[General] Dictation input can't be resumed after pausing — requires keyboard to continue

**Mood:** 😔
**Category:** General

Dictation input can't be resumed after pausing — requires keyboard to continue
When composing a prompt using voice dictation (e.g., macOS dictation), stopping dictation and then trying to restart it in the same input field doesn't work. The cursor or input seems to lose focus, and the text field won't accept new dictation input after the first dictation session ends. You have to physically type something first before dictation will work again.
Steps to reproduce: Start a new prompt using voice dictation, stop dictating, then try to resume dictating in the same input field.
Expected: Dictation resumes and appends to the existing prompt.
Actual: Nothing happens until you type with the keyboard first.
Environment: macOS (system-level dictation)

---
| Field | Value |
| --- | --- |
| App version | 1.0.0 |
| OS | macOS 26.5.1 |
| Theme | Noctis Azureus |
| Path | /chat |
| Tenure | Week 3 |

从 /chat 的 prompt 输入框开始，使用 macOS 系统听写功能重现暂停和恢复流程。跟踪听写停止时 focus 的处理方式，然后验证恢复后会在现有 prompt 后追加内容，而无需键盘输入。

由索引模型根据 Issue 内容生成。