feat: 更新复选框样式为切换开关，提升用户体验

src/routes/dataset/meta-form/UnifiedSizeChoice.svelte

@@ -57,7 +57,7 @@ async function saveUnifiedRatio() {
       sizeFeedback === 'updated' && 'text-green-600',
       sizeFeedback === 'not-updated' && 'text-red-600',
     ]}>
-    <input type="checkbox" bind:checked={unifiedSize} onchange={saveUnifiedSize} class="checkbox" />
+    <input type="checkbox" bind:checked={unifiedSize} onchange={saveUnifiedSize} class="toggle" />
     Unified Size
   </label>
   <label
@@ -71,7 +71,7 @@ async function saveUnifiedRatio() {
       bind:checked={unifiedRatio}
       onchange={saveUnifiedRatio}
       disabled={!unifiedSize}
-      class="checkbox" />
+      class="toggle" />
     Unified Ratio
   </label>
 </div>