[Bugs] Swithing to the app from CLI doesn't continue session

**Mood:** 😔
**Category:** Bugs

Swithing to the app from CLI doesn't actually carry over the "context" of the CLI (working dir, session), it just opens the plain app.

---
| Field | Value |
| --- | --- |
| App version | 1.0.3 |
| OS | Windows 10.0.26637 |
| Theme | GitHub |
| Path | / |
| Tenure | Day 4 (Week 1) |

Start by tracing the handoff from the CLI to the desktop app, focusing on how the working directory and session context are passed. Reproduce the behavior on Windows 10 with app version 1.0.3, then verify that switching to the app preserves both the working directory and the active session instead of opening a plain app window.

索引モデルが issue の本文から書いたものです。