Merge branch 'master' of http://192.168.0.200/knowledge-base-bj/deerflow-server into dhk-1

解决 artifact 预览组件冲突：mermaid 渲染(dhk-1) 与 markdown 锚点跳转(master) 取并集；package-lock.json 按 master 删除(项目用 pnpm)。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend-web/package.json

@@ -56,6 +56,7 @@
     "@uiw/react-codemirror": "^4.25.4",
     "@xyflow/react": "^12.10.0",
     "ai": "^6.0.33",
+    "axios": "1.16.1",
     "best-effort-json-parser": "^1.2.1",
     "canvas-confetti": "^1.9.4",
     "class-variance-authority": "^0.7.1",