refactor(components): squared shapes + mono data cells across all components

frontend/src/components/LoadingState.tsx

@@ -4,9 +4,9 @@ export function LoadingState({ label = 'Loading…' }: { label?: string }): JSX.
       role="status"
       aria-live="polite"
       data-testid="loading-state"
-      className="flex items-center justify-center py-section text-graphite text-[16px]"
+      className="flex items-center justify-center py-section text-graphite text-[16px] font-mono"
     >
-      <span className="inline-block h-2 w-2 rounded-pill bg-primary animate-pulse mr-sm" />
+      <span className="inline-block h-2 w-2 bg-primary animate-pulse mr-sm" />
       {label}
     </div>
   );