M0-M11 狩夜人笔记初始实现：11里程碑+86测试

tests/unit/effect-engine.test.ts

@@ -0,0 +1,35 @@
+/** @vitest-environment jsdom */
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { EffectEngine } from '../../apps/desktop/src/renderer/features/effects/effect-engine';
+
+// stub requestAnimationFrame
+beforeEach(() => {
+  globalThis.requestAnimationFrame = ((cb: FrameRequestCallback) => { return 0 as any; }) as any;
+  globalThis.cancelAnimationFrame = (() => {}) as any;
+});
+
+describe('M6 EffectEngine 配置与降级 (FR-A11)', () => {
+  it('setType/setColor 改变状态', () => {
+    const e = new EffectEngine();
+    e.setType('particle'); e.setColor('#ff0000');
+    e.disable();
+    // disable 后 type 为 off
+    expect(e.isActive()).toBe(false);
+  });
+
+  it('attach 到 canvas 不抛错', () => {
+    const canvas = document.createElement('canvas');
+    document.body.appendChild(canvas);
+    const e = new EffectEngine();
+    expect(() => e.attach(canvas)).not.toThrow();
+    e.detach();
+  });
+
+  it('detach 后 isActive 为 false', () => {
+    const canvas = document.createElement('canvas');
+    const e = new EffectEngine();
+    e.attach(canvas);
+    e.detach();
+    expect(e.isActive()).toBe(false);
+  });
+});