feat: 添加统一比例复选框的禁用逻辑，依赖于统一大小选项

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

@@ -70,6 +70,7 @@ async function saveUnifiedRatio() {
       type="checkbox"
       bind:checked={unifiedRatio}
       onchange={saveUnifiedRatio}
+      disabled={!unifiedSize}
       class="checkbox" />
     Unified Ratio
   </label>