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
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# Viewport
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渲染视口结构体,用于屏幕到归一化坐标的映射。
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**头文件:** `#include <XCEngine/Math/Rect.h>`
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**命名空间:** `XCEngine::Math`
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## 结构体定义
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```cpp
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struct Viewport {
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float x = 0.0f;
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float y = 0.0f;
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float width = 0.0f;
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float height = 0.0f;
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float minDepth = 0.0f;
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float maxDepth = 1.0f;
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Viewport() = default;
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Viewport(float x, float y, float w, float h);
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Viewport(float x, float y, float w, float h, float minD, float maxD);
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};
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```
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## 构造函数
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| 方法 | 描述 |
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|------|------|
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| `Viewport()` | 默认构造 |
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| `Viewport(x, y, w, h)` | 2D 视口 |
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| `Viewport(x, y, w, h, minD, maxD)` | 带深度范围的 3D 视口 |
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## 方法
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| 方法 | 返回值 | 描述 |
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|------|--------|------|
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| [GetAspectRatio()](viewport-getaspectratio.md) | `float` | 宽高比 (width / height) |
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| [GetRect()](viewport-getrect.md) | `Rect` | 转换为 Rect |
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## 相关文档
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- [Math 模块总览](../math.md) - 返回 Rect 模块总览
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- [Rect](rect-overview.md) - 浮点矩形
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- [RectInt](rectint.md) - 整数矩形
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