LevelZ Refabricated

Fixes

Fix 1 — XP progression formula Fixed incorrect level-up loop in ServerPlayerEntityMixin.java where the XP cost was read before and after addExperienceLevels(1) in the wrong order, causing overflow XP to be scaled incorrectly. This made levels cost significantly less than configured, allowing players to level up much faster than intended.

Fix 2 — Server config not applied on client The client always used its own local ConfigInit.CONFIG to calculate and display XP requirements, completely ignoring the server's configuration. Added ConfigSyncPacket which is sent to the client on join, overwriting the local XP-related config values (xpBaseCost, xpCostMultiplicator, xpExponent, xpMaxCost, overallMaxLevel) with the server's values.