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/render-target-view/get-framebuffer.md

@@ -0,0 +1,19 @@
+# OpenGLRenderTargetView::GetFramebuffer
+
+```cpp
+unsigned int GetFramebuffer() const
+```
+
+获取帧缓冲区对象 ID。
+
+**返回：** `unsigned int` - 帧缓冲区 ID
+
+**示例：**
+
+```cpp
+unsigned int fbo = rtv.GetFramebuffer();
+```
+
+## 相关文档
+
+- [OpenGLRenderTargetView](render-target-view.md) - 返回类总览