DS Neck Fix

Fixes rendering compatibility between DragonSurvival and PaperDoll (tr7zw/Fuzs) and Ayame PaperDoll. Ensures the first-person dragon model rendered by these paper doll mods displays the neck and head correctly, along with some other compatibility fixes.

Compatibility fixes

• Neck and head now correctly visible in PaperDoll and Ayame-PaperDoll previews
• Dragon body no longer disappears while gliding in paper doll renders
• First-person body rotation no longer jitters when paper doll mods are active

Declaration: This mod was developed with the assistance of DeepSeek AI.