修复: 生成质量机制根治——max_tokens截断检测+自动重试/icon白名单机械归一/空image剔除/金句引号伪元素治理/文本溢出扩高+重叠校正/图表y轴自适应防窄幅失真/stat缩字兜底/饼图图例流式排布/卡片icon字体锁定

tests/sanitize-contrast.test.ts

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+/* =====================================================================
+ * sanitize-contrast.test.ts — 对比度治理测试
+ * 保护对象：normSlides 内的 sanitizeContrast（深底小字 accent 降级、
+ * 透明/近背景色空装饰形状丢弃）
+ * ===================================================================== */
+import { describe, it, expect } from 'vitest'
+import { normSlides } from '../src/core/ai'
+import type { SlideElement } from '../src/core/types'
+
+/* ---------- 测试数据工厂 ---------- */
+function textEl(id: string, over: Partial<SlideElement> = {}): SlideElement {
+  return { id, type: 'text', x: 10, y: 30, w: 60, h: 20, content: '正文', style: { color: 'accent', fontSize: 20 }, ...over }
+}
+function shapeEl(id: string, over: Partial<SlideElement> = {}): SlideElement {
+  return { id, type: 'shape', x: 70, y: 80, w: 10, h: 10, content: '', style: { shapeType: 'circle' }, ...over }
+}
+function norm(background: string, elements: SlideElement[]): SlideElement[] {
+  return normSlides([{ background, elements }])[0].elements
+}
+
+describe('sanitizeContrast 深底小字 accent 降级', () => {
+  it('深底页 text color=accent fontSize=20 → 降为 muted', () => {
+    const els = norm('g-primary', [textEl('t')])
+    expect((els[0].style as any).color).toBe('muted')
+  })
+
+  it('深底页 stat 大数字 color=accent fontSize=72 → 保留 accent', () => {
+    const els = norm('g-deep', [textEl('st', { type: 'stat', content: '65%', style: { color: 'accent', fontSize: 72 } })])
+    expect((els[0].style as any).color).toBe('accent')
+  })
+
+  it('浅底页（bg）text color=accent → 不动', () => {
+    const els = norm('bg', [textEl('t')])
+    expect((els[0].style as any).color).toBe('accent')
+  })
+
+  it('深底页 text color=accent fontSize=32 → 不动（大字合法）', () => {
+    const els = norm('primary', [textEl('t', { style: { color: 'accent', fontSize: 32 } })])
+    expect((els[0].style as any).color).toBe('accent')
+  })
+
+  it('深底页 quote color=muted → 不动（已是 muted）', () => {
+    const els = norm('g-primary', [textEl('q', { type: 'quote', style: { color: 'muted', fontSize: 40 } })])
+    expect((els[0].style as any).color).toBe('muted')
+  })
+})
+
+describe('sanitizeContrast 空装饰形状丢弃', () => {
+  it('空装饰形状无 fill（透明）→ 丢弃', () => {
+    const els = norm('bg', [shapeEl('s1', { style: { shapeType: 'circle' } })])
+    expect(els.find(e => e.id === 's1')).toBeUndefined()
+  })
+
+  it('空装饰形状 fill=primary 放 g-primary 背景 → 丢弃（同色隐形）', () => {
+    const els = norm('g-primary', [shapeEl('s1', { style: { shapeType: 'circle', fill: 'primary' } })])
+    expect(els.find(e => e.id === 's1')).toBeUndefined()
+  })
+
+  it('空装饰形状 fill=accent 放 g-primary 背景 → 保留（不同色）', () => {
+    const els = norm('g-primary', [shapeEl('s1', { style: { shapeType: 'circle', fill: 'accent' } })])
+    expect(els.find(e => e.id === 's1')).toBeDefined()
+  })
+
+  it('带内容形状 fill 同背景色 → 保留', () => {
+    const els = norm('g-primary', [shapeEl('s1', { content: '标签', style: { shapeType: 'bubble', fill: 'primary' } })])
+    expect(els.find(e => e.id === 's1')).toBeDefined()
+  })
+})