feat(app): 移除内置agents并添加CORS支持和技能上传优化

移除了agents/registry.json中的所有内置agents配置，将agents数组清空。
为web应用添加了CORS中间件支持，允许指定的前端地址跨域访问。
重构了技能上传功能，增加了LLM重写机制，自动规范化上传的技能格式。
新增了工具名称提取逻辑，从技能正文中自动识别Required Tools段落。
更新了技能学习候选者和草稿的载荷结构，添加评估报告统计信息。
修改了意图路由技能的说明，改进任务状态管理逻辑。

app-instance/frontend/app/(app)/files/page.tsx

@@ -28,8 +28,10 @@ import {
   deleteUserFile,
   createUserFileDir,
   getAccessToken,
+  isApiError,
 } from '@/lib/api';
 import type { UserFileContent, UserFileItem } from '@/lib/api';
+import { canMutateUserFilesPath } from '@/lib/user-file-paths';
 import { Button } from '@/components/ui/button';
 import { ScrollArea } from '@/components/ui/scroll-area';
 import { type AppLocale, pickAppText } from '@/lib/i18n/core';
@@ -44,6 +46,10 @@ function sleep(ms: number): Promise<void> {
   });
 }
 
+function isAuthError(error: unknown): boolean {
+  return isApiError(error, 401);
+}
+
 export default function FilesPage() {
   const { locale } = useAppI18n();
   const [items, setItems] = useState<UserFileItem[]>([]);
@@ -78,6 +84,9 @@ export default function FilesPage() {
           return;
         } catch (err) {
           lastError = err;
+          if (isAuthError(err)) {
+            break;
+          }
         }
       }
       const message = lastError instanceof Error ? lastError.message : pickAppText(locale, '加载文件失败', 'Failed to load files');
@@ -156,6 +165,15 @@ export default function FilesPage() {
   const handleUpload = async (e: React.ChangeEvent<HTMLInputElement>) => {
     const files = e.target.files;
     if (!files || files.length === 0) return;
+    if (!canMutateUserFilesPath(currentPath)) {
+      setLoadError(pickAppText(
+        locale,
+        '请先进入 uploads、outputs、shared 或 tasks 目录后再上传。',
+        'Open uploads, outputs, shared, or tasks before uploading.'
+      ));
+      if (fileInputRef.current) fileInputRef.current.value = '';
+      return;
+    }
 
     setUploading(true);
     setUploadProgress(0);
@@ -178,6 +196,14 @@ export default function FilesPage() {
   const handleCreateDir = async () => {
     const name = newDirName.trim();
     if (!name) return;
+    if (!canMutateUserFilesPath(currentPath)) {
+      setLoadError(pickAppText(
+        locale,
+        '请先进入 uploads、outputs、shared 或 tasks 目录后再新建文件夹。',
+        'Open uploads, outputs, shared, or tasks before creating a folder.'
+      ));
+      return;
+    }
     try {
       const dirPath = currentPath ? `${currentPath}/${name}` : name;
       await createUserFileDir(dirPath);
@@ -191,6 +217,7 @@ export default function FilesPage() {
 
   // Build breadcrumbs
   const breadcrumbs = currentPath ? currentPath.split('/') : [];
+  const canMutateCurrentPath = canMutateUserFilesPath(currentPath);
 
   const formatSize = (bytes: number | null) => {
     if (bytes === null || bytes === undefined) return '';
@@ -224,7 +251,12 @@ export default function FilesPage() {
             size="sm"
             className="h-11"
             onClick={() => setShowMkdir(true)}
-            disabled={loading}
+            disabled={loading || !canMutateCurrentPath}
+            title={
+              canMutateCurrentPath
+                ? undefined
+                : pickAppText(locale, '先进入 uploads、outputs、shared 或 tasks', 'Open uploads, outputs, shared, or tasks first')
+            }
           >
             <FolderPlus className="w-4 h-4 mr-1" />
             {pickAppText(locale, '新建文件夹', 'New folder')}
@@ -234,7 +266,12 @@ export default function FilesPage() {
             size="sm"
             className="h-11"
             onClick={() => fileInputRef.current?.click()}
-            disabled={uploading}
+            disabled={uploading || !canMutateCurrentPath}
+            title={
+              canMutateCurrentPath
+                ? undefined
+                : pickAppText(locale, '先进入 uploads、outputs、shared 或 tasks', 'Open uploads, outputs, shared, or tasks first')
+            }
           >
             {uploading ? (
               <>
@@ -272,6 +309,15 @@ export default function FilesPage() {
           </Button>
         </div>
       </div>
+      {!canMutateCurrentPath && !loading && (
+        <p className="mb-4 rounded-md border border-[#E6E1DE] bg-muted/40 px-3 py-2 text-sm text-muted-foreground">
+          {pickAppText(
+            locale,
+            '请选择 uploads、outputs、shared 或 tasks 后再上传或新建文件夹。',
+            'Select uploads, outputs, shared, or tasks before uploading or creating folders.'
+          )}
+        </p>
+      )}
 
       {/* Breadcrumbs */}
       <div className="flex items-center gap-1 mb-4 text-sm text-muted-foreground flex-wrap">