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/rect/setposition-float.md

@@ -0,0 +1,22 @@
+# Rect::SetPosition (float)
+
+```cpp
+void SetPosition(float newX, float newY)
+```
+
+设置矩形位置（保持尺寸不变）。
+
+**参数：**
+- `newX` - 新的左边界
+- `newY` - 新的上边界
+
+**返回：** `void`
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Rect rect(0.0f, 0.0f, 100.0f, 50.0f);
+rect.SetPosition(50.0f, 30.0f);  // rect 现在为 (50, 30, 100, 50)
+```