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/n8n-node/package.json

@@ -56,6 +56,6 @@
   },
   "devDependencies": {
     "@n8n/node-cli": "^0.24.1",
-    "eslint": "^9.39.2"
+    "eslint": "^9.39.4"
   }
 }

packages/n8n-node/tsconfig.json

@@ -3,6 +3,7 @@
     "strict": true,
     "module": "commonjs",
     "moduleResolution": "node",
+    "ignoreDeprecations": "6.0",
     "target": "es2019",
     "lib": ["es2019", "es2020", "es2022.error"],
     "removeComments": true,