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。

skills/officebench-mcp/versions/v0001/version.json

@@ -1,6 +1,6 @@
 {
   "change_reason": "Initial OfficeBench MCP skill for evaluation runs",
-  "content_hash": "6afdd5a93ce552f39c1e285fc552059cfada7971e0d5bb91bcd56c6ca608ba17",
+  "content_hash": "54547e8b2b5de5700d57c464a19e941a2cddd6c42af69c91122f8bd4b9c6726c",
   "created_at": "2026-05-27T00:00:00.000000+00:00",
   "created_by": "codex",
   "frontmatter": {
@@ -44,8 +44,8 @@
   },
   "review_state": "published",
   "skill_name": "officebench-mcp",
-  "summary": "OfficeBench MCP skill for using registered mcp_officebench_* tools correctly during evaluation runs.",
-  "summary_hash": "914d6759650fce29884f648b84929e0482475c3ccd6601e9903c9b8b826dd874",
+  "summary": "# Officebench Mcp ## Overview Guidance for OfficeBench evaluation tasks. Use the registered mcp_officebench_* tools to inspect and edit OfficeBench files, spreadsheets, documents, emails, calendars, PDFs, and answer files.",
+  "summary_hash": "c8702c29954060ae65ca49e5c1a0fbfcd68c40e0522c64d75c7bb3f8c705ee66",
   "tool_hints": [
     "mcp_officebench_excel_read_file",
     "mcp_officebench_excel_set_cell",
@@ -77,4 +77,3 @@
   ],
   "version": "v0001"
 }
-