fixup: remove stray closing brace left after rebase

The rebase onto origin/feat/multicloud-web-frontend (which merged the
buildTrendFilterDesc removal in PR #747) left an orphaned closing brace
at frontend/src/dashboard.ts:624 that TypeScript rejected. Drop the
brace so the file compiles cleanly on the rebased base.

Author: cristim

frontend/src/dashboard.ts

@@ -623,7 +623,6 @@ export function formatTrendAxisTick(tsMs: number, intervalHint: 'hourly' | 'dail
   }
   return d.toLocaleDateString('en-US', { month: 'short', day: 'numeric' });
 }
-}
 
 /**
  * Load the savings-over-time trend chart for the dashboard. Fetches the