First Class Flying 1.2.1

This update adds Builder Flight, expands configuration options, improves flight presentation, and fixes several input and Elytra swap edge cases.

Highlights

• Added Builder Flight, a controlled flight mode designed for building in the air.
• Added Infinite Flying options, including separate controls for Builder Flight and Powered Flight.
• Improved the Mod Menu config screen with sliders, better default-value display, and clearer numeric controls.
• Added and aligned English and Simplified Chinese UI text.
• Refined Builder Flight wing visuals and sound behavior.
• Reduced Builder Flight moving flap loudness by default.
• Kept Builder Flight silent while hovering in place.
• Improved Elytra/Chestplate Swap behavior with safer server-side checks, Binding Curse protection, and configurable fall-distance timing.
• Fixed Shift+Space input behavior so sneaking and jumping from the ground no longer accidentally triggers FCF flight or Vanilla Glide.
• Improved server/client compatibility handling when joining servers with or without FCF installed.

Validation

• Built for all maintained target folders.
• Startup smoke tested on 1.21.11 and 26.1.
• Gameplay feel was manually tested in the main development environment.

Please report any version-specific issues.

License

All Rights Reserved.