feat: 新增实验性微信卡片分享与自动部署能力

补充 Cloudflare Worker、R2 存储、微信 JS-SDK 签名与上传鉴权
增加自动部署 Skill 和配置引导文档
优化报告工具栏、微信卡片弹窗及窄屏响应式布局
补充 Worker 鉴权、卡片生成、过期清理与安全转义测试

services/share-card-worker/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "wechatexplorer-share-card-worker",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "wrangler dev",
+    "deploy": "wrangler deploy",
+    "check": "node --check src/index.js && node --test test/index.test.js"
+  },
+  "devDependencies": {
+    "wrangler": "^4.28.1"
+  }
+}