[FEATURE] Hide uninstalled apps from Software & Apps list after removal #763

Summary

After uninstalling Windows Apps (e.g. Bing Search, Xbox, Copilot) in Winhance, the cards remain visible in the Software & Apps list even though the packages are no longer installed. This is confusing — especially on Windows 11 IoT Enterprise LTSC, where many catalog apps were never installed in the first place.

Current behavior

• The Windows Apps tab shows a fixed catalog of all known apps.
• Uninstalled / never-installed items stay in the list (checkbox empty / not marked installed).
• Winhance reports Successfully removed N apps, and ChangeHistory records the removals, but the UI still shows those cards.
• On LTSC, the BloatRemoval script often logs Packages not found: ... for Bing/Xbox/Copilot-style package names, yet the UI still lists them as if they were removable targets the user just failed to delete.

Expected behavior

• After a successful uninstall (or when detection confirms the package is not installed), the item should disappear from the visible list (or at least be hideable via a toggle such as "Show only installed apps").
• Optionally keep a separate filter / toggle:
  • Show only installed (default for cleanup workflows)
  • Show all catalog apps (for reinstall / discovery)

Why this matters

Users interpret "still listed" as "uninstall failed". On LTSC / debloated systems this is especially common, because many catalog entries were never present.

Suggested implementation (minimal)

In WindowsAppsViewModel:

• Extend FilterItem / WindowsAppsFiltered / CapabilitiesFiltered / OptionalFeaturesFiltered to exclude !IsInstalled when a preference like HideUninstalledApps is enabled.
• Persist the preference in UserPreferences.json.
• Add a UI toggle near the existing "Select All Installed / Not Installed" checkboxes.
• Refresh the filter after CheckInstallationStatusAsync / uninstall completion (NotifyCardViewProperties already exists).

Also consider applying the same option to External Apps if desired, but Windows Apps is the higher-priority case for debloat workflows.

Environment

• Winhance v26.06.12
• OS: Windows 11 IoT Enterprise LTSC 2024 25H2 (Build 26200)
• Repro: Software & Apps → select Bing Search / Xbox / Copilot → Remove → list still shows the cards (empty checkbox)

Related

• Existing "Select All Installed / Select All Not Installed" shows that installation status is already tracked; what's missing is a visibility filter, not detection alone.