cev-api/Vapor ? reverse-engineered prompt

Build me a standalone Fabric client mod for Minecraft 26.2 that takes the recovered Vapor client and runs it without any native injector or DLL stuff. I want it to load like a normal client side mod, use the Fabric entrypoint and mixins, and hook into the game so the client can react to ticks, keyboard and mouse input, packet send and receive, world changes, rendering, and player movement events.

Please make the OpenGL based HUD and click GUI work in game, with Right Shift opening the menu, and keep the UI state saved between sessions. The mod should wait until the player is actually in a world before doing game specific setup, and it should play nicely with the modern Fabric client rendering flow.

Use the existing Java code as the base, keep it compatible with Java 25, and make sure it builds into a normal Fabric JAR. If anything is unclear from the current code, look up the current Fabric docs online and adjust it so the mod loads cleanly.