fix(web): exclude test files from tsconfig to fix type-check

Test matcher types (toBeInTheDocument etc.) from @testing-library/jest-dom
were not globally visible to tsc because module augmentations from setup.ts
don't propagate across unconnected files in the same compilation. Excluding
test files from the main tsconfig is the standard Next.js + Vitest pattern.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/tsconfig.json

@@ -14,5 +14,5 @@
     }
   },
   "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
-  "exclude": ["node_modules"]
+  "exclude": ["node_modules", "**/*.test.ts", "**/*.test.tsx", "**/*.spec.ts", "**/*.spec.tsx"]
 }