Add shortcut management: register/unregister shortcuts dynamically
via IPC from the frontend settings. Add --quick-entry CLI argument
to show quick entry on launch or toggle it when a second instance
is started. Add show-main-window IPC handler for Ctrl+Enter task
open flow.
Add a complete OAuth 2.0 PKCE flow for the Electron desktop app:
- Implement PKCE code generation and token exchange in Electron
- Register custom protocol handler (vikunja-desktop://) for deep links
- Handle deep link race conditions (buffered URLs, process.argv fallback)
- Prevent duplicate IPC listener accumulation on re-mount
- Preserve sub-paths in OAuth authorize URL for non-root deployments
- Add token refresh support using Electron's net module
kolaente