Ars Fusion 0.2.0

For Minecraft 1.21.1 NeoForge and 1.20.1 Forge.

Tier-four and tier-five Ars armor

• Upgrade native Sorcerer, Arcanist and Battlemage armor to tiers four and five in the Ars Enchanting Apparatus. Each piece gains a fourth and then a fifth thread slot, with layouts specific to its armor set and equipment slot.
• Add real IV/V thread-slot levels. Numerical thread effects follow their native formulas and limits; existing mechanic unlock thresholds remain unchanged.
• Tier 3 → 4 requires Wilden Essence + Greater Experience Gem, one each, and 7,500 Source per piece.
• Tier 4 → 5 requires Nether Star Fragment + Dragon's Breath, one each, and 10,000 Source per piece.
• Craft one Wilden Tribute into four Wilden Essence, or one Nether Star into four Nether Star Fragments. The tier-five ingredient tag can be extended by datapacks; differently sized fragments from other mods are not automatically treated as equivalent.
• Keep installed threads, enchantments, wear and fusion data when upgrading. Both forward and reverse armor fusions follow the Ars source armor's progression. These recipes do not extend other addons' armor.
• Show the higher capacity in the native alteration table, equipment tooltips and Ars' JEI upgrade category. Native tiers one through three remain unchanged.

Reverse-fusion attributes

• Reverse armor fusion now defaults to using the Ars source armor's armor and armor toughness, while retaining the receiving item's identity, appearance and other native abilities. Set armor_fusion.reverse_uses_ars_defense = false to retain its original defenses.
• Also transfer the Ars source armor's native maximum Mana and Mana regeneration at its current upgrade tier. Installed thread bonuses are counted separately, once. Disable this independently with armor_fusion.reverse_transfers_ars_mana = false.
• These two configurable policies apply to existing reverse fusions as well; re-equip armor after changing them. Existing stored fusion and thread data is preserved.

Both platform releases and regression test sources compile successfully. Forge production reobfuscation, refmaps, resource and dependency checks passed. No client, server or GameTest was launched for these changes; in-game visuals and behavior remain subject to manual verification.