sidebar isn't showing diffs for all files that are changed

sidebar isn't showing diffs for all files that are changed

---
| Field | Value |
| --- | --- |
| App version | 1.0.23 |
| OS | Windows 10.0.26652 |
| Theme | Selene Selenized |
| Path | /chat |
| Tenure | Week 8 |

Start by reproducing the issue in the /chat path using app version 1.0.23 on Windows 10.0.26652 with the Selene Selenized theme, then compare the changed files with the files shown in the sidebar. Done means every changed file has its diff represented in the sidebar.

索引モデルが issue の本文から書いたものです。