feat(api): re-anchor HP regeneration before an equipment-driven max-HP change

apps/api/src/equipment/equipment.service.ts

@@ -1,6 +1,7 @@
 import { Injectable } from '@nestjs/common';
 import { DataSource } from 'typeorm';
 import { CharacterStatsService } from '../characters/character-stats.service';
+import { CharacterVitalsService } from '../characters/character-vitals.service';
 import { Character } from '../characters/entities/character.entity';
 import { CombatStatus } from '../combat/combat-status.enum';
 import { Combat } from '../combat/entities/combat.entity';
@@ -48,6 +49,7 @@ export class EquipmentService {
   constructor(
     private readonly dataSource: DataSource,
     private readonly characterStats: CharacterStatsService,
+    private readonly characterVitals: CharacterVitalsService,
   ) {}
 
   async getEquipment(characterId: string): Promise<EquipmentResponseDto> {
@@ -106,6 +108,10 @@ export class EquipmentService {
         throw itemLevelRequirementNotMet();
       }
 
+      const statsBeforeChange = await this.characterStats.calculate(character, manager);
+      this.characterVitals.settle(character, statsBeforeChange.maxHp);
+      await characters.save(character);
+
       const existing = await equipmentRepo.findOne({
         where: { characterId, slot: definition.equipmentSlot },
         lock: { mode: 'pessimistic_write' },