feat(plaza-ops): add post management API for admin console

Expose categories listing, category filter on review queue, and invalidate
feed caches when ops hides a published post.

Co-authored-by: Cursor <cursoragent@cursor.com>

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,