feat: Guest wishlist localStorage + visual state

Guest Wishlist Implementation:
Problem: Guests couldn't persist wishlist, no visual feedback on wishlisted items
Solution: Implemented localStorage-based guest wishlist system

Changes:
1. localStorage Storage:
   - Key: 'woonoow_guest_wishlist'
   - Stores array of product IDs
   - Persists across browser sessions
   - Loads on mount for guests

2. Dual Mode Logic:
   - Guest (not logged in): localStorage only
   - Logged in: API + database
   - isInWishlist() works for both modes

3. Visual State:
   - productIds Set tracks wishlisted items
   - Heart icons show filled state when in wishlist
   - Works in ProductCard, Product page, etc.

Result:
✅ Guests can add/remove items (persists in browser)
✅ Heart icons show filled state for wishlisted items
✅ No login required when guest wishlist enabled
✅ Seamless experience for both guests and logged-in users

Files Modified:
- customer-spa/src/hooks/useWishlist.ts (localStorage implementation)
- customer-spa/dist/app.js (rebuilt)

Note: Categories/Tags/Attributes pages already exist as placeholder pages

customer-spa/src/hooks/useWishlist.ts

@@ -16,6 +16,8 @@ interface WishlistItem {
   added_at: string;
 }
 
+const GUEST_WISHLIST_KEY = 'woonoow_guest_wishlist';
+
 export function useWishlist() {
   const [items, setItems] = useState<WishlistItem[]>([]);
   const [isLoading, setIsLoading] = useState(false);
@@ -26,10 +28,36 @@ export function useWishlist() {
   const isEnabled = settings?.wishlist_enabled !== false;
   const isLoggedIn = (window as any).woonoowCustomer?.user?.isLoggedIn;
 
+  // Load guest wishlist from localStorage
+  const loadGuestWishlist = useCallback(() => {
+    try {
+      const stored = localStorage.getItem(GUEST_WISHLIST_KEY);
+      if (stored) {
+        const guestIds = JSON.parse(stored) as number[];
+        setProductIds(new Set(guestIds));
+      }
+    } catch (error) {
+      console.error('Failed to load guest wishlist:', error);
+    }
+  }, []);
+
+  // Save guest wishlist to localStorage
+  const saveGuestWishlist = useCallback((ids: Set<number>) => {
+    try {
+      localStorage.setItem(GUEST_WISHLIST_KEY, JSON.stringify(Array.from(ids)));
+    } catch (error) {
+      console.error('Failed to save guest wishlist:', error);
+    }
+  }, []);
+
   // Load wishlist on mount
   useEffect(() => {
-    if (isEnabled && isLoggedIn) {
+    if (isEnabled) {
+      if (isLoggedIn) {
         loadWishlist();
+      } else {
+        loadGuestWishlist();
+      }
     }
   }, [isEnabled, isLoggedIn]);
 
@@ -49,6 +77,17 @@ export function useWishlist() {
   }, [isLoggedIn]);
 
   const addToWishlist = useCallback(async (productId: number) => {
+    // Guest mode: store in localStorage only
+    if (!isLoggedIn) {
+      const newIds = new Set(productIds);
+      newIds.add(productId);
+      setProductIds(newIds);
+      saveGuestWishlist(newIds);
+      toast.success('Added to wishlist');
+      return true;
+    }
+
+    // Logged in: use API
     try {
       await api.post('/account/wishlist', { product_id: productId });
       await loadWishlist(); // Reload to get full product details
@@ -59,9 +98,20 @@ export function useWishlist() {
       toast.error(message);
       return false;
     }
-  }, [loadWishlist]);
+  }, [isLoggedIn, productIds, loadWishlist, saveGuestWishlist]);
 
   const removeFromWishlist = useCallback(async (productId: number) => {
+    // Guest mode: remove from localStorage only
+    if (!isLoggedIn) {
+      const newIds = new Set(productIds);
+      newIds.delete(productId);
+      setProductIds(newIds);
+      saveGuestWishlist(newIds);
+      toast.success('Removed from wishlist');
+      return true;
+    }
+
+    // Logged in: use API
     try {
       await api.delete(`/account/wishlist/${productId}`);
       setItems(items.filter(item => item.product_id !== productId));
@@ -76,7 +126,7 @@ export function useWishlist() {
       toast.error('Failed to remove from wishlist');
       return false;
     }
-  }, [items]);
+  }, [isLoggedIn, productIds, items, saveGuestWishlist]);
 
   const toggleWishlist = useCallback(async (productId: number) => {
     if (productIds.has(productId)) {