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/shader/unbind.md

@@ -0,0 +1,13 @@
+# RHIShader::Unbind
+
+```cpp
+virtual void Unbind() = 0;
+```
+
+解绑着色器。
+
+**复杂度：** O(1)
+
+## 相关文档
+
+- [RHIShader 总览](shader.md) - 返回类总览