feat(moderation): 帖评删除占位感知与硬删清场

管理删帖须填类型与理由并展示专用页；评论软删占位、版主可硬删不占楼。

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

frontend/app/admin/content/ContentAdmin.tsx

@@ -34,6 +34,7 @@ import { formatRelative } from "@/lib/format";
 import { toast } from "@/lib/toast";
 import Avatar from "@/components/Avatar";
 import ConfirmDialog from "@/components/ConfirmDialog";
+import StaffDeletePostModal from "@/components/StaffDeletePostModal";
 
 const PAGE_SIZE = 15;
 
@@ -139,6 +140,8 @@ export default function ContentAdmin({
     run: () => Promise<void>;
   } | null>(null);
   const [confirmBusy, setConfirmBusy] = useState(false);
+  const [staffDeletePost, setStaffDeletePost] = useState<AdminContentPost | null>(null);
+  const [staffDeleteBusy, setStaffDeleteBusy] = useState(false);
 
   const refreshCounts = useCallback(() => {
     apiAdminContentCounts().then(setCounts).catch(() => {});
@@ -515,18 +518,7 @@ export default function ContentAdmin({
                       type="button"
                       className="btn btn-line btn-sm"
                       disabled={busy}
-                      onClick={() =>
-                        askConfirm(
-                          "移入回收站",
-                          `确定软删帖子「${p.title}」吗？可稍后在「已删除」中恢复。`,
-                          () =>
-                            apiAdminSoftDeletePost(p.id).then(() => {
-                              toast("已移入回收站", "ok");
-                              reload(postsPage);
-                            }),
-                          true
-                        )
-                      }
+                      onClick={() => setStaffDeletePost(p)}
                     >
                       <Trash2 size={14} /> 删除
                     </button>
@@ -691,6 +683,25 @@ export default function ContentAdmin({
             });
         }}
       />
+
+      <StaffDeletePostModal
+        open={!!staffDeletePost}
+        title={staffDeletePost?.title}
+        busy={staffDeleteBusy}
+        onClose={() => !staffDeleteBusy && setStaffDeletePost(null)}
+        onConfirm={(opts) => {
+          if (!staffDeletePost) return;
+          setStaffDeleteBusy(true);
+          apiAdminSoftDeletePost(staffDeletePost.id, opts)
+            .then(() => {
+              toast("已移入回收站", "ok");
+              setStaffDeletePost(null);
+              reload(postsPage);
+            })
+            .catch((e) => toast(e instanceof Error ? e.message : "操作失败"))
+            .finally(() => setStaffDeleteBusy(false));
+        }}
+      />
     </div>
   );
 }