Add /site API (#19631)

web/app/components/develop/template/template_advanced_chat.en.mdx

@@ -1305,6 +1305,64 @@ Chat applications support session persistence, allowing previous chat history to
 </Row>
 ---
 
+<Heading
+  url='/site'
+  method='GET'
+  title='Get Application WebApp Settings'
+  name='#site'
+/>
+<Row>
+  <Col>
+  Used to get the WebApp settings of the application.
+  ### Response
+  - `title` (string) WebApp name
+  - `chat_color_theme` (string) Chat color theme, in hex format
+  - `chat_color_theme_inverted` (bool) Whether the chat color theme is inverted
+  - `icon_type` (string) Icon type, `emoji` - emoji, `image` - picture
+  - `icon` (string) Icon. If it's `emoji` type, it's an emoji symbol; if it's `image` type, it's an image URL
+  - `icon_background` (string) Background color in hex format
+  - `icon_url` (string) Icon URL
+  - `description` (string) Description
+  - `copyright` (string) Copyright information
+  - `privacy_policy` (string) Privacy policy link
+  - `custom_disclaimer` (string) Custom disclaimer
+  - `default_language` (string) Default language
+  - `show_workflow_steps` (bool) Whether to show workflow details
+  - `use_icon_as_answer_icon` (bool) Whether to replace 🤖 in chat with the WebApp icon
+  </Col>
+  <Col>
+  <CodeGroup title="Request" tag="POST" label="/meta" targetCode={`curl -X GET '${props.appDetail.api_base_url}/site' \\\n-H 'Authorization: Bearer {api_key}'`}>
+    ```bash {{ title: 'cURL' }}
+    curl -X GET '${props.appDetail.api_base_url}/site' \
+    -H 'Authorization: Bearer {api_key}'
+    ```
+
+    </CodeGroup>
+
+    <CodeGroup title="Response">
+    ```json {{ title: 'Response' }}
+    {
+      "title": "My App",
+      "chat_color_theme": "#ff4a4a",
+      "chat_color_theme_inverted": false,
+      "icon_type": "emoji",
+      "icon": "😄",
+      "icon_background": "#FFEAD5",
+      "icon_url": null,
+      "description": "This is my app.",
+      "copyright": "all rights reserved",
+      "privacy_policy": "",
+      "custom_disclaimer": "All generated by AI",
+      "default_language": "en-US",
+      "show_workflow_steps": false,
+      "use_icon_as_answer_icon": false,
+    }
+    ```
+    </CodeGroup>
+  </Col>
+</Row>
+___
+
 <Heading
   url='/apps/annotations'
   method='GET'