- Add PluginStoreSettingsPage with header, language filters, and search
- Add PluginStoreSettingsViewModel with async loading and filtering
- Add PluginStoreItemViewModel for individual plugin cards with install/update/uninstall
- Connect AvaloniaPublicAPI to real PluginsManifest instead of empty stubs
- Use FluentAvalonia ItemsRepeater with UniformGridLayout for virtualization
- Fix icon visibility using ObjectConverters instead of StringConverters
- Add HotkeyRecorderDialog with global keyboard hook for capturing hotkeys
- Implement manual modifier state tracking to handle swallowed key events
- Add HotkeyControl button that opens the recorder dialog
- Add CheckAvailability and RemoveToggleHotkey to HotKeyMapper
- Expose GetKeyFromVk helper in GlobalHotkey infrastructure
- Add Settings pages (General, Plugin, Theme, Proxy, About)
- Add PreviewPanel for result previews in main window
- Fix hook reuse issue by clearing callback on close instead of disposing
