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/ui/package.json

@@ -42,7 +42,7 @@
     "remark-gfm": "^4.0.1",
     "tailwind-merge": "^3.4.0",
     "tailwind-variants": "^1.0.0",
-    "tailwindcss": "^4.1.7",
+    "tailwindcss": "^4.3.1",
     "tw-animate-css": "^1.3.0",
     "zustand": "^5.0.4"
   },
@@ -54,27 +54,27 @@
     "@storybook/react": "^10.2.8",
     "@storybook/react-vite": "^10.2.8",
     "@tailwindcss/typography": "^0.5.16",
-    "@tailwindcss/vite": "^4.1.17",
-    "@types/react": "^19.1.2",
-    "@types/react-dom": "^19.1.2",
-    "@vitejs/plugin-react": "^5.1.4",
+    "@tailwindcss/vite": "^4.3.1",
+    "@types/react": "^19.2.17",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^6.0.2",
     "@vitest/browser": "4.1.8",
     "@vitest/coverage-v8": "4.1.8",
-    "eslint": "^9.39.2",
+    "eslint": "^10.5.0",
     "playwright": "^1.55.1",
-    "react": "^19.1.0",
+    "react": "^19.2.7",
     "react-docgen": "^7.1.1",
-    "react-dom": "^19.1.0",
-    "react-router": "^7.17.0",
+    "react-dom": "^19.2.7",
+    "react-router": "^8.0.0",
     "storybook": "^10.2.10",
-    "typescript": "~5.8.3",
-    "vite": "^7.3.2",
+    "typescript": "~6.0.3",
+    "vite": "^8.0.16",
     "vitest": "^4.1.8"
   },
   "peerDependencies": {
-    "react": "^19.1.0",
-    "react-dom": "^19.1.0",
-    "react-router": "^7.17.0"
+    "react": "^19.2.7",
+    "react-dom": "^19.2.7",
+    "react-router": "^8.0.0"
   },
   "volta": {
     "node": "24.4.0"