Add GGUF format and model detection FAQs to installation docs (#563)

* Update installation/manual_install.mdx

* Update zh-CN/installation/manual_install.mdx

* Update development/core-concepts/models.mdx

* Update zh-CN/development/core-concepts/models.mdx

* Revert changes

---------

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>
Co-authored-by: ComfyUI Wiki <[email protected]>

Author: mintlify[bot]

development/core-concepts/models.mdx

@@ -52,3 +52,19 @@ Model functionality can be extended with auxiliary models. For example, art dire
 ## Uninstalling models
 
 ComfyUI does not currently support uninstalling models through the frontend interface. If you want to remove or uninstall models, you need to manually delete the corresponding model files from the `ComfyUI/models/` directory on your system.
+
+## Common issues
+
+<AccordionGroup>
+  <Accordion title="Does ComfyUI support GGUF format models?">
+    ComfyUI does not natively support GGUF format models. To use GGUF models, you need to install community custom nodes such as [ComfyUI-GGUF](https://github.com/city96/ComfyUI-GGUF).
+  </Accordion>
+
+  <Accordion title="Why can't I find my model?">
+    If you've installed a model but can't find it in ComfyUI, try these steps:
+    
+    - Press the `r` key to refresh node definitions so ComfyUI can detect the model
+    - Restart ComfyUI
+    - Ensure the correct model is selected in the model loader node
+  </Accordion>
+</AccordionGroup>

zh-CN/development/core-concepts/models.mdx

@@ -52,3 +52,19 @@ description: "了解AI模型及其在ComfyUI中的作用"
 ## 卸载模型
 
 ComfyUI目前不支持通过前端界面卸载模型。如果您想要移除或卸载模型，需要手动删除系统中`ComfyUI/models/`目录下对应的模型文件。
+
+## 常见问题
+
+<AccordionGroup>
+  <Accordion title="ComfyUI 支持 GGUF 格式的模型吗?">
+    ComfyUI 原生并不支持 GGUF 格式,所以用户需要使用一些社区自定义节点来获取支持,如 [ComfyUI-GGUF](https://github.com/city96/ComfyUI-GGUF)。
+  </Accordion>
+
+  <Accordion title="为什么找不到我的模型?">
+    如果您已经安装了模型但在 ComfyUI 中找不到,请尝试以下步骤:
+    
+    - 安装模型后点击快捷键 `r` 来刷新节点定义,以便 ComfyUI 可以检测到
+    - 重启 ComfyUI
+    - 确保在模型加载节点对应的模型有被选中
+  </Accordion>
+</AccordionGroup>