Automatically open editor after screenshot

[omaxel]

It would be nice to have an option (enable/disable) to automatically open the editor after the screenshot has been taken. It would speed up the process of editing and sharing the picture.

Anyway, very nice app!

[tembo]

Some helpful context for implementing this feature:

Existing infrastructure to build on:
There's already a similar preference for recordings at Sources/Models/AppPreferences.swift:116-119 called recordingOpenEditor with a toggle in RecordingSettingsTab. This same pattern could be followed for screenshots.

Key files for the screenshot flow:

• Sources/Capture/CaptureOrchestrator.swift - The galleryApplyAndSave() function (line 111) is where the capture pipeline ends. Currently it always calls PreviewOverlay.shared.show() at line 145.
• Sources/Preview/PreviewOverlay.swift - The openAnnotateEditor() function (line 49) already handles opening the correct editor based on file type (image vs video).

Implementation approach:
A new preference like screenshotOpenEditor could be added to AppPreferences.swift, with logic in galleryApplyAndSave() to either:

1. Call EditorWindowController.shared.open(url:on:) directly instead of/in addition to showing the preview overlay
2. Or call PreviewOverlay.shared.openAnnotateEditor() immediately after showing the preview

The toggle could go in CaptureSettingsTab in Sources/Settings/PreferencesView.swift, following the existing pattern around line 674 for recordings.