feat(editor): reveal saved screenshots in Files

[devmobasa]

What changed

Adds two ways to reveal a saved screenshot in Files:

• Hold Shift while saving:
  • Ctrl+Shift+S
  • Shift+Enter
  • Shift-click Save or Copy+Save
• Click the saved-capture notification’s “Click to show in folder” action.

Files opens with the screenshot selected. Normal save behavior remains unchanged and does not open
Files automatically.

Implementation

• Uses uwsm-app -- nautilus --select <file-url>.
• Runs reveal work outside the UI thread.
• Treats reveal failure as non-fatal; the screenshot remains saved.
• Converts relative output destinations to absolute file URLs before invoking Files.
• Reuses one reveal implementation for keyboard, toolbar, and notification actions.

The notification action previously reopened the exported image in Omasnap. Editable captures remain
available from the Recent captures shelf.

Testing

Added smoke coverage for:

• Ctrl+Shift+S
• Shift+Enter
• Shift-click Save
• Shift-click Copy+Save
• Normal save without immediate reveal
• Notification reveal arguments
• Relative screenshot destinations
• Absolute notification image and reveal paths

make check passes.

[Copilot]

🟡 Changes recommended

The detached-command log synchronization can make the new smoke test intermittently read incomplete arguments.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Adds asynchronous screenshot reveal support through Nautilus, available via Shift-modified saves and notification actions.

Changes:

• Adds shared file-reveal command handling.
• Integrates reveal gestures into editor shortcuts and toolbar actions.
• Updates documentation and smoke coverage.

File summaries

File	Description
src/capture.cpp	Implements reveal and notification commands.
src/capture.hpp	Exposes the reveal helper.
src/editor.cpp	Connects reveal gestures to saving.
src/editor.hpp	Updates editor method signatures.
tests/editor-smoke.cpp	Tests reveal flows and arguments.
README.md	Documents commands and shortcuts.
docs/dependencies.md	Documents optional reveal dependencies.

Review details

• Files reviewed: 7/7 changed files
• Comments generated: 1
• Review effort level: Balanced

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[tobi]

Reviewed against current main and tested as part of the combined integration check. Process launch stays on the export worker and uses the current safe argv notification action.