Tensura Backpack Expansion

Tensura Material Backpacks adds custom material backpack upgrades for Gear Evolution with full Sophisticated Backpacks compatibility.

This mod adds standalone backpack items for custom material tiers so the backpack evolution chain works properly instead of pointing to missing items. It is designed for packs that use Gear Evolution together with Sophisticated Backpacks and custom Tensura-related progression materials.

Features
- Adds custom backpack item variants for:
  - Low Magisteel
  - High Magisteel
  - Pure Magisteel
  - Adamantite
  - Hihiirokane
- Fixes the backpack evolution path for custom material progression
- Uses Sophisticated Backpacks-compatible backpack items

Requirements
- Tensura Base Mod
- Sophisticated Backpacks
- Sophisticated Core
- Gear Evolution