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/command-queue/signal.md

@@ -0,0 +1,17 @@
+# D3D12CommandQueue::Signal
+
+```cpp
+void Signal(RHIFence* fence, uint64_t value) override;
+```
+
+发送信号。
+
+**参数：**
+- `fence` - 栅栏指针
+- `value` - 信号值
+
+**复杂度：** O(1)
+
+## 相关文档
+
+- [D3D12CommandQueue 总览](command-queue.md) - 返回类总览