feat: upgrade major dependencies to latest versions

- Prisma 6.19 → 7.7 (driver adapter pattern, prisma.config.ts)
- TypeScript 5.9 → 6.0 (ignoreDeprecations, CSS type declarations)
- Vitest 3.2 → 4.1
- Pino 9.14 → 10.3
- @types/node 22.x → 25.x

All 307 tests pass, typecheck clean, build succeeds.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/tsconfig.json

@@ -20,7 +20,8 @@
     "sourceMap": false,
     "noEmit": true,
     "allowJs": true,
-    "isolatedModules": true
+    "isolatedModules": true,
+    "allowArbitraryExtensions": true
   },
   "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
   "exclude": ["node_modules", ".next"]