The app doesn't take advantage of the available horizontal space.

The app doesn't take advantage of the available horizontal space. On large screens, chat content is constrained to a narrow center column, so wide content like markdown tables requires horizontal scrolling despite ample empty space on both sides.

---
| Field | Value |
| --- | --- |
| App version | 1.1.13 |
| OS | macOS 26.6.2 |
| Theme | Chai |
| Path | /chat |
| Tenure | Week 10 |

从 /chat 视图开始，使用 issue 的 Markdown 表格示例在大尺寸 macOS 屏幕上复现布局。跟踪聊天内容容器，并通过确认可用的水平空间得到利用且宽表格不再需要不必要的水平滚动来验证修复。

由索引模型根据 Issue 内容生成。