Remove pause button from header (Sub-Task 3)

- Removed pause button from TimeDisplay component
- Removed pause-related props (paused, onTogglePause) from TimeDisplay
- Cleaned up unused imports (Play, Pause from lucide-react, Button)
- Updated page.tsx to pass insight prop instead of pause props
- Header now shows: game title, day/hour, and insight display

src/app/page.tsx

@@ -181,8 +181,7 @@ export default function ManaLoopGame() {
               <TimeDisplay
                 day={store.day}
                 hour={store.hour}
-                isPaused={store.paused}
-                togglePause={store.togglePause}
+                insight={store.insight}
               />
             </div>
           </div>