重构作品分享链路

统一发布分享弹窗为作品分享卡片

支持下载分享卡与小程序九宫切图保存

小程序复制链接改为可直达作品详情的 web-view 路径

修复本地 dev Rust 构建绕过损坏 sccache

补充分享链路与 dev 启动文档和测试

miniprogram/pages/share-grid/index.wxss

@@ -0,0 +1,60 @@
+page {
+  background: #fffdf9;
+}
+
+.share-grid-page {
+  min-height: 100vh;
+  box-sizing: border-box;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 48rpx;
+  background: #fffdf9;
+}
+
+.share-grid-card {
+  width: 100%;
+  max-width: 560rpx;
+  box-sizing: border-box;
+  border: 1rpx solid rgba(127, 85, 57, 0.18);
+  border-radius: 16rpx;
+  background: rgba(255, 255, 255, 0.92);
+  padding: 36rpx;
+  box-shadow: 0 24rpx 68rpx rgba(127, 85, 57, 0.12);
+}
+
+.share-grid-title {
+  color: #332820;
+  font-size: 34rpx;
+  font-weight: 700;
+  line-height: 1.35;
+}
+
+.share-grid-text {
+  margin-top: 18rpx;
+  color: rgba(51, 40, 32, 0.68);
+  font-size: 26rpx;
+  line-height: 1.55;
+}
+
+.share-grid-text--danger {
+  color: #b84a3d;
+}
+
+.share-grid-button {
+  margin-top: 28rpx;
+  width: 100%;
+  border-radius: 8rpx;
+  background: #7f5539;
+  color: #fffdf9;
+  font-size: 28rpx;
+  line-height: 2.6;
+}
+
+.share-grid-canvas {
+  position: fixed;
+  left: -9999px;
+  top: -9999px;
+  width: 1px;
+  height: 1px;
+}