KoHs Offhand Whitelist

Changelog - 1.21.2 - 1.21.5

Code Changes

• Ported the unified responsive GUI architecture used in the base range.
• Preserved animated tab navigation and unified button rendering for all action controls.
• Maintained dual searchable lists (Whitelist and Non-Whitelist) with consistent row/action mapping.
• Kept OFF-state behavior with centered toggle and contextual helper panel.
• Standardized all visible player-facing strings to English.
• Improved Report Issues panel composition (texture fit + action button placement).

Migration Notes

• Updated client texture rendering usage to the API shape required for this range (DrawContext.drawTexture with GUI textured layer path).
• Manifest dependency declaration was migrated from exact Minecraft target to range-based compatibility (>=1.21.2 <=1.21.5).