fix: improve doc link navigation and tree display

- Fix link resolution with proper relative/absolute path handling
- Improve link styling with underline decoration
- Hide leaf nodes from tree, only show directories
- Fix log file path for packaged app

docs/api/resources/iloader/getsupportedextensions.md

@@ -0,0 +1,25 @@
+# IResourceLoader::GetSupportedExtensions
+
+```cpp
+Containers::Array<Containers::String> GetSupportedExtensions() const
+```
+
+获取此加载器支持的文件扩展名列表。用于 `CanLoad` 判断和编辑器中资源类型识别。
+
+**参数：** 无
+
+**返回：** 支持的扩展名数组（如 `{".png", ".jpg", ".bmp"}`）
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Containers::Array<Containers::String> TextureLoader::GetSupportedExtensions() const {
+    return {".png", ".jpg", ".jpeg", ".bmp", ".tga", ".dds"};
+}
+```
+
+## 相关文档
+
+- [IResourceLoader 总览](iloader.md) - 返回类总览