feat: audit Phase 1 — P0/P1 quick wins

- Fix vitalité: HP initial = 100 + (vitalité-1)×10
- Arme de départ: Bâton de Roseau équipé à la création
- Rebalance forge: niv3 200, niv4 400, niv5 700 (−30%)
- Confirmation avant vente d'item (confirm dialog)
- Fix forge costs dupliqués (shop sellback + inventaire)

src/character/character.service.ts

@@ -11,6 +11,8 @@ import { LevelThreshold } from './entities/level-threshold.entity';
 import { CreateCharacterDto } from './dto/create-character.dto';
 import { DistributeStatsDto } from './dto/distribute-stats.dto';
 import { User } from '../user/user.entity';
+import { Item } from '../item/item.entity';
+import { CharacterItem } from '../item/character-item.entity';
 import { xpRequiredForLevel } from '../combat/combat.engine';
 
 const STAT_POOL = 10; // 5 stats × 1 base + 5 points à distribuer
@@ -53,6 +55,7 @@ export class CharacterService {
       throw new ConflictException('Ce joueur possède déjà un personnage');
     }
 
+    const baseHp = 100 + (dto.vitalite - 1) * 10; // vitalité 1 = 100 HP, chaque point = +10
     const character = this.characterRepository.create({
       userId: user.id,
       name: dto.name,
@@ -61,12 +64,29 @@ export class CharacterService {
       intelligence: dto.intelligence,
       chance: dto.chance,
       vitalite: dto.vitalite,
+      hpMax: baseHp,
+      hpCurrent: baseHp,
       enduranceSaved: 100,
       lastEnduranceTs: new Date(),
       enduranceMax: 100,
     });
 
     const saved = await this.characterRepository.save(character);
+
+    // Arme de départ — Bâton de Roseau équipé automatiquement
+    const starterWeapon = await this.dataSource.getRepository(Item)
+      .findOne({ where: { name: 'Bâton de Roseau' } });
+    if (starterWeapon) {
+      await this.dataSource.getRepository(CharacterItem).save(
+        this.dataSource.getRepository(CharacterItem).create({
+          characterId: saved.id,
+          itemId: starterWeapon.id,
+          forgeLevel: 0,
+          equipped: true,
+        }),
+      );
+    }
+
     return {
       ...saved,
       enduranceCurrent: this.calculateEndurance(saved),

src/forge/forge.service.ts

@@ -13,9 +13,9 @@ const FORGE_BONUS_PER_LEVEL = 2;
 const FORGE_GOLD_COST: Record<number, number> = {
   1: 50,
   2: 100,
-  3: 250,
-  4: 500,
-  5: 1000,
+  3: 200,
+  4: 400,
+  5: 700,
 };
 
 const FORGE_ENDURANCE_COST = 10;

src/shop/shop.service.ts

@@ -154,7 +154,7 @@ export class ShopService {
       if (charItem.equipped) throw new BadRequestException('Déséquipez l\'item avant de le vendre');
 
       // Prix de vente = base + investissement forge (coûts cumulés * 50%)
-      const FORGE_GOLD_COST: Record<number, number> = { 1: 50, 2: 100, 3: 250, 4: 500, 5: 1000 };
+      const FORGE_GOLD_COST: Record<number, number> = { 1: 50, 2: 100, 3: 200, 4: 400, 5: 700 };
       let forgeInvestment = 0;
       for (let i = 1; i <= charItem.forgeLevel; i++) {
         forgeInvestment += FORGE_GOLD_COST[i] ?? 0;