Phase 0: Project setup for agent-driven development

- Phaser 3 + bitECS 0.4 + TypeScript + Vite stack
- BootScene with title screen
- 6 cursor rules (project context, agent workflow, ECS, chemistry, Phaser, data)
- Vitest configured with happy-dom
- GDD, engine analysis, implementation plan, progress tracking

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/setup.test.ts

@@ -0,0 +1,38 @@
+import { describe, it, expect } from 'vitest';
+
+describe('Project Setup', () => {
+  it('should have working test infrastructure', () => {
+    expect(1 + 1).toBe(2);
+  });
+
+  // Phaser requires Canvas API — verified in browser via Playwright, not in unit tests
+  it.skip('should import Phaser types (browser-only)', async () => {
+    const Phaser = await import('phaser');
+    expect(Phaser).toBeDefined();
+  });
+
+  it('should import bitECS 0.4 API', async () => {
+    const { createWorld, addEntity, addComponent, query } = await import('bitecs');
+    expect(createWorld).toBeTypeOf('function');
+    expect(addEntity).toBeTypeOf('function');
+    expect(addComponent).toBeTypeOf('function');
+    expect(query).toBeTypeOf('function');
+  });
+
+  it('should create ECS world and entities', async () => {
+    const { createWorld, addEntity, addComponent, query } = await import('bitecs');
+
+    const Position = { x: [] as number[], y: [] as number[] };
+    const world = createWorld();
+    const eid = addEntity(world);
+
+    addComponent(world, eid, Position);
+    Position.x[eid] = 10;
+    Position.y[eid] = 20;
+
+    const entities = query(world, [Position]);
+    expect(entities).toContain(eid);
+    expect(Position.x[eid]).toBe(10);
+    expect(Position.y[eid]).toBe(20);
+  });
+});