chore(docs,uniapp_v2): 问题文档改为 fsgx 前缀；更新小程序 manifest appid

- docs: issues-0325/0327 重命名为 fsgx-issues-0325/0327
- uniapp_v2 manifest: 更新 DCloud appid

Made-with: Cursor

pro_v3.5.1/view/uniapp_v2/manifest.json

@@ -1,6 +1,6 @@
 {
     "name" : "阿胶黄精粉",
-    "appid" : "__UNI__518D050",
+    "appid" : "__UNI__6691FE3",
     "description" : "阿胶黄精粉商城",
     "versionName" : "3.5.1",
     "versionCode" : 351,