feat(annotation): 添加标注编辑器侧边栏折叠功能

- 引入 MenuFoldOutlined 和 MenuUnfoldOutlined 图标用于侧边栏控制
- 添加 sidebarCollapsed 状态管理侧边栏展开/收起状态
- 扩展 Label Studio 界面配置，启用完整的标注界面组件
- 实现可折叠的左侧文件列表，支持展开/收起操作
- 优化顶部工具栏布局，调整标题层级和按钮标签
- 改进文件列表样式，添加悬停效果和更清晰的状态标识
- 调整整体布局结构，提升编辑器区域的空间利用率

frontend/src/pages/DataAnnotation/Annotate/LabelStudioTextEditor.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useMemo, useRef, useState } from "react";
 import { App, Button, Card, List, Spin, Typography } from "antd";
-import { LeftOutlined, ReloadOutlined, SaveOutlined } from "@ant-design/icons";
+import { LeftOutlined, ReloadOutlined, SaveOutlined, MenuFoldOutlined, MenuUnfoldOutlined } from "@ant-design/icons";
 import { useNavigate, useParams } from "react-router";
 
 import {
@@ -54,6 +54,7 @@ export default function LabelStudioTextEditor() {
   const [project, setProject] = useState<EditorProjectInfo | null>(null);
   const [tasks, setTasks] = useState<EditorTaskListItem[]>([]);
   const [selectedFileId, setSelectedFileId] = useState<string>("");
+  const [sidebarCollapsed, setSidebarCollapsed] = useState(false);
 
   const postToIframe = (type: string, payload?: any) => {
     const win = iframeRef.current?.contentWindow;
@@ -128,15 +129,29 @@ export default function LabelStudioTextEditor() {
         labelConfig: project.labelConfig,
         task,
         user: { id: "datamate" },
+        // 完整的 Label Studio 原生界面配置
         interfaces: [
-          "panel",
-          "update",
-          "controls",
+          // 核心面板
+          "panel",              // 导航面板（undo/redo/reset）
+          "update",             // 更新按钮
+          "submit",             // 提交按钮
+          "controls",           // 控制面板
+          // 侧边栏（包含 Outliner 和 Details）
           "side-column",
+          // 标注管理
           "annotations:tabs",
           "annotations:menu",
           "annotations:current",
+          "annotations:add-new",
+          "annotations:delete",
+          "annotations:view-all",
           "annotations:history",
+          // 预测
+          "predictions:tabs",
+          "predictions:menu",
+          // 其他
+          "auto-annotation",
+          "edit-history",
         ],
         selectedAnnotationIndex: 0,
         allowCreateEmptyAnnotation: true,
@@ -282,19 +297,25 @@ export default function LabelStudioTextEditor() {
   }
 
   return (
-    <div className="h-full flex flex-col gap-3">
-      <div className="flex items-center justify-between">
+    <div className="h-full flex flex-col">
+      {/* 顶部工具栏 */}
+      <div className="flex items-center justify-between px-3 py-2 border-b border-gray-200 bg-white">
         <div className="flex items-center gap-2">
           <Button icon={<LeftOutlined />} onClick={() => navigate("/data/annotation")}>
             返回
           </Button>
-          <Typography.Title level={4} style={{ margin: 0 }}>
-            标注
+          <Button
+            icon={sidebarCollapsed ? <MenuUnfoldOutlined /> : <MenuFoldOutlined />}
+            onClick={() => setSidebarCollapsed(!sidebarCollapsed)}
+            title={sidebarCollapsed ? "展开文件列表" : "收起文件列表"}
+          />
+          <Typography.Title level={5} style={{ margin: 0 }}>
+            标注编辑器
           </Typography.Title>
         </div>
         <div className="flex items-center gap-2">
           <Button icon={<ReloadOutlined />} loading={loadingTasks} onClick={() => loadTasks()}>
-            刷新文件列表
+            刷新
           </Button>
           <Button
             type="primary"
@@ -308,68 +329,78 @@ export default function LabelStudioTextEditor() {
         </div>
       </div>
 
-      <div className="flex items-stretch gap-3 flex-1 min-h-0">
-        <Card
-          title="文件"
-          className="h-full flex flex-col"
-          style={{ width: 320 }}
-          bodyStyle={{ padding: 0, flex: 1, overflow: "auto" }}
+      {/* 主体区域 */}
+      <div className="flex flex-1 min-h-0">
+        {/* 左侧文件列表 - 可折叠 */}
+        <div
+          className="border-r border-gray-200 bg-gray-50 flex flex-col transition-all duration-200"
+          style={{ width: sidebarCollapsed ? 0 : 240, overflow: "hidden" }}
         >
-          <List
-            loading={loadingTasks}
-            dataSource={tasks}
-            renderItem={(item) => (
-              <List.Item
-                key={item.fileId}
-                style={{
-                  cursor: "pointer",
-                  background: item.fileId === selectedFileId ? "#f0f5ff" : undefined,
-                  paddingLeft: 12,
-                  paddingRight: 12,
-                }}
-                onClick={() => setSelectedFileId(item.fileId)}
-              >
-                <div className="flex flex-col w-full">
-                  <div className="flex items-center justify-between gap-2">
-                    <Typography.Text ellipsis>{item.fileName}</Typography.Text>
-                    <Typography.Text type="secondary" style={{ whiteSpace: "nowrap" }}>
-                      {item.hasAnnotation ? "已标注" : "未标注"}
+          <div className="px-3 py-2 border-b border-gray-200 bg-white font-medium text-sm">
+            文件列表
+          </div>
+          <div className="flex-1 overflow-auto">
+            <List
+              loading={loadingTasks}
+              size="small"
+              dataSource={tasks}
+              renderItem={(item) => (
+                <List.Item
+                  key={item.fileId}
+                  className="cursor-pointer hover:bg-blue-50"
+                  style={{
+                    background: item.fileId === selectedFileId ? "#e6f4ff" : undefined,
+                    padding: "8px 12px",
+                    borderBottom: "1px solid #f0f0f0",
+                  }}
+                  onClick={() => setSelectedFileId(item.fileId)}
+                >
+                  <div className="flex flex-col w-full gap-1">
+                    <Typography.Text ellipsis style={{ fontSize: 13 }}>
+                      {item.fileName}
                     </Typography.Text>
+                    <div className="flex items-center justify-between">
+                      <Typography.Text
+                        type={item.hasAnnotation ? "success" : "secondary"}
+                        style={{ fontSize: 11 }}
+                      >
+                        {item.hasAnnotation ? "已标注" : "未标注"}
+                      </Typography.Text>
+                      {item.annotationUpdatedAt && (
+                        <Typography.Text type="secondary" style={{ fontSize: 10 }}>
+                          {item.annotationUpdatedAt}
+                        </Typography.Text>
+                      )}
+                    </div>
                   </div>
-                  {item.annotationUpdatedAt && (
-                    <Typography.Text type="secondary" style={{ fontSize: 12 }}>
-                      更新: {item.annotationUpdatedAt}
-                    </Typography.Text>
-                  )}
-                </div>
-              </List.Item>
-            )}
-          />
-        </Card>
-
-        <Card title="编辑器" className="flex-1 h-full flex flex-col" bodyStyle={{ padding: 0, flex: 1, overflow: "hidden" }}>
-          <div className="relative h-full">
-            {(!iframeReady || loadingTaskDetail || (selectedFileId && !lsReady)) && (
-              <div className="absolute inset-0 z-10 flex items-center justify-center bg-white/70">
-                <Spin
-                  tip={
-                    !iframeReady
-                      ? "编辑器资源加载中..."
-                      : loadingTaskDetail
-                        ? "任务数据加载中..."
-                        : "编辑器初始化中..."
-                  }
-                />
-              </div>
-            )}
-            <iframe
-              ref={iframeRef}
-              title="Label Studio Frontend"
-              src={LSF_IFRAME_SRC}
-              className="w-full h-full border-0"
+                </List.Item>
+              )}
             />
           </div>
-        </Card>
+        </div>
+
+        {/* 右侧编辑器 - Label Studio iframe */}
+        <div className="flex-1 relative">
+          {(!iframeReady || loadingTaskDetail || (selectedFileId && !lsReady)) && (
+            <div className="absolute inset-0 z-10 flex items-center justify-center bg-white/80">
+              <Spin
+                tip={
+                  !iframeReady
+                    ? "编辑器资源加载中..."
+                    : loadingTaskDetail
+                      ? "任务数据加载中..."
+                      : "编辑器初始化中..."
+                }
+              />
+            </div>
+          )}
+          <iframe
+            ref={iframeRef}
+            title="Label Studio Frontend"
+            src={LSF_IFRAME_SRC}
+            className="w-full h-full border-0"
+          />
+        </div>
       </div>
     </div>
   );