🐞 Image Zoom Doesnt Increase Image Size in Editor

### Description

When zooming in on an image (reproduced with jpg and png files), the image zooms in, but the borders of the image dont move out, causing the outside of the image to be cut off. Behaviour is normal for images of larger sizes (for example dimensions 1024x1024) but breaks for smaller images (largest I tested was dimensions 512x512)

(see screenshots below)

### To Reproduce

1. Open a folder with an image in the workspace
2. Open an image in the editor section
3. Attempt to zoom in on the image

### Expected Behavior

The borders of the image should expand so that the whole image remains in the editor tab.

### Version Information

CodeEdit: 0.3.4-alpha (45)
macOS: Sequoia 15.5
Xcode: 16.4 (16F6)

### Additional Context

_No response_

### Screenshots

The first screenshot shows how the image appears normally, and the below shows how zooming in will cut off certain sections

首先，在 macOS 上的图像编辑器中使用较小的 512x512 JPG 和 PNG 文件重现该问题，然后跟踪编辑器对缩放和图像边界的处理。完成的标准是：缩放时完整图像保持可见，同时其边界扩展，与 issue 中描述的预期行为一致。

由索引模型根据 Issue 内容生成。