[Requests and ideas] Title: Context and Changes panel do not update when selecting a repository wi...

**Mood:** 🎉
**Category:** Requests and ideas

Title: Context and Changes panel do not update when selecting a repository with no active sessionsUser Story:As a developer managing multiple repositories in the Copilot App, I want the active chat context and "Changes" panel to switch automatically to a newly selected repository, even if that repository does not have any active sessions yet, so that I can immediately begin working in the new context.Current Behavior:When multiple repositories are open in the "Sessions" tree, selecting a repository name that contains no active sessions fails to update the application state. The "Changes" panel and the Copilot chat context remain stuck on the previously selected session/repository.Expected Behavior:Clicking a repository or project name in the left panel should immediately shift the global application context (including the Chat context and Changes panel) to that repository, regardless of its session history.

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| Field | Value |
| --- | --- |
| App version | 1.0.10 |
| OS | Windows 10.0.26200 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 7 |

Start at the /chat path and reproduce the issue by opening multiple repositories, then selecting one with no active sessions. Trace the state used by the Chat context and Changes panel; the work is done when selecting any repository updates both panels, including repositories without session history.

索引モデルが issue の本文から書いたものです。