Merge branch 'stack/agent-profiles-7-docs' into stack/agent-profiles-8-authoring

apps/web/tests/snapshots/models-settings/empty.expected.md

@@ -58,7 +58,7 @@
     - option "zai-coding-cn"
   - text: API 密钥
   - textbox "API 密钥":
-    - /placeholder: 输入 API 密钥
+    - /placeholder: 输入 API 密钥，或留空使用环境认证
   - group: 自定义设置
   - button "取消"
   - button "保存"