feat(ui): ✨ add context menu and clipboard import/export for providers

chore: unify author signatures and translate Chinese comments to English

feat(ui): optimize custom environment variable addition with selection list

chore: 🙈 fix gitignore to properly ignore xcuserdata

fix(sparkle): 🔧 remove manual background check to avoid permission warning

fix: implement Sparkle user driver delegate to suppress warnings

feat: add ZenMux AI provider support

docs: add readme and license

refactor: simplify app version display

feat: add MiniMax AI provider support

feat: add AnyRouter and LongCat provider support

chore: update app delegate and version

chore: update localization metadata

feat(app): switch to appkit popover

feat(ui): add footer donate link