feat(sprint4): achievements, community goals, hall of fame, profile

4 modules: achievement (15 succès, 5 catégories, 3 paliers), community
(objectifs collectifs + boosts globaux), halloffame (classement mensuel),
profile (titre actif + badges + % progression).

Event-driven: combat/forge/craft émettent des events via @nestjs/event-emitter.
Character entity: +activeTitle, +totalGoldEarned.
Seeds: 15 achievements + 3 community goals.

src/forge/forge.service.ts

@@ -1,6 +1,7 @@
 import { Injectable, BadRequestException, NotFoundException } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { Repository } from 'typeorm';
+import { EventEmitter2 } from '@nestjs/event-emitter';
 import { CharacterItem } from '../item/character-item.entity';
 import { Character } from '../character/entities/character.entity';
 import { User } from '../user/user.entity';
@@ -24,6 +25,7 @@ export class ForgeService {
     private readonly charItemRepository: Repository<CharacterItem>,
     @InjectRepository(Character)
     private readonly characterRepository: Repository<Character>,
+    private readonly eventEmitter: EventEmitter2,
   ) {}
 
   async upgradeItem(charItemId: string, user: User) {
@@ -46,6 +48,18 @@ export class ForgeService {
       charItem.forgeLevel = targetLevel;
       await this.charItemRepository.save(charItem);
 
+      // Emit achievement & community events
+      this.eventEmitter.emit('achievement.check', {
+        characterId: char.id,
+        type: 'forge_upgrades',
+        increment: 1,
+      });
+      this.eventEmitter.emit('community.contribute', {
+        characterId: char.id,
+        type: 'total_forge_upgrades',
+        increment: 1,
+      });
+
       const statLabel = charItem.item.type === 'weapon'
         ? `+${FORGE_BONUS_PER_LEVEL} ATK`
         : `+${FORGE_BONUS_PER_LEVEL} DEF`;