fix(diy-form): 更新提交按钮内边距映射表

对齐后端design.js的submitSizeMap，新增mini和huge尺寸的内边距配置

components-diy/diy-form.vue

@@ -122,8 +122,8 @@ export default {
 			const cfg = this.mergedFormConfig || {};
 			// 宽度百分比：clamp 到 10-100
 			const widthPct = Math.min(100, Math.max(10, this._num(cfg.submitWidthPercent, 100)));
-			// 上下内边距：与后端 design.js submitSizeMap 对齐（small/medium/large → 8/16/28 rpx）
-			const submitPaddingMap = { small: 8, medium: 16, large: 28 };
+			// 上下内边距：与后端 design.js submitSizeMap 对齐（mini/small/medium/large/huge → 0/4/12/24/40 rpx）
+			const submitPaddingMap = { mini: 0, small: 4, medium: 12, large: 24, huge: 40 };
 			const submitPaddingY = submitPaddingMap[cfg.submitSize] != null
 				? submitPaddingMap[cfg.submitSize]
 				: submitPaddingMap.medium;