KoHs Inventory Tweaks

Supported build

• Minecraft 1.21.10
• Fabric Loader 0.19.3+
• Fabric API 0.138.4+1.21.10
• Java 21+
• Client-side only; Mod Menu is optional

Technical changes

• Added the isolated Minecraft 1.21.10 implementation and source tree.
• Ported rendering, widgets, input hooks, resources, and mixins to the 1.21.10 mapped APIs.
• Corrected player-model rendering in the main menu preview, customization previews, GUI Scaler, and the real inventory by keeping entity bounds and scissor coordinates in the same coordinate space.
• Removed the unsupported Nautilus inventory preview and its unused localization entries on 1.21.10.
• Added a responsive startup-failure history panel to Issues Tracker. It records confirmed startup blockers and related startup crash reports only when the culprit is explicitly attributable.
• Preserved the original immediate offhand behavior; no artificial delay is added to normal hotbar-to-offhand input.

Validation

• Clean Gradle build and remapped JAR completed successfully.
• Launched through Fabric in the Test 1.21.10 Modrinth instance.
• Reached a stable Minecraft screen with no KoHs mixin, injection, or classloading errors.

SHA-256: E9A0D357FE56D5E09E8C63C1F5687164322FF73AC7BCF195A406ABD5466B5AF4