[Bugs] the text in the session is stuttering when I type in the buttom

**Mood:** 😔
**Category:** Bugs

the text in the session is stuttering when I type in the buttom

---
| Field | Value |
| --- | --- |
| App version | 1.0.9 |
| OS | macOS 26.3.0 |
| Theme | Remedy Tilted |
| Path | /chat |
| Tenure | Week 6 |

Start by reproducing the typing stutter in the /chat path on macOS 26.3.0 with app version 1.0.9 and the Remedy Tilted theme. Determine whether the issue occurs specifically in the session input and document the steps and conditions that trigger it. Done means typing is responsive without visible stuttering in the affected session.

索引モデルが issue の本文から書いたものです。