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/d3d12/buffer/map.md

@@ -0,0 +1,27 @@
+# D3D12Buffer::Map
+
+## 函数签名
+
+```cpp
+void* Map() override
+```
+
+## 中文描述
+
+将缓冲区内存映射到 CPU 可访问地址。仅对 UPLOAD 或 READBACK 堆有效。
+
+## 返回值
+
+`void*` - 映射的内存指针
+
+## 复杂度
+
+O(1)
+
+## 示例
+
+```cpp
+void* mapped = uploadBuffer.Map();
+memcpy(mapped, vertexData, sizeof(vertexData));
+buffer.Unmap();
+```