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/contains-float.md

@@ -0,0 +1,24 @@
+# Rect::Contains (float)
+
+```cpp
+bool Contains(float px, float py) const
+```
+
+检测浮点坐标点是否在矩形内。
+
+**参数：**
+- `px` - 点的 x 坐标
+- `py` - 点的 y 坐标
+
+**返回：** `bool` - 点在矩形内（包含边界）返回 true
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+Rect screenRect(0.0f, 0.0f, 1920.0f, 1080.0f);
+if (screenRect.Contains(mouseX, mouseY)) {
+    // 鼠标在屏幕矩形内
+}
+```