feat: APP 配置新增企业微信 Schema，写入 Info.plist wxworkSchema 键

与微信登录 AppID 处理一致：填写则写入 Info.plist 的 wxworkSchema，
未配置则移除该键。前端「关联配置」区新增输入框，打包流程透传该字段。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011wQh7H1Dn3TjQm87TyYgvf

frontend/src/views/ConfigView.vue

@@ -488,6 +488,12 @@
             <input v-model="appForm.weixinpay" type="text" placeholder="wx...">
           </div>
         </div>
+        <div class="form-row">
+          <div class="form-group">
+            <label>企业微信 Schema</label>
+            <input v-model="appForm.wxworkSchema" type="text" placeholder="不填则不写入 Info.plist（与微信登录 AppID 相同）">
+          </div>
+        </div>
         <div class="form-row">
           <div class="form-group">
             <label>腾讯 AppID</label>
@@ -883,6 +889,7 @@ const openAppModal = (id = null, app = null) => {
       UniversalLink: '',
       weixinlogin: '',
       weixinpay: '',
+      wxworkSchema: '',
       tencent: '',
       AlivcLicenseKey: '',
       app_id_prefix_override: '',