[General] In the left panel, on the [Group By] filter, it will be nice to have the filt...

**Mood:** 😊
**Category:** General

## Goal
Improve the left-sidebar **Group by** experience so users can group sessions by status **and** optionally narrow the list to one or more specific statuses.

## Problem
Today, the sidebar menu allows selecting **Group by = Status**, but it does not allow refining to specific status values (for example only **Open** or only **Working**). This makes the grouped view less useful when many sessions are present.

## Proposed UX
1. Keep **Group by** as a layout choice (Project / Status / Last updated).
2. Add a **Status filter** control for sidebar sessions.
3. Allow selecting specific values (example: Open, Working), with an **All statuses** default.
4. If **Group by = Status**, still show status groups, but only for the selected filtered values.
5. Persist the chosen filter and make active filtering visually clear.

## Why this helps
- Faster triage when many sessions are visible.
- Better focus on active work without switching to a different view.
- More consistent behavior with other filterable surfaces in the app.

## Suggested acceptance criteria
- User can select one or more status values from the sidebar filter.
- Sidebar content updates correctly in all group modes.
- Group-by-status view only displays selected status groups.
- Clearing filter returns to all statuses.
- Filter state persists across navigation/restart.
- Keyboard and screen-reader interaction works for the new filter controls.

## Test notes
- Verify on Windows first (reported environment), then macOS/Linux sanity pass.
- Validate behavior with large session lists and mixed statuses.

---
| Field | Value |
| --- | --- |
| App version | 1.0.10 |
| OS | Windows 10.0.26300 |
| Theme | GitHub |
| Path | /mywork |
| Tenure | Week 7 |

Commencez par le contrôle Group by de la barre latérale gauche et suivez le comportement existant de regroupement des sessions et de filtrage. Vérifiez comment l’état de la barre latérale est conservé et comment les contrôles de filtrage prennent en charge l’utilisation au clavier et avec un lecteur d’écran. C’est terminé lorsque les sélections de statut proposées fonctionnent dans tous les modes de regroupement, sont conservées lors de la navigation et du redémarrage, et passent les tests Windows-first avec des vérifications de cohérence sur macOS/Linux.

Rédigé par le modèle d'indexation à partir du texte de l'issue.