feat(图片预览): 将图片预览功能提取到mixin并优化点击处理

重构图片预览功能，将其从diy-picture组件移至mixin实现，便于复用
优化diy-rubik-cube组件的点击处理逻辑，支持无链接时预览图片
统一处理图片预览和页面跳转的条件判断

components-diy/diy-picture.vue

@@ -52,17 +52,6 @@ export default {
 		}
 	},
 	methods: {
-		previewImg(img) {
-			// #ifdef MP-WEIXIN
-			uni.previewImage({
-				current: 0,
-				urls: [this.$util.img(img)],
-				success: function (res) { },
-				fail: function (res) { },
-				complete: function (res) { },
-			})
-			// #endif
-		},
 		redirectTo(link) {
 			if (link.wap_url) {
 				if (this.$util.getCurrRoute() == this.$util.MEMBER_PAGE_URL && !this.storeToken) {
@@ -77,7 +66,9 @@ export default {
 			await this.__$emitEvent({
 				eventName: 'picture-tap', data: item, promiseCallback: (event, handler, awaitedResult) => {
 					if (!awaitedResult) return;
-					if (item.link.wap_url) {
+
+					const link = item.link;
+					if (link?.name || link?.wap_url || link?.appid) {
 						this.redirectTo(item.link);
 					} else {
 						this.previewImg(item.imageUrl);