feat(ops): add plaza post management page

List published and hidden posts with category filters, pagination, and
inline hide/restore actions for the operations console.

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

src/ops/ops.css

@@ -708,3 +708,61 @@ input[type='checkbox'] {
     align-items: stretch;
   }
 }
+
+.ops-filter-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 10px;
+  align-items: flex-start;
+}
+
+.ops-filter-label {
+  flex: 0 0 auto;
+  padding-top: 8px;
+  font-size: 13px;
+  color: var(--ops-muted);
+}
+
+.ops-chip-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+  flex: 1;
+}
+
+.ops-chip {
+  border: 1px solid rgba(255, 255, 255, 0.08);
+  background: rgba(255, 255, 255, 0.03);
+  color: var(--ops-text);
+  border-radius: 999px;
+  padding: 6px 12px;
+  font-size: 13px;
+  cursor: pointer;
+}
+
+.ops-chip.active {
+  border-color: rgba(120, 170, 255, 0.45);
+  background: rgba(120, 170, 255, 0.14);
+}
+
+.ops-title-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px;
+}
+
+.ops-inline-action {
+  padding: 4px 10px;
+  font-size: 12px;
+}
+
+.ops-pagination {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 12px;
+  align-items: center;
+  justify-content: flex-end;
+  padding: 16px;
+  border-top: 1px solid rgba(255, 255, 255, 0.06);
+}