chore(deps): batch dependency updates, pnpm v11 migration, and fix integration cache

Batch-update dependencies from 17 open renovate PRs:
- @modelcontextprotocol/sdk 1.26→1.29, tiptap 3.25→3.26, ioredis 5.11.0→5.11.1
- mysql2 3.22.4→3.22.5, sql.js ^1.12→^1.14, @types/react 19.2.16→19.2.17
- oxlint ^1.67→^1.68, oxfmt ^0.53→^0.54, concurrently ^9→^10, mantine-contextmenu ^7→^9
- postcss ^8.4→^8.5.10 (security), @fec/remark-a11y-emoji ^3→^4

Migrate docs Tailwind CSS v3 → v4:
- Replace tailwindcss v3 + autoprefixer with tailwindcss v4 + @tailwindcss/postcss
- Convert config from tailwind.config.js to CSS @theme block
- Update PostCSS plugin in docusaurus.config.ts

Upgrade GitHub Actions:
- configure-pages v5→v6, upload-pages-artifact v4→v5, deploy-pages v4→v5
- EndBug/add-and-commit v9→v10, git-auto-commit-action v5→v7

Migrate pnpm v10 → v11 (unblocks #5679):
- Move package.json#pnpm config to pnpm-workspace.yaml
- Convert onlyBuiltDependencies/ignoredBuiltDependencies to allowBuilds map
- Migrate .npmrc settings (nodeLinker, strictPeerDependencies, engineStrict)
- Update packageManager to pnpm@11.5.2

Fix proxmox-api undici type incompatibility:
- Cast fetch parameter to resolve type mismatch between bundled undici versions

Fix integration cache not invalidating after create/update/delete:
- Add utils.integration.all.invalidate() to all mutation onSuccess handlers
- Previously only Next.js server cache was revalidated, not client tRPC cache

apps/docs/package.json

@@ -32,25 +32,25 @@
     "@scalar/api-reference-react": "catalog:",
     "@signalwire/docusaurus-plugin-llms-txt": "^1.2.2",
     "@tabler/icons-react": "catalog:",
-    "autoprefixer": "^10.5.0",
+    "@tailwindcss/postcss": "^4.3.0",
     "clsx": "catalog:",
     "dayjs": "catalog:",
     "docusaurus-plugin-image-zoom": "^3.0.1",
     "leader-line-new": "^1.1.9",
-    "postcss": "^8.4.32",
+    "postcss": "^8.5.10",
     "posthog-docusaurus": "^2.0.5",
     "prism-react-renderer": "^2.4.1",
     "random-word-slugs": "^0.1.7",
     "react": "catalog:",
     "react-dom": "catalog:",
     "swiper": "^12.2.0",
-    "tailwindcss": "^3.4.19"
+    "tailwindcss": "^4.3.0"
   },
   "devDependencies": {
     "@docusaurus/module-type-aliases": "^3.10.1",
     "@docusaurus/tsconfig": "^3.10.1",
     "@docusaurus/types": "^3.10.1",
-    "@fec/remark-a11y-emoji": "^3.1.0",
+    "@fec/remark-a11y-emoji": "^4.0.2",
     "@tsconfig/docusaurus": "^2.0.9",
     "@types/react": "catalog:",
     "@types/react-dom": "catalog:",