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/rectint-contains.md

@@ -0,0 +1,24 @@
+# RectInt::Contains
+
+```cpp
+bool Contains(int32_t px, int32_t py) const
+```
+
+检测整数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
+RectInt rect(0, 0, 1920, 1080);
+if (rect.Contains(pixelX, pixelY)) {
+    // 像素在矩形内
+}
+```