build: standardise on react 19 and deduplicate deps

Eliminates dual React ecosystems and reduces dependency
duplication by consolidating on a single React version and
expanding the pnpm workspace catalog.

- Upgrade all packages from React 18 to React 19
- Remove @types/react and @types/node overrides (no longer
  needed with single React version)
- Standardise @types/node to ^22 across all packages
- Add prisma-kysely>@prisma/internals override to eliminate
  old prisma 6.16.x subtree
- Fix React 19 type changes: useRef requires initial value,
  JSX namespace needs explicit import, RefObject includes null
- Expand catalog with 14 new entries (ai, dotenv, pino,
  playwright, prisma tooling, nodemailer, pdfjs-dist, etc.)
- Catalog radix-ui, next, lucide-react, postcss, and
  typescript for docs/openpage-api alignment
- Run pnpm dedupe to collapse peer-dep context duplicates

apps/docs/package.json

@@ -10,27 +10,27 @@
     "postinstall": "fumadocs-mdx"
   },
   "dependencies": {
-    "@radix-ui/react-tabs": "^1.1.13",
+    "@radix-ui/react-tabs": "catalog:",
     "fumadocs-core": "16.5.0",
     "fumadocs-mdx": "14.2.6",
     "fumadocs-ui": "16.5.0",
-    "lucide-react": "^0.563.0",
+    "lucide-react": "catalog:",
     "mermaid": "^11.12.2",
-    "next": "16.1.6",
+    "next": "catalog:",
     "next-plausible": "^3.12.5",
     "next-themes": "^0.4.6",
-    "react": "^19.2.4",
-    "react-dom": "^19.2.4",
+    "react": "catalog:",
+    "react-dom": "catalog:",
     "tailwind-merge": "^3.4.0"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4.1.18",
     "@types/mdx": "^2.0.13",
-    "@types/node": "^25.1.0",
-    "@types/react": "^19.2.10",
-    "@types/react-dom": "^19.2.3",
-    "postcss": "^8.5.6",
+    "@types/node": "catalog:",
+    "@types/react": "catalog:",
+    "@types/react-dom": "catalog:",
+    "postcss": "catalog:",
     "tailwindcss": "^4.1.18",
-    "typescript": "^5.9.3"
+    "typescript": "catalog:"
   }
 }

apps/openpage-api/package.json

@@ -12,7 +12,9 @@
   "dependencies": {
     "@documenso/prisma": "workspace:*",
     "luxon": "catalog:",
-    "next": "16.1.6"
+    "next": "catalog:",
+    "react": "catalog:",
+    "react-dom": "catalog:"
   },
   "devDependencies": {
     "@types/node": "catalog:",