Fix color scheme logic in TaskPage component to ensure consistent button styling based on task accessibility. Simplified the color scheme condition for better readability and maintainability.

src/pages/task/TaskPage.tsx

@@ -169,7 +169,7 @@ export const TaskPage = () => {
                       key={t.id}
                       size="sm"
                       variant={isCurrent ? 'solid' : isAccessible ? 'outline' : 'ghost'}
-                      colorScheme={isCurrent ? 'teal' : isAccessible ? 'gray' : 'gray'}
+                      colorScheme={isCurrent ? 'teal' : 'gray'}
                       // @ts-expect-error Chakra UI v2 uses isDisabled
                       isDisabled={!isAccessible}
                       onClick={() => isAccessible && handleNavigateToTask(t.id)}