feat：完成Collabora初步集成（返回顶部、文档页数获取）

app/components/collabora/CollaboraViewer.tsx

@@ -51,6 +51,7 @@ export const CollaboraViewer = forwardRef<CollaboraViewerHandle, CollaboraViewer
       unoCommands,
       isReady: isDocumentLoaded,
       mode,
+      getIframeWindow: () => iframeRef.current?.contentWindow || null,
     }), [unoCommands, isDocumentLoaded, mode]);
 
     // 5. 将 sendUnoCommand 挂载到 window 对象，供调试面板和控制台使用
@@ -121,24 +122,12 @@ export const CollaboraViewer = forwardRef<CollaboraViewerHandle, CollaboraViewer
         }
       }
     }
-
-    try {
-      // 先让 iframe 获得焦点
-      iframeRef.current.focus();
-      console.log('[调试面板] 已聚焦 iframe');
-
-      (window as any).sendUno?.(unoCmd, args);
-      setUnoResult(`已发送: ${unoCmd}`);
-    } catch (e) {
-      console.error('发送 UNO 失败:', e);
-      setUnoResult('发送失败，请查看控制台');
-    }
   };
 
   return (
     <div className="collabora-viewer relative w-full h-full min-h-[600px]">
       {/* UNO 命令测试面板 */}
-      <div className="absolute top-2 left-2 z-50 bg-white bg-opacity-90 px-2 py-1 rounded shadow flex items-center gap-2">
+      {/* <div className="absolute top-2 left-2 z-50 bg-white bg-opacity-90 px-2 py-1 rounded shadow flex items-center gap-2">
         <input
           className="px-2 py-1 border rounded text-sm w-48"
           value={unoCmd}
@@ -160,7 +149,7 @@ export const CollaboraViewer = forwardRef<CollaboraViewerHandle, CollaboraViewer
           发送 UNO
         </button>
         {unoResult && <span className="text-xs text-gray-500 ml-2">{unoResult}</span>}
-      </div>
+      </div> */}
 
       {/* 文档加载提示 */}
       {!isDocumentLoaded && (