Update Icon requirements and add Banner field to registry specifications (#175)

* Update Icon requirements and add Banner field to registry specifications

- Update Icon maximum resolution from 800x400 to 400x400
- Add requirement for square aspect ratio for icons
- Add new optional Banner field with 21:9 aspect ratio requirement
- Update example to include Banner field

🤖 Generated with [Claude Code](https://claude.ai/code)

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

* Improve Icon and Banner descriptions to mention ComfyUI Registry and ComfyUI-Manager

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: robinjhuang

registry/specifications.mdx

@@ -157,16 +157,28 @@ DisplayName = "Super Resolution Node"
 ```
 
 ### Icon (optional)
-URL to your custom node's icon.
+URL to your custom node's icon that will be displayed on the ComfyUI Registry and ComfyUI-Manager.
 
 **Requirements:**
 - File types: SVG, PNG, JPG, or GIF
-- Maximum resolution: 800px × 400px
+- Maximum resolution: 400px × 400px
+- Aspect ratio should be square
 
 ```toml
 Icon = "https://raw.githubusercontent.com/username/repo/main/icon.png"
 ```
 
+### Banner (optional)
+URL to a larger banner image that will be displayed on the ComfyUI Registry and ComfyUI-Manager.
+
+**Requirements:**
+- File types: SVG, PNG, JPG, or GIF
+- Aspect ratio: 21:9
+
+```toml
+Banner = "https://raw.githubusercontent.com/username/repo/main/banner.png"
+```
+
 ### requires-comfyui (optional)
 Specifies which version of ComfyUI your node is compatible with. This helps users ensure they have the correct version of ComfyUI installed.
 
@@ -215,5 +227,6 @@ Documentation = "https://github.com/username/super-resolution-node/wiki"
 PublisherId = "image-wizard"
 DisplayName = "Super Resolution Node"
 Icon = "https://raw.githubusercontent.com/username/super-resolution-node/main/icon.png"
+Banner = "https://raw.githubusercontent.com/username/super-resolution-node/main/banner.png"
 requires-comfyui = ">=1.0.0"  # ComfyUI version compatibility
 ```

zh-CN/registry/specifications.mdx

@@ -159,16 +159,28 @@ DisplayName = "Super Resolution Node"
 ```
 
 ### Icon（可选）
-你的自定义节点的图标 URL。
+你的自定义节点的图标 URL，将在 ComfyUI Registry 和 ComfyUI-Manager 中显示。
 
 **要求：**
 - 文件类型：SVG, PNG, JPG, 或 GIF
-- 最大分辨率：800px × 400px
+- 最大分辨率：400px × 400px
+- 长宽比应该是正方形
 
 ```toml
 Icon = "https://raw.githubusercontent.com/username/repo/main/icon.png"
 ```
 
+### Banner（可选）
+URL 指向一个较大的横幅图像，将在 ComfyUI Registry 和 ComfyUI-Manager 中显示。
+
+**要求：**
+- 文件类型：SVG, PNG, JPG, 或 GIF
+- 长宽比：21:9
+
+```toml
+Banner = "https://raw.githubusercontent.com/username/repo/main/banner.png"
+```
+
 ### requires-comfyui（可选）
 指定你的节点兼容的 ComfyUI 版本。这有助于用户确保他们安装了正确版本的 ComfyUI。
 
@@ -218,5 +230,6 @@ Documentation = "https://github.com/username/super-resolution-node/wiki"
 PublisherId = "image-wizard"
 DisplayName = "Super Resolution Node"
 Icon = "https://raw.githubusercontent.com/username/super-resolution-node/main/icon.png"
+Banner = "https://raw.githubusercontent.com/username/super-resolution-node/main/banner.png"
 requires-comfyui = ">=1.0.0"  # ComfyUI 版本兼容性
 ```