[General] The "Open in default app" button does not open the currently selected file.

**Mood:** 😔
**Category:** General

The "Open in default app" button does not open the currently selected file.

---
| Field | Value |
| --- | --- |
| App version | 0.2.24 |
| OS | macOS 26.5.0 |
| Theme | Notionish |
| Path | /chat |
| Tenure | Day 2 (Week 1) |

Start at the /chat entry point and reproduce the "Open in default app" action on macOS 26.5.0 with app version 0.2.24. Trace how the currently selected file is passed to that action; done means the button opens that selected file in its default application rather than another or no file.

索引モデルが issue の本文から書いたものです。