.query.keyword ?? null,
+        category: req.query.category ?? null,
       });
       return sendData(res, req, queue);
     } catch (error) {
diff --git a/plaza-api.mjs b/plaza-api.mjs
index 1933c10..0c8f3b1 100644
--- a/plaza-api.mjs
+++ b/plaza-api.mjs
@@ -434,6 +434,14 @@ export function attachPlazaApiRoutes(api, plaza, { sendData, sendError }) {
   opsApi.use(express.json({ limit: '1mb' }));
   opsApi.use(makeRequireOps('reviewer'));
 
+  opsApi.get('/categories', async (req, res) => {
+    try {
+      return sendData(res, req, { categories: await ops.listCategories() });
+    } catch (error) {
+      return routeError(res, req, error);
+    }
+  });
+
   opsApi.get('/review/queue', async (req, res) => {
     try {
       const queue = await ops.listReviewQueue({
@@ -441,6 +449,7 @@ export function attachPlazaApiRoutes(api, plaza, { sendData, sendError }) {
         cursor: req.query.cursor ?? null,
         limit: req.query.limit,
         keyword: req.query.keyword ?? null,
+        category: req.query.category ?? null,
       });
       return sendData(res, req, queue);
     } catch (error) {
diff --git a/plaza-ops.mjs b/plaza-ops.mjs
index c5fc28f..d6829b1 100644
--- a/plaza-ops.mjs
+++ b/plaza-ops.mjs
@@ -46,11 +46,27 @@ export function createPlazaOpsService(
     );
   };
 
+  const listCategories = async () => {
+    const [rows] = await pool.query(
+      `SELECT id, name, slug, icon
+       FROM plaza_categories
+       WHERE is_active = 1
+       ORDER BY sort_order ASC, name ASC`,
+    );
+    return rows.map((row) => ({
+      id: row.id,
+      name: row.name,
+      slug: row.slug,
+      icon: row.icon ?? '',
+    }));
+  };
+
   const listReviewQueue = async ({
     status = 'pending_review',
     cursor = null,
     limit = 20,
     keyword = null,
+    category = null,
   } = {}) => {
     const pageLimit = clampLimit(limit, 20, 100);
     const params = [status];
@@ -65,13 +81,19 @@ export function createPlazaOpsService(
       const pattern = `%${String(keyword).trim()}%`;
       params.push(pattern, pattern, pattern);
     }
+    let categoryClause = '';
+    const categorySlug = String(category ?? '').trim();
+    if (categorySlug) {
+      categoryClause = 'AND c.slug = ?';
+      params.push(categorySlug);
+    }
     params.push(pageLimit + 1);
     const [rows] = await pool.query(
       `SELECT pp.id, pp.title, pp.summary, pp.cover_url, pp.status, pp.user_display_name, pp.user_slug,
               pp.published_at, pp.created_at, c.name AS category_name, c.slug AS category_slug, c.icon AS category_icon
        FROM plaza_posts pp
        JOIN plaza_categories c ON c.id = pp.category_id
-       WHERE pp.status = ? ${cursorClause} ${keywordClause}
+       WHERE pp.status = ? ${cursorClause} ${keywordClause} ${categoryClause}
        ORDER BY pp.published_at DESC, pp.id DESC
        LIMIT ?`,
       params,
@@ -419,6 +441,7 @@ export function createPlazaOpsService(
   return {
     loadOperatorRole,
     hasOpsRole,
+    listCategories,
     listReviewQueue,
     reviewPostAsOps,
     batchReviewPosts,
diff --git a/plaza-posts.mjs b/plaza-posts.mjs
index 049a087..9e5b47c 100644
--- a/plaza-posts.mjs
+++ b/plaza-posts.mjs
@@ -251,7 +251,69 @@ export function createPlazaPostService(
     };
   };
 
-  const createPost = async (userId, input) => {
+  const findPostByPublicationId = async (publicationId, { userId = null } = {}) => {
+    const params = [publicationId];
+    let userClause = '';
+    if (userId) {
+      userClause = ' AND pp.user_id = ?';
+      params.push(userId);
+    }
+    const [rows] = await pool.query(
+      `SELECT pp.id, pp.status
+       FROM plaza_posts pp
+       WHERE pp.publication_id = ?${userClause} AND pp.status != 'hidden'
+       LIMIT 1`,
+      params,
+    );
+    return rows[0] ?? null;
+  };
+
+  const republishExistingPost = async (userId, postId, options = {}) => {
+    const now = Date.now();
+    const status = autoApprove || options.forcePublished ? 'published' : 'pending_review';
+    const hotScore = status === 'published' ? await resolveHotScore(now) : 0;
+    const [result] = await pool.query(
+      `UPDATE plaza_posts
+       SET status = ?, hot_score = ?, hot_updated_at = ?, updated_at = ?, published_at = ?
+       WHERE id = ? AND user_id = ? AND status IN ('hidden', 'rejected')`,
+      [status, hotScore, status === 'published' ? now : null, now, now, postId, userId],
+    );
+    if (result.affectedRows === 0) {
+      throw plazaError('帖子不存在或无法重新发布', 'POST_NOT_FOUND');
+    }
+    if (status === 'published') {
+      await plazaRedis?.invalidateFeedCaches?.();
+      if (options.deferPostPublishedHooks) {
+        void onPostPublished?.(postId);
+      } else {
+        await onPostPublished?.(postId);
+      }
+    }
+    return { id: postId, status };
+  };
+
+  const publishPostForPublication = async (userId, input, options = {}) => {
+    const publicationId = String(input?.publication_id ?? '').trim();
+    if (!publicationId) throw plazaError('publication_id 不能为空', 'invalid_input');
+
+    const [existingRows] = await pool.query(
+      `SELECT id, status FROM plaza_posts WHERE publication_id = ? AND user_id = ? LIMIT 1`,
+      [publicationId, userId],
+    );
+    const existing = existingRows[0];
+    if (existing) {
+      if (existing.status === 'published' || existing.status === 'pending_review') {
+        throw plazaError('该内容已发布到广场', 'ALREADY_PUBLISHED', { post_id: existing.id });
+      }
+      if (existing.status === 'hidden' || existing.status === 'rejected') {
+        return republishExistingPost(userId, existing.id, options);
+      }
+    }
+
+    return createPost(userId, input, options);
+  };
+
+  const createPost = async (userId, input, options = {}) => {
     const publicationId = String(input?.publication_id ?? '').trim();
     if (!publicationId) throw plazaError('publication_id 不能为空', 'invalid_input');
 
@@ -269,7 +331,7 @@ export function createPlazaPostService(
     const allowComment = input?.allow_comment == null ? true : Boolean(input.allow_comment);
     const now = Date.now();
     const postId = idFactory();
-    const status = autoApprove ? 'published' : 'pending_review';
+    const status = autoApprove || options.forcePublished ? 'published' : 'pending_review';
     const hotScore = status === 'published' ? await resolveHotScore(now) : 0;
 
     const conn = await pool.getConnection();
@@ -317,7 +379,11 @@ export function createPlazaPostService(
 
     if (status === 'published') {
       await plazaRedis?.invalidateFeedCaches?.();
-      await onPostPublished?.(postId);
+      if (options.deferPostPublishedHooks) {
+        void onPostPublished?.(postId);
+      } else {
+        await onPostPublished?.(postId);
+      }
     }
 
     return { id: postId, status };
@@ -591,6 +657,7 @@ export function createPlazaPostService(
         `UPDATE plaza_posts SET status = 'hidden', updated_at = ? WHERE id = ?`,
         [now, postId],
       );
+      await plazaRedis?.invalidateFeedCaches?.();
       return { id: postId, status: 'hidden' };
     }
     throw plazaError('不支持的审核操作', 'invalid_input');
@@ -619,6 +686,8 @@ export function createPlazaPostService(
     ensureCategories,
     listCategories,
     createPost,
+    publishPostForPublication,
+    findPostByPublicationId,
     updatePost,
     hidePost,
     hidePostsByPublicationId,