Punishment Gear 3.0.3 - Hybrid side carrier + rear detail pass

- Preserved the approved 3.0.2 front geometry and Painted skull artwork.
- Added a padded ballistic side base panel on each side while retaining the layered straps and compact clasps.
- Refined rear plate material separation, piping, weave and strap cues using texture rather than rebuilding the rear geometry.
- Preserved 3.0.2 shoulder/rear connectivity, pants, boots, gameplay and all compiled Java classes.

Static/package and software-preview validation only; a Forge client test is required.
