feat: add some icon

src/components/ImageSlider.svelte

@@ -19,7 +19,6 @@
     _img.addEventListener("load", () => {
       img.classList.remove("thumb-loading");
       _img.style.opacity = "1";
-      console.log("loaded");
     });
     if (_img?.alt) altText = _img.alt;
     else altText = "";
@@ -128,6 +127,10 @@
     display: none;
   }
 
+  .images :global(.thumb-loading)::before {
+    opacity: 0;
+  }
+
   .images :global(.active) {
     position: relative;
     display: block !important;