chore(deps-dev): bump @types/node from 25.9.3 to 26.0.0 in /dashboard (#4797)

Bumps @types/node from 25.9.3 to 26.0.0 in /dashboard. Dev-only type definitions; declares Node.js 26 API types (none used by dashboard). Transitive undici-types auto-bumped 7.24.6 → 8.3.0. CI on Node 22 — no type errors.

Tier 1 auto-merge per dependabot rules. CI green (17/17, 2 skipped).

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

dashboard/package-lock.json

@@ -44,7 +44,7 @@
     "@testing-library/react": "^16.0.0",
     "@types/canvas-confetti": "^1.9.0",
     "@types/dompurify": "^3.0.5",
-    "@types/node": "^25.9.3",
+    "@types/node": "^26.0.0",
     "@types/react": "^19.2.17",
     "@types/react-dom": "^19.0.3",
     "@vitejs/plugin-react": "^6.0.1",