refactor: Update bottom controls for improved styling and functionality

- Adjusted button styles across various components for consistency and better UX.
- Enhanced layout of action controls to utilize whitespace more effectively.
- Updated slider styles for a more modern appearance and improved usability.
- Refined input fields and labels for better accessibility and readability.
- Introduced new app surface styles for a cohesive design across the application.
- Added tests for canvas cursor behavior to ensure correct cursor display during operations.

view/GenerationJobStatus.tsx

@@ -20,7 +20,7 @@ export function GenerationJobStatus({ generation, compact = false }: { generatio
   const label = job.status === "running" ? `${job.label} ${formatElapsed(elapsed)}` : job.status === "failed" ? job.error ?? `${job.label} failed` : job.status === "cancelled" ? `${job.label} cancelled` : `${job.label} complete`;
   const tone = job.status === "failed" ? "bg-red-500/15 text-red-100" : job.status === "running" ? "bg-white/10 text-white/70" : job.status === "cancelled" ? "bg-amber-500/15 text-amber-100" : "bg-emerald-500/15 text-emerald-100";
 
-  return <span className={`${compact ? "max-w-56" : "max-w-80"} truncate rounded-full px-3 py-2 text-xs font-medium ${tone}`} title={label} aria-live="polite">{label}</span>;
+  return <span className={`${compact ? "max-w-48" : "max-w-72"} truncate rounded-md px-2 py-1 text-[0.68rem] font-medium ${tone}`} title={label} aria-live="polite">{label}</span>;
 }
 
 function formatElapsed(seconds: number) {