chore(docs): upgrade dependencies (#931)

* chore(docs): upgrade dependencies from PRs #923 and #926

Combine Renovate PRs #923 (minor dependency updates) and #926 (eslint major bump):
- Upgrade Next.js from 16.1.7 to 16.2.0 and related packages
- Update fumadocs (core/mdx/ui) to latest patch versions
- Bump Tailwind CSS 4.1.18 → 4.2.2 with supporting packages
- Update React 19.2.3 → 19.2.4 and related dependencies
- Update utilities: prettier, postcss, zod, wrangler, and others

Note: Skipped eslint 9 → 10 major bump due to upstream compatibility issues with
@typescript-eslint/utils (used by eslint-config-next). Will wait for typescript-eslint 9.x.

Verified: pnpm lint and Next.js build (all 144 pages generated successfully).

* chore(docs): revert next 16.2.0, keep other upgrades

Revert Next.js to 16.1.7 — @opennextjs/cloudflare doesn't handle the new
prefetch-hints.json manifest from Next.js 16.2, causing 500 errors on
Cloudflare Workers.

Also reverts eslint-config-next and @next/third-parties to match.

Author: kawaijoe

docs/package.json

@@ -48,44 +48,44 @@
     "cmdk": "^1.1.1",
     "date-fns": "^4.1.0",
     "embla-carousel-react": "^8.6.0",
-    "fumadocs-core": "16.6.16",
-    "fumadocs-mdx": "14.2.9",
-    "fumadocs-ui": "16.6.16",
+    "fumadocs-core": "16.6.17",
+    "fumadocs-mdx": "14.2.10",
+    "fumadocs-ui": "16.6.17",
     "input-otp": "^1.4.2",
     "lucide-react": "^0.577.0",
     "mermaid": "^11.13.0",
     "next": "16.1.7",
     "next-themes": "^0.4.6",
     "radix-ui": "^1.4.3",
-    "react": "^19.2.3",
-    "react-day-picker": "^9.13.0",
-    "react-dom": "^19.2.3",
-    "react-resizable-panels": "^4.7.2",
+    "react": "^19.2.4",
+    "react-day-picker": "^9.14.0",
+    "react-dom": "^19.2.4",
+    "react-resizable-panels": "^4.7.3",
     "remark-mdx": "^3.1.0",
     "remark-parse": "^11.0.0",
     "remark-stringify": "^11.0.0",
 
     "shiki": "^4.0.0",
     "unified": "^11.0.0",
     "sonner": "^2.0.7",
-    "tailwind-merge": "^3.4.0",
-    "zod": "^4.3.5"
+    "tailwind-merge": "^3.5.0",
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@stylistic/eslint-plugin": "^5.10.0",
-    "@tailwindcss/postcss": "^4.1.18",
+    "@tailwindcss/postcss": "^4.2.2",
     "@types/mdast": "^4.0.0",
     "@types/mdx": "^2.0.13",
     "@types/node": "^25.0.0",
-    "@types/react": "^19.2.7",
+    "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
     "eslint": "^9.39.4",
     "eslint-config-next": "16.1.6",
-    "postcss": "^8.5.6",
-    "prettier": "^3.7.4",
-    "tailwindcss": "^4.1.18",
+    "postcss": "^8.5.8",
+    "prettier": "^3.8.1",
+    "tailwindcss": "^4.2.2",
     "tw-animate-css": "^1.4.0",
     "typescript": "^5.9.3",
-    "wrangler": "^4.73.0"
+    "wrangler": "^4.75.0"
   }
 }