feat: move svelte interface to 'src/interface'

src/interface/components/MotionDiv.svelte

@@ -0,0 +1,83 @@
+<script lang="ts">
+  import { onMount, onDestroy, createEventDispatcher } from 'svelte';
+  import { animate as motionAnimate, spring } from 'motion';
+
+  let { initial, animate, exit, transition, children, class: className } = $props<{ 
+    initial?: any, 
+    animate?: any, 
+    exit?: any, 
+    transition?: any, 
+    children?: any, 
+    class?: string 
+  }>();
+
+  let divElement: HTMLElement;
+  const dispatch = createEventDispatcher();
+
+  const playAnimation = (keyframe: any) => {
+    if (divElement && keyframe) {
+      let animationOptions = transition;
+      let finalKeyframe = { ...keyframe };
+
+      if (finalKeyframe.height === 'auto') {
+        const prevHeight = divElement.style.height;
+        const prevVisibility = divElement.style.visibility;
+        
+        divElement.style.height = 'auto';
+        divElement.style.visibility = 'hidden';
+        divElement.style.position = 'absolute';
+        
+        const autoHeight = divElement.offsetHeight;
+        
+        divElement.style.height = prevHeight;
+        divElement.style.visibility = prevVisibility;
+        divElement.style.position = '';
+        
+        finalKeyframe.height = `${autoHeight}px`;
+      }
+
+      if (!transition || transition.type === 'spring') {
+        const springConfig = transition?.config || { stiffness: 250, damping: 25 };
+        animationOptions = {
+          ...transition,
+          easing: spring(springConfig)
+        };
+      }
+
+      const animation = motionAnimate(divElement, finalKeyframe, animationOptions);
+      return animation.finished;
+    }
+    return Promise.resolve();
+  };
+
+  onMount(async () => {
+    if (initial) {
+      Object.assign(divElement.style, initial);
+      await playAnimation(animate || {});
+    } else if (animate) {
+      await playAnimation(animate);
+    }
+
+    dispatch('animationend');
+  });
+  
+  $effect(() => {
+    if (animate) {
+      playAnimation(animate);
+    }
+
+    dispatch('animationend');
+  });
+
+  onDestroy(async () => {
+    if (exit) {
+      await playAnimation(exit);
+    }
+  });
+</script>
+
+<div class={className} bind:this={divElement} style="will-change: transform, opacity;">
+  {#if children}
+    {@render children()}
+  {/if}
+</div>