Upgrade frontend toolchain to latest majors

Bump React 19.2, Relay 21, React Router 8, Vite 8 with
@vitejs/plugin-react 6, ESLint 10, GraphQL 17, TypeScript 6,
@types/node 24, and Tailwind 4.3 across the workspaces.

vite-plugin-react 6 (Vite 8) no longer runs Babel, so the Relay
tagged-template transform now runs through @rolldown/plugin-babel
in the console and trust Vite configs.

Relay 21 ships first-party types and enables the ambiguous-alias
check by default; disable that flag to preserve existing queries
and add explicit usePreloadedQuery type arguments where the new
types no longer infer the operation. TypeScript 6 deprecations and
stricter inference are addressed in tsconfigs and call sites.

Keep n8n-node on ESLint 9 and eslint-plugin-react on 7.37.5, the
newest releases compatible with their toolchains.

Signed-off-by: Émile Ré <emile@probo.com>

packages/cookie-banner/package.json

@@ -56,6 +56,6 @@
   },
   "devDependencies": {
     "esbuild": "^0.28.1",
-    "typescript": "~5.8.3"
+    "typescript": "~6.0.3"
   }
 }

packages/cookie-banner/src/detectors/cookie-detector.ts

@@ -113,6 +113,7 @@ export class CookieDetector implements Detector {
 
     this.cookieStoreHandler = (event: CookieChangeEvent) => {
       for (const cookie of event.changed) {
+        if (cookie.name === undefined) continue;
         if (this.knownNames.has(cookie.name)) continue;
 
         const maxAge = cookie.expires