fix: improve doc link navigation and tree display

- Fix link resolution with proper relative/absolute path handling
- Improve link styling with underline decoration
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- Fix log file path for packaged app

docs/api/math/vector3/project.md

@@ -0,0 +1,23 @@
+# Vector3::Project
+
+```cpp
+static Vector3 Project(const Vector3& vector, const Vector3& onNormal)
+```
+
+将向量投影到法线向量上。
+
+**参数：**
+- `vector` - 要投影的向量
+- `onNormal` - 投影到的法线向量
+
+**返回：** `Vector3` - 投影结果。如果法线长度为 0，返回零向量。
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Vector3 v(1.0f, 1.0f, 0.0f);
+Vector3 normal(1.0f, 0.0f, 0.0f);
+Vector3 projected = Vector3::Project(v, normal);  // (1, 0, 0)
+```