xammen7/7/2026, 5:42:58 PM

Add a hard mute option in the flyout app focus menu that keeps an app muted across relaunch and reboot, keyed by ExeName.

- AppSettings: HardMutedAppEntriesJson persistence with IsAppHardMuted/SetAppHardMuted, HardMutedAppsChanged event, case-insensitive dedup and corrupt-entry skipping
- DeviceViewModel.AddSession: force-mute a hard-muted app whenever a session appears; ApplyHardMuteState re-applies on change
- DeviceCollectionViewModel: ToggleHardMuteApp enables mute immediately and unmutes when disabled
- FocusedAppItemViewModel: checkable menu item with dynamic label (keep muted / stop keeping muted)
- SettingsExportService: HardMutedAppsJson export/import passthrough
- Localized EN/FR strings + Resources.Designer.cs

Parent13b8b88