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/pipeline-state/apply-depth-stencil.md

@@ -0,0 +1,21 @@
+# OpenGLPipelineState::ApplyDepthStencil
+
+```cpp
+void ApplyDepthStencil();
+```
+
+应用深度模板状态到 OpenGL。
+
+**线程安全：** ❌
+
+**示例：**
+
+```cpp
+pipelineState->SetDepthStencilState(dsState);
+pipelineState->ApplyDepthStencil();
+```
+
+## 相关文档
+
+- [OpenGLPipelineState 总览](pipeline-state.md) - 返回类总览
+- [Apply](apply.md) - 应用所有状态