[Bug] There are some bugs in the healing system

[SummerJustNice]

Did you look for other closed issues that have the same problem?

Yes. 是的

Describe the bug

The amount of healing is not right. Duplicated healing occured when battling. Many healers have these bugs.
治疗量不正确。战斗时出现了多次重复治疗。很多奶妈都有这些bug。

Which branch did you use?

Grasscutter version: 1.3.1-dev
Git Hash: 5529674
Screenshots

Additional context

C6 Kokomi should have healing bonus for low HP characters.
Considering now the healing abilities are almost hardcoded, is it acceptable to be more "hard" - writing individual healing function for every healer? If it is acceptable, maybe I can help to debug.
六命心海对低血量人物应有治疗加成
考虑到现在的治疗技能基本上是硬编码的，更”硬“一点能否接受呢？也即对每个奶妈独立写治疗函数。如果这可以接受，我可以帮忙debug。

[flymoonvip]

Healing with food does not reduce the amount in the backpack
还有食物治疗并不减少背包内的数量

[shin1804]

Did ur shinobu can heal other charater? Mine only heal when use E first times then no more heal.

[KingRainbow44]

resolved in #2166