feat(ui): show more languages in top languages chart

Increase from 10 to 14 rows so languages visible in the contribution
graph (e.g. Svelte, C++) also appear in the legend.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/components/TopLanguages.tsx

@@ -3,7 +3,7 @@ import { useQuery } from '@tanstack/react-query';
 
 import { fetchRepoLanguages } from '../api/client';
 
-const MAX_LANGS = 10;
+const MAX_LANGS = 14;
 
 export function TopLanguages() {
   const langsQ = useQuery({