fix(P0-001): add missing typescript-eslint dep, format all files

Add typescript-eslint to root devDependencies (required by eslint
flat config). Run prettier across all files. Exclude QA reports
from git.

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

apps/web/next-env.d.ts

@@ -0,0 +1,6 @@
+/// <reference types="next" />
+/// <reference types="next/image-types/global" />
+import './.next/types/routes.d.ts';
+
+// NOTE: This file should not be edited
+// see https://nextjs.org/docs/app/api-reference/config/typescript for more information.