feat(shortcuts): Port to libadwaita 1.8

[mufeedali]

If I'm being honest, I don't quite like that Adw.ShortcutsDialog and related classes are so inflexible... I could only "add" the Translate shortcut item. But that means it's always at the end of the list.

[Copilot]

Pull request overview

This PR migrates the keyboard shortcuts dialog from a custom Gtk.ShortcutsWindow implementation to libadwaita 1.8's Adw.ShortcutsDialog. The migration involves removing the custom Python class and UI blueprint files, and replacing them with a simpler blueprint definition that is loaded dynamically when needed.

Changes:

• Replaced custom DialectShortcutsWindow with Adw.ShortcutsDialog loaded from resources
• Moved shortcuts action from window-level to application-level (win.show-help-overlay → app.shortcuts)
• Added dynamic insertion of the "Translate" shortcut when live translation is disabled

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
dialect/window.py	Removed import and initialization of custom shortcuts window
dialect/window.blp	Changed menu action from win.show-help-overlay to app.shortcuts; added formatting improvements
dialect/shortcuts.py	Deleted custom shortcuts window implementation
dialect/shortcuts.blp	Deleted old blueprint definition for custom shortcuts window
dialect/shortcuts-dialog.blp	Added new blueprint definition using Adw.ShortcutsDialog and Adw.ShortcutsItem
dialect/main.py	Added shortcuts action handler that loads dialog from resources and dynamically adds translate shortcut
dialect/meson.build	Updated blueprint file reference from shortcuts.blp to shortcuts-dialog.blp
dialect/dialect.gresource.xml	Updated resource reference and applied consistent formatting to file entries

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[Copilot]

Pull request overview

Copilot reviewed 8 out of 9 changed files in this pull request and generated 3 comments.

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