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/math/vector4/one.md

@@ -0,0 +1,17 @@
+# Vector4::One
+
+```cpp
+static Vector4 One()
+```
+
+返回单位向量 (1, 1, 1, 1)。
+
+**返回：** `Vector4` - 值为 (1, 1, 1, 1) 的向量
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Vector4 unit = Vector4::One();
+```