Version Update 1.1.39

Fix the bug where the Purification Potion could not be used, and optimize the position of item usage notifications.

Fix the error caused by a full equipment warehouse when graduating.

Reduce the price of Recommendation Letters for Tier 4 classes, and significantly lower the crafting difficulty of food that increases promotion success rates.

Refactor the Hero recruitment logic: remove the recruitment cooldown mechanism (continuous recruitment is now possible) and add an option to recruit directly to the dormitory.

Optimize the secondary attack logic for some Abyss Bosses.