Update index.html

index.html

@@ -659,11 +659,15 @@
           drawW = Math.round(drawW * ratio);
           drawH = Math.round(drawH * ratio);
         }
-        canvas.width  = drawW;
-        canvas.height = drawH;
-        canvas.getContext('2d').drawImage(img, 0, 0, drawW, drawH);
-      };
-      img.src = 'hikari.jpg';
+          canvas.width  = drawW;
+          canvas.height = drawH;
+          canvas.getContext('2d').drawImage(img, 0, 0, drawW, drawH);
+          URL.revokeObjectURL(blobUrl);
+        };
+        img.src = blobUrl;
+      } catch (err) {
+        setStatus('error', `Không thể tải ảnh mẫu: ${err.message}`);
+      }
     });
 
     // ── ImagePreprocessor ─────────────────────────────────────────────────────