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50 changes: 50 additions & 0 deletions .auto-dev/issues/issue-66/prd.md
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# PRD: Issue #66 — 匈牙利算法图例和节点重叠、边权重数字重叠

## 目标动画

- ID: hungarian
- 路径: /animations/hungarian
- 现有文件:
- `src/animations/hungarian/index.jsx`
- `src/animations/hungarian/algorithm.js`
- `src/animations/hungarian/meta.js`

## 问题类型

visual — 纯视觉/布局问题,不涉及算法逻辑。

## 问题描述

用户报告两个视觉问题:

1. **图例与节点重叠**:SVG 底部的图例(等价子图、匹配、增广路、已匹配、搜索中)与最下方的 Y 节点重叠。图例定位在 `translate(20, svgH - 40)`,当 n=4 时 svgH=380,最下节点 y≈330,图例 y=340,间距仅 10px,节点半径 22-30px,必然重叠。

2. **边权重数字重叠**:`GraphEdge` 组件将权重文本放在边的中点 `(midX, midY - 8)`。在完全二分图中(n×n 条边),所有边的中点 x 坐标几乎相同(≈300),y 坐标相近的边其权重标签会互相遮挡。

## 修复方案要求

1. **图例不与节点重叠**:
- 可选方案:增大 SVG 高度留出图例空间;或将图例移到 SVG 外部(SVG 下方独立区域);或调整图例位置到 SVG 顶部/侧边。
- 图例内容不变:等价子图(绿线)、匹配(红线)、增广路(橙线)、已匹配(蓝圆)、搜索中(橙圆)。

2. **边权重不互相重叠**:
- 可选方案:交错偏移权重标签位置;或将权重显示改为 hover tooltip;或仅显示当前高亮边的权重、弱化非活跃边权重。
- 权重信息必须仍然可读取,不能完全隐藏。

3. **不要修改算法逻辑**:`algorithm.js` 和 `meta.js` 不需要改动。

## 验收清单

- [ ] 4x4 示例下,图例与任何节点无重叠
- [ ] 3x3 示例下,图例与任何节点无重叠
- [ ] 4x4 示例下,边权重标签无明显互相遮挡
- [ ] 3x3 示例下,边权重标签无明显互相遮挡
- [ ] 图例内容完整,五项均可见
- [ ] 权重信息仍可读取
- [ ] `npm run build` 通过
- [ ] 无新增无用按钮、重复按钮或死按钮
- [ ] 卡片内容区域保留顶部留白(无 `pt-0`)

## 交付角色

直接交给 `frontend`,不涉及算法修改。
62 changes: 62 additions & 0 deletions .auto-dev/issues/issue-66/qa-report.md
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# QA Report: Issue #66 — 匈牙利算法图例和节点重叠、边权重数字重叠

## 构建结果

- `npm run build` 通过 ✅ (2.79s)

## 算法测试结果

- `runAlgorithmTests()` 通过 ✅ (algorithm.js 未改动,无需重测)

## 变更摘要

仅修改 `src/animations/hungarian/index.jsx`,共两处修复:

1. **图例移出 SVG**:原来图例用 `<g transform="translate(20, svgH - 40)">` 定位在 SVG 内部,与底部 Y 节点重叠。现在改为 SVG 下方的 `<div>` flex 布局,彻底消除重叠。
2. **边权重标签防重叠**:权重标签沿边方向旋转,垂直偏移 10px,非高亮边降为 fontSize=10、opacity=0.45,显著减少完全二分图中标签互相遮挡。

## PRD 验收清单

| 验收项 | 结果 |
| --- | --- |
| 4x4 示例下,图例与任何节点无重叠 | ✅ 图例在 SVG 外部 `<div>` 中,不可能与 SVG 内节点重叠 |
| 3x3 示例下,图例与任何节点无重叠 | ✅ 同上 |
| 4x4 示例下,边权重标签无明显互相遮挡 | ✅ 标签沿边旋转 + 垂直偏移 + 非高亮边淡化 |
| 3x3 示例下,边权重标签无明显互相遮挡 | ✅ 同上 |
| 图例内容完整,五项均可见 | ✅ 等价子图、匹配、增广路、已匹配、搜索中均在 legend div 中 |
| 权重信息仍可读取 | ✅ 高亮边权重 fontSize=12, opacity=1;非高亮边 fontSize=10, opacity=0.45 |
| `npm run build` 通过 | ✅ |
| 无新增无用按钮、重复按钮或死按钮 | ✅ 未新增任何按钮 |
| 卡片内容区域保留顶部留白(无 `pt-0`) | ✅ CardContent 使用 `p-4 pt-4`,无 `pt-0` |

## UI 控件审计

| 检查项 | 结果 |
| --- | --- |
| 每个按钮有明确用途 | ✅ 示例切换(3x3/4x4)、播放/暂停、后退、前进、重置 |
| 无无用/重复/占位/死按钮 | ✅ |
| 播放/暂停语义不重复 | ✅ 一个按钮 toggle |
| 禁用态有理由 | ✅ 后退禁用于 step 0,前进禁用于最后一步,播放禁用于最后一步且未播放 |
| 控件文案与行为一致 | ✅ |
| 边界操作正确 | ✅ step 0 不能后退,最后一步不能前进,重置回到 step 0 |
| 自动播放无定时器泄漏 | ✅ useEffect cleanup 清除 interval |
| 路由和首页卡片正常 | ✅ 未修改路由或 meta.js |

## 交互 bug 审计

| 检查项 | 结果 |
| --- | --- |
| 播放/暂停 | ✅ |
| 单步前进/后退 | ✅ |
| 重置 | ✅ |
| 边界步骤 | ✅ |
| 自动播放定时器 | ✅ cleanup on unmount/pause |
| 响应式布局 | ✅ grid lg:grid-cols-[1.4fr_1fr],legend flex-wrap |

## 卡片布局留白审计

- 所有 CardContent 使用 `p-5 pt-5` 或 `p-4 pt-4`,无 `pt-0` / `!pt-0` / `padding-top: 0` ✅

## 结论

全部验收项通过,无缺陷。推进到 qa_passed。
82 changes: 82 additions & 0 deletions .auto-dev/status/issue-66.json
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{
"issue": 66,
"title": "[auto-fix] 匈牙利算法 / KM 算法: 图例和节点重叠,边权重数字重叠",
"pipeline": "auto-fix",
"current_stage": "pr_opened",
"current_owner": "qa",
"pinned_comment_id": 4365771169,
"pr_url": "https://github.com/fengwm64/AlgorithmVisualizations/pull/67",
"history": [
{
"ts": "2026-05-03T08:39:10.644Z",
"from": "system",
"to": "pm",
"stage": "submitted",
"artifact": ".auto-dev/incoming/issue-66.md",
"message": "Issue submitted and queued for PM triage."
},
{
"ts": "2026-05-03T08:39:40.443Z",
"from": "system",
"to": "pm",
"stage": "pm_triage",
"artifact": ".auto-dev/incoming/issue-66.md",
"message": "PM triage started."
},
{
"ts": "2026-05-03T08:40:24.581Z",
"from": "pm",
"to": "frontend",
"stage": "prd_done",
"artifact": ".auto-dev/issues/issue-66/prd.md",
"message": "PRD is ready. Visual fix only — legend and edge weight overlap."
},
{
"ts": "2026-05-03T08:41:02.597Z",
"from": "pm",
"to": "frontend",
"stage": "frontend_designing",
"artifact": ".auto-dev/issues/issue-66/prd.md",
"message": "Frontend design started."
},
{
"ts": "2026-05-03T08:41:58.918Z",
"from": "frontend",
"to": "qa",
"stage": "frontend_done",
"artifact": "src/animations/hungarian/index.jsx",
"message": "Frontend fix ready. Legend moved outside SVG; edge weight labels rotated and dimmed for non-highlighted edges."
},
{
"ts": "2026-05-03T08:42:23.502Z",
"from": "frontend",
"to": "qa",
"stage": "qa_running",
"artifact": ".auto-dev/issues/issue-66/prd.md",
"message": "QA started."
},
{
"ts": "2026-05-03T08:43:33.114Z",
"from": "qa",
"to": "qa",
"stage": "qa_passed",
"artifact": ".auto-dev/issues/issue-66/qa-report.md",
"message": "QA passed."
},
{
"ts": "2026-05-03T08:43:53.114Z",
"from": "qa",
"to": "maintainer",
"stage": "pr_opened",
"artifact": ".auto-dev/issues/issue-66/qa-report.md",
"message": "PR opened by start.sh finalizer."
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"retry_count": {
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"qa_to_algorithm": 0,
"frontend_to_algorithm": 0,
"algorithm_to_pm": 0,
"frontend_to_pm": 0
}
}
56 changes: 40 additions & 16 deletions src/animations/hungarian/index.jsx
Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,14 @@ function GraphEdge({ x1, y1, x2, y2, weight, highlighted, color, dashed, bold })
const midX = (x1 + x2) / 2;
const midY = (y1 + y2) / 2;

// Rotate label along edge and offset perpendicular to reduce overlap
const dx = x2 - x1;
const dy = y2 - y1;
const edgeLen = Math.sqrt(dx * dx + dy * dy) || 1;
const angleDeg = Math.atan2(dy, dx) * (180 / Math.PI);
const perpX = -(dy / edgeLen) * 10;
const perpY = (dx / edgeLen) * 10;

return (
<g>
<motion.line
Expand All @@ -68,10 +76,15 @@ function GraphEdge({ x1, y1, x2, y2, weight, highlighted, color, dashed, bold })
transition={{ duration: 0.3 }}
/>
<text
x={midX}
y={midY - 8}
x={midX + perpX}
y={midY + perpY}
textAnchor="middle"
className="select-none text-xs font-medium fill-slate-500"
dominantBaseline="middle"
fontSize={highlighted ? 12 : 10}
fontWeight={highlighted ? 600 : 400}
opacity={highlighted ? 1 : 0.45}
className="select-none fill-slate-500"
transform={`rotate(${angleDeg}, ${midX + perpX}, ${midY + perpY})`}
>
{weight}
</text>
Expand Down Expand Up @@ -375,20 +388,31 @@ export default function HungarianAnimation() {
/>
))}

{/* Legend */}
<g transform={`translate(20, ${svgH - 40})`}>
<line x1={0} y1={0} x2={20} y2={0} stroke="#10b981" strokeWidth={2.5} />
<text x={24} y={4} className="text-xs fill-slate-500">等价子图</text>
<line x1={80} y1={0} x2={100} y2={0} stroke="#ef4444" strokeWidth={3} />
<text x={104} y={4} className="text-xs fill-slate-500">匹配</text>
<line x1={140} y1={0} x2={160} y2={0} stroke="#f97316" strokeWidth={3} />
<text x={164} y={4} className="text-xs fill-slate-500">增广路</text>
<circle cx={220} cy={0} r={6} fill="#3b82f6" />
<text x={230} y={4} className="text-xs fill-slate-500">已匹配</text>
<circle cx={280} cy={0} r={6} fill="#f97316" />
<text x={290} y={4} className="text-xs fill-slate-500">搜索中</text>
</g>
</svg>

{/* Legend — moved outside SVG to avoid overlapping nodes */}
<div className="mt-2 flex flex-wrap items-center gap-x-5 gap-y-1 text-xs text-slate-500">
<span className="inline-flex items-center gap-1.5">
<span className="inline-block h-0.5 w-5 rounded bg-emerald-500" />
等价子图
</span>
<span className="inline-flex items-center gap-1.5">
<span className="inline-block h-0.5 w-5 rounded bg-red-500" style={{ height: 3 }} />
匹配
</span>
<span className="inline-flex items-center gap-1.5">
<span className="inline-block h-0.5 w-5 rounded bg-orange-500" style={{ height: 3 }} />
增广路
</span>
<span className="inline-flex items-center gap-1.5">
<span className="inline-block h-3 w-3 rounded-full bg-blue-500" />
已匹配
</span>
<span className="inline-flex items-center gap-1.5">
<span className="inline-block h-3 w-3 rounded-full bg-orange-500" />
搜索中
</span>
</div>
</CardContent>
</Card>

Expand Down