Fix CI: run next typegen before tsc so route-aware types resolve

This Next.js version generates LayoutProps/PageProps/RouteContext
into .next/types only via `next dev`, `next build`, or `next typegen`
(see node_modules/next/dist/docs .../06-cli/next.md). Typecheck ran
`tsc --noEmit` standalone before Build, so those globals didn't exist
yet, failing with "Cannot find name 'LayoutProps'".

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
         run: npm run lint
 
       - name: Typecheck
-        run: npx tsc --noEmit
+        run: npx next typegen && npx tsc --noEmit
 
       - name: Test
         run: npm test