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/descriptor-pool/get-descriptor-count.md

@@ -0,0 +1,19 @@
+# RHIDescriptorPool::GetDescriptorCount
+
+```cpp
+virtual uint32_t GetDescriptorCount() const = 0;
+```
+
+获取描述符数量。
+
+**返回：** 描述符池中的描述符数量
+
+**示例：**
+
+```cpp
+uint32_t count = descriptorPool->GetDescriptorCount();
+```
+
+## 相关文档
+
+- [RHIDescriptorPool 总览](descriptor-pool.md) - 返回类总览