fix: update axios to ^1.15.2 and audit fix

- Update axios from ^1.13.6 to ^1.15.2 to fix high-severity vulnerabilities (SSRF, prototype pollution, CRLF injection)
- Run npm audit fix to patch transitive dependencies
- Resolves dependency-audit CI failure

Co-authored-by: CyberClaw <noreply@openclaw.ai>

frontend/package.json

@@ -22,7 +22,7 @@
     "@radix-ui/react-tooltip": "^1.2.8",
     "@types/js-yaml": "^4.0.9",
     "@xyflow/react": "^12.10.1",
-    "axios": "^1.13.6",
+    "axios": "^1.15.2",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "dagre": "^0.8.5",