[1. Improve useragent settings](useragent: Added built-in UA switch option (you can turn this switch off if Karing is blocked by some VPN service providers).)

IOS/TvOS AppStore: (Search Keywords: karing vpn) https://apps.apple.com/us/app/karing/id6472431552 IOS/TvOS TestFlight: https://testflight.apple.com/join/RLU59OsJ