Fix hide item option not working in Program plugin

[Copilot]

Hide item context menu action showed success but item remained visible due to race condition—ReQuery() executed before DisableProgramAsync completed, and cache wasn't cleared.

Changes

• Fix race condition: Wrap disable/requery in Task.Run(async...) to await completion before ReQuery()
• Clear cache: Call ResetCache() after disabling to ensure fresh query results
• Fix logic bug: Replace .First() with .FirstOrDefault() + null check to avoid exception when program not in UWP list (needed to fall through to Win32 check)
• Add error handling: Wrap in try-catch with logging; move success message after operation completes

// Before: fire-and-forget race condition
_ = DisableProgramAsync(program);
Context.API.ShowMsg(...);  // Shows immediately
Context.API.ReQuery();     // Queries before disable completes

// After: proper async sequencing
_ = Task.Run(async () =>
{
    try
    {
        await DisableProgramAsync(program);
        ResetCache();
        Context.API.ShowMsg(...);
        Context.API.ReQuery();
    }
    catch (Exception e)
    {
        Context.API.LogException(ClassName, "Failed to disable program", e);
    }
});

Original prompt

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This section details on the original issue you should resolve

<issue_title>BUG: Hide item option does not work</issue_title>
<issue_description>### Checks

• I have checked that this issue has not already been reported.

• I am using the latest version of Flow Launcher.

• I am using the prerelease version of Flow Launcher.

Problem Description

After hiding an item from the dropdown list, the item remains visible afterwards.

To Reproduce

1. Open Flow, search for an item, right click on it and press Hide
2. The popup notification appears, saying: "Success! Successfully disabled this program from displaying in your query"
3. The item remains in the query
4. Clear the query and search for the item again afterwards, it still remains visible.

Screenshots

No response

Flow Launcher Version

2.0.3

Windows Build Number

10.0.26200.7171

Error Log

N/A</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes BUG: Hide item option does not work #4139

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