feat: 完善文档集管理功能

- 新增文档集保存功能，支持命名和时间戳
   - 实现文档集删除功能
   - 添加文档集列表展示界面
   - 优化文档集 UI 样式和交互

src/panels/helpers/messageRouter.ts

@@ -368,7 +368,12 @@ export async function handleWebviewMessage(
 
     case "saveDocumentSet":
       const { saveDocumentSet } = await import("./contextHelper");
-      saveDocumentSet(message.documents || []);
+      saveDocumentSet(message.documents || [], message.name || "", panel);
+      break;
+
+    case "deleteDocumentSet":
+      const { deleteDocumentSet } = await import("./contextHelper");
+      deleteDocumentSet(message.id, panel);
       break;
 
     case "openContextSettings":