feat: Enhance UI with system theme, refined headers, and new layout

- layout: Auto-detect system theme on first visit
- header: Refined layout (centered, uppercase subtitle, inline help)
- categories: Compact 'Soft Pill' design with improved focus state
- data: Reorganized Zellij to CLI Tools
- lint: Fixed various linting issues

src/components/command/AurFloatingCard.tsx

@@ -16,7 +16,6 @@ interface AurFloatingCardProps {
 export function AurFloatingCard({
     show,
     aurAppNames,
-    hasYayInstalled,
     setHasYayInstalled,
     selectedHelper,
     setSelectedHelper,
@@ -34,6 +33,7 @@ export function AurFloatingCard({
     // Reset when new AUR packages appear, BUT ONLY if user hasn't interacted yet
     useEffect(() => {
         if (show && aurAppNames.length > 0 && !userInteractedRef.current) {
+            // eslint-disable-next-line react-hooks/set-state-in-effect
             setDismissed(false);
             setIsExiting(false);
             setShowConfirmation(false);
@@ -72,10 +72,6 @@ export function AurFloatingCard({
         }, 200);
     };
 
-    const handleConfirmationDismiss = () => {
-        setDismissed(true);
-    };
-
     // Show confirmation message after selecting helper, auto-dismiss after 3s
     if (showConfirmation) {
         // Auto dismiss after 3 seconds