feat: auto-load images when user stops typing link (500ms debounce)

src/lib/components/wishlist/ItemForm.svelte

@@ -49,37 +49,50 @@
   let color = $state<string | null>(item?.color || null);
   let scrapedImages = $state<string[]>([]);
   let isLoadingImages = $state(false);
+  let debounceTimer: ReturnType<typeof setTimeout> | null = null;
 
   // Form action based on mode
   const formAction = isEdit ? '?/updateItem' : '?/addItem';
   const submitLabel = isEdit ? t.form.saveChanges : t.wishlist.addWish;
   const titleLabel = isEdit ? t.wishlist.editWish : t.form.addNewWish;
 
-  async function handleLinkChange(event: Event) {
+  async function scrapeImages(url: string) {
+    if (!url || !url.startsWith('http')) return;
+    
+    isLoadingImages = true;
+    scrapedImages = [];
+
+    try {
+      const response = await fetch('/api/scrape-images', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ url })
+      });
+
+      if (response.ok) {
+        const data = await response.json();
+        scrapedImages = data.images || [];
+      }
+    } catch (error) {
+      console.error('Failed to scrape images:', error);
+    } finally {
+      isLoadingImages = false;
+    }
+  }
+
+  function handleLinkInput(event: Event) {
     const input = event.target as HTMLInputElement;
     linkUrl = input.value;
-
-    if (linkUrl && linkUrl.startsWith('http')) {
-      isLoadingImages = true;
-      scrapedImages = [];
-
-      try {
-        const response = await fetch('/api/scrape-images', {
-          method: 'POST',
-          headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify({ url: linkUrl })
-        });
-
-        if (response.ok) {
-          const data = await response.json();
-          scrapedImages = data.images || [];
-        }
-      } catch (error) {
-        console.error('Failed to scrape images:', error);
-      } finally {
-        isLoadingImages = false;
-      }
+    
+    // Clear existing timer
+    if (debounceTimer) {
+      clearTimeout(debounceTimer);
     }
+    
+    // Set new timer to scrape after user stops typing for 500ms
+    debounceTimer = setTimeout(() => {
+      scrapeImages(linkUrl);
+    }, 500);
   }
 
   function handleColorChange() {
@@ -141,7 +154,7 @@
             type="url"
             placeholder="https://..."
             bind:value={linkUrl}
-            oninput={handleLinkChange}
+            oninput={handleLinkInput}
           />
         </div>