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/rhi/opengl/texture/generate-mipmap.md

@@ -0,0 +1,18 @@
+# OpenGLTexture::GenerateMipmap
+
+```cpp
+void GenerateMipmap()
+```
+
+生成纹理的 mipmap。
+
+**示例：**
+
+```cpp
+texture.LoadFromFile("assets/textures/wood.jpg");
+texture.GenerateMipmap();
+```
+
+## 相关文档
+
+- [OpenGLTexture](texture.md) - 返回类总览