feat: refactor Daily components and enhance UI integration

- Replaced `DailyCalendar` with a new `Calendar` component for improved functionality and consistency.
- Introduced `AlertBanner` to replace `DeadlineReminder`, providing a more flexible way to display urgent tasks.
- Updated `DailyAddForm` to use new options for task types, enhancing user experience when adding tasks.
- Removed unused state and components, streamlining the DailyPageClient for better performance and maintainability.
- Enhanced `DailySection` to utilize new `CheckboxItem` format for better integration with the UI.
- Cleaned up imports and improved overall structure for better readability.

src/components/ui/Tabs.tsx

@@ -0,0 +1,45 @@
+'use client';
+
+export interface TabItem {
+  id: string;
+  label: string;
+  icon?: string;
+  count?: number;
+  disabled?: boolean;
+}
+
+interface TabsProps {
+  items: TabItem[];
+  activeTab: string;
+  onTabChange: (tabId: string) => void;
+  className?: string;
+}
+
+export function Tabs({ items, activeTab, onTabChange, className = '' }: TabsProps) {
+  return (
+    <div className={`border-b border-[var(--border)] ${className}`}>
+      <nav className="flex space-x-8">
+        {items.map((item) => (
+          <button
+            key={item.id}
+            onClick={() => !item.disabled && onTabChange(item.id)}
+            disabled={item.disabled}
+            className={`py-3 px-1 border-b-2 font-medium text-sm transition-colors ${
+              activeTab === item.id
+                ? 'border-[var(--primary)] text-[var(--primary)]'
+                : 'border-transparent text-[var(--muted-foreground)] hover:text-[var(--foreground)]'
+            } ${item.disabled ? 'opacity-50 cursor-not-allowed' : 'cursor-pointer'}`}
+          >
+            <span className="flex items-center gap-2">
+              {item.icon && <span>{item.icon}</span>}
+              <span>{item.label}</span>
+              {item.count !== undefined && (
+                <span className="text-xs opacity-75">({item.count})</span>
+              )}
+            </span>
+          </button>
+        ))}
+      </nav>
+    </div>
+  );
+}