feat: wire stats into NPC spawner and game loop

Add stats and statModifiers components to spawnNPC, and run
statModifierSystem as the first system in the GameLoop update cycle.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/game/GameLoop.ts

@@ -5,6 +5,7 @@ import { needsDecaySystem } from '../systems/needsDecaySystem.js';
 import { npcBrainSystem } from '../systems/npcBrainSystem.js';
 import { movementSystem } from '../systems/movementSystem.js';
 import { socialSystem } from '../systems/socialSystem.js';
+import { statModifierSystem } from '../systems/statModifierSystem.js';
 import { spawnNPC } from './spawner.js';
 
 export class GameLoop {
@@ -61,6 +62,7 @@ export class GameLoop {
     this.tick++;
 
     // Run systems in order
+    statModifierSystem(this.world);
     needsDecaySystem(this.world);
     npcBrainSystem(this.world, this.map);
     socialSystem(this.world);

server/src/game/__tests__/spawner.test.ts

@@ -2,7 +2,7 @@ import { describe, it, expect } from 'vitest';
 import { World } from '../../ecs/World.js';
 import { GameMap } from '../../map/GameMap.js';
 import { spawnNPC } from '../spawner.js';
-import type { Position } from '@dflike/shared';
+import type { Position, Stats } from '@dflike/shared';
 
 describe('spawnNPC', () => {
   it('spawns at random position when no hint given', () => {
@@ -44,5 +44,18 @@ describe('spawnNPC', () => {
     expect(world.getComponent(entity, 'appearance')).toBeDefined();
     expect(world.getComponent(entity, 'name')).toBeDefined();
     expect(world.getComponent(entity, 'socialState')).toBeDefined();
+    expect(world.getComponent(entity, 'stats')).toBeDefined();
+    expect(world.getComponent(entity, 'statModifiers')).toBeDefined();
+  });
+
+  it('generates stats in 3-18 range', () => {
+    const world = new World();
+    const map = new GameMap();
+    const entity = spawnNPC(world, map);
+    const stats = world.getComponent<Stats>(entity, 'stats')!;
+    for (const key of Object.keys(stats) as (keyof Stats)[]) {
+      expect(stats[key]).toBeGreaterThanOrEqual(3);
+      expect(stats[key]).toBeLessThanOrEqual(18);
+    }
   });
 });

server/src/game/spawner.ts

@@ -2,7 +2,8 @@ import type { World } from '../ecs/World.js';
 import type { GameMap } from '../map/GameMap.js';
 import { generateRandomAppearance } from '../spawner/appearanceGenerator.js';
 import { generateName } from '../spawner/nameGenerator.js';
-import type { EntityId, Position, Needs, Movement, NPCBrain, Appearance, SocialState } from '@dflike/shared';
+import { generateStats } from '../spawner/statGenerator.js';
+import type { EntityId, Position, Needs, Movement, NPCBrain, Appearance, SocialState, Stats, StatModifiers } from '@dflike/shared';
 
 export function spawnNPC(world: World, map: GameMap, positionHint?: Position): EntityId {
   const entity = world.createEntity();
@@ -36,6 +37,8 @@ export function spawnNPC(world: World, map: GameMap, positionHint?: Position): E
     globalCooldown: 0,
     pairCooldowns: new Map(),
   });
+  world.addComponent<Stats>(entity, 'stats', generateStats());
+  world.addComponent<StatModifiers>(entity, 'statModifiers', { modifiers: [] });
 
   return entity;
 }