chore: 配置生产环境地址并清除默认登录凭据

- 配置生产环境后端地址为 viewshanghai.com
- 配置生产环境上传地址
- 清除默认登录账号密码，提升安全性

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.vscode/extensions.json

@@ -10,6 +10,7 @@
     "uni-helper.uni-highlight-vscode",
     "uni-helper.uni-ui-snippets-vscode",
     "uni-helper.uni-app-snippets-vscode",
-    "streetsidesoftware.code-spell-checker"
+    "streetsidesoftware.code-spell-checker",
+    "anthropic.claude-code"
   ]
 }