Introduces EchConfigList and EchForceQuery fields to ProfileItem and V2rayConfig models, updates related handlers and services to process these fields, and extends the AddServerWindow UI to allow user input for ECH configuration. Also adds localization entries for the new fields and updates extension methods for string handling.
Shortcut key hints (e.g., '(Ctrl+C)', '(Delete)') were removed from various menu item translations in resource files for all supported languages. This improves consistency and clarity in UI text across the application.
Introduces options to specify custom PAC file and system proxy script paths for system proxy settings. Updates configuration models, view models, UI bindings, and logic for Linux/OSX proxy handling and PAC management to use these custom paths if provided. Also adds UI elements and localization for the new settings.