Review changes batch 6 of 6
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# AppLoading 必要加载动效实施计划
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> **执行要求：** 使用 `superpowers:executing-plans` 在当前会话内逐步执行。用户明确禁止多代理、worktree、`git add`、commit、push、reset 和 checkout。
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**目标：** 修复 G01 在 `prefers-reduced-motion: reduce` 下加载态完全静止的问题，使印牌和如意结保留清晰的透明度呼吸，同时不产生缩放、旋转或位移。
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**架构：** 继续由 `components/AppLoading.vue` 单一维护加载动效，不在 G01 复制样式。正常模式保持现有动画；减少动态效果模式改用独立的透明度关键帧，并强制 `transform: none`。测试先锁定旧行为必须失败，再验证静态契约和当前 Chrome 运行时证据。
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**技术栈：** Vue 3、uni-app、SCSS、PowerShell 契约测试、Chrome DevTools Protocol、Node.js。
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## 全局约束
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- 只修改 G01 加载态直接依赖的公共 `AppLoading`、聚焦测试和当轮内部证据。
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- 不改变 `variant`、`text`、`description` 组件契约。
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- 不改变 G01 状态逻辑、布局、背景、文案、标题栏或底部导航。
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- 不新增图片、CSS 图形、JavaScript 定时器或业务接口。
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- `prefers-reduced-motion: reduce` 下只允许透明度变化，`transform` 必须为 `none`。
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- H5 截图只是内部候选；Android/HBuilderX 仍未验证。
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- 不执行任何 Git 写操作。
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---
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### Task 1：修复并验证减少动态效果模式的必要加载反馈
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**文件：**
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- 修改：`tests/app-loading-contract.ps1`
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- 修改：`components/AppLoading.vue`
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- 验证：`tests/g01-loading-state-contract.ps1`
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- 验证：`tests/g-series-app-loading-contract.ps1`
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- 验证：`tests/module-app-loading-contract.ps1`
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- 内部证据：`docs/design/screens/runtime/2026-07-19/g01-approval/03-loading-essential-motion-412x915.png`
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**接口：**
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- 消费：`AppLoading` 现有 `variant`、`text`、`description` 属性。
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- 产出：正常模式继续使用 `app-loading-seal-breathe`／`app-loading-knot-breathe`；减少动态效果模式使用 `app-loading-seal-essential-pulse`／`app-loading-knot-essential-pulse`。
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- 不增加新的组件属性、事件或页面状态。
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- [ ] **Step 1：先补充会失败的公共契约**
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在 `tests/app-loading-contract.ps1` 的现有动画断言之后加入：
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```powershell
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Assert-Match -Content $component -Pattern '@keyframes\s+app-loading-seal-essential-pulse' -Message 'Reduced-motion AppLoading must retain an essential seal opacity pulse'
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Assert-Match -Content $component -Pattern '@keyframes\s+app-loading-knot-essential-pulse' -Message 'Reduced-motion AppLoading must retain an essential knot opacity pulse'
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Assert-Match -Content $component -Pattern '(?s)@media\s*\(prefers-reduced-motion:\s*reduce\).*?\.app-loading__seal\s*\{[^}]*animation:\s*app-loading-seal-essential-pulse\s+1\.2s\s+ease-in-out\s+infinite;[^}]*transform:\s*none;' -Message 'Reduced-motion seal must pulse opacity without transform motion'
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Assert-Match -Content $component -Pattern '(?s)@media\s*\(prefers-reduced-motion:\s*reduce\).*?\.app-loading__knot\s*\{[^}]*animation:\s*app-loading-knot-essential-pulse\s+1\.2s\s+ease-in-out\s+\.2s\s+infinite;[^}]*transform:\s*none;' -Message 'Reduced-motion knot must pulse opacity without transform motion'
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if ($component -match '(?s)@media\s*\(prefers-reduced-motion:\s*reduce\).*?animation:\s*none') {
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throw 'Reduced-motion AppLoading must not become completely static'
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}
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```
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- [ ] **Step 2：运行聚焦契约并确认 RED**
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运行：
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```powershell
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powershell.exe -NoProfile -ExecutionPolicy Bypass -File tests/app-loading-contract.ps1
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```
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预期：退出码非 0，错误首先指向缺少 `app-loading-seal-essential-pulse`，证明测试捕获的是当前完全静止行为，而不是语法或路径错误。
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- [ ] **Step 3：实现最小降动效透明度脉冲**
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在 `components/AppLoading.vue` 中保留现有正常模式关键帧，并把当前媒体查询替换为：
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```scss
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@keyframes app-loading-seal-essential-pulse {
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0%, 100% { opacity: .58; }
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50% { opacity: 1; }
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}
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@keyframes app-loading-knot-essential-pulse {
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0%, 100% { opacity: .28; }
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50% { opacity: .86; }
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}
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@media (prefers-reduced-motion: reduce) {
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.app-loading__seal {
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animation: app-loading-seal-essential-pulse 1.2s ease-in-out infinite;
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transform: none;
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}
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.app-loading__knot {
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animation: app-loading-knot-essential-pulse 1.2s ease-in-out .2s infinite;
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transform: none;
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}
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}
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```
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不得修改模板、属性、尺寸、文案或正常模式关键帧。
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- [ ] **Step 4：运行聚焦契约并确认 GREEN**
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运行：
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```powershell
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powershell.exe -NoProfile -ExecutionPolicy Bypass -File tests/app-loading-contract.ps1
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powershell.exe -NoProfile -ExecutionPolicy Bypass -File tests/g01-loading-state-contract.ps1
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```
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预期：分别输出 `APP-LOADING-CONTRACT PASS` 和 `G01-LOADING-STATE-CONTRACT PASS`，退出码均为 0。
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- [ ] **Step 5：在当前唯一 Chrome 标签页验证真实动画**
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保持 G01 `state=loading` 和 412×915 视口。通过 9222 CDP 在同一次检查中读取：
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```js
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const seal = document.querySelector('.app-loading__seal')
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const knot = document.querySelector('.app-loading__knot')
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const sealStyle = getComputedStyle(seal)
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const knotStyle = getComputedStyle(knot)
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({
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reduced: matchMedia('(prefers-reduced-motion: reduce)').matches,
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sealAnimation: sealStyle.animationName,
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sealTransform: sealStyle.transform,
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sealOpacity: sealStyle.opacity,
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sealAnimations: seal.getAnimations().length,
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knotAnimation: knotStyle.animationName,
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knotTransform: knotStyle.transform,
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knotOpacity: knotStyle.opacity,
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knotAnimations: knot.getAnimations().length
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})
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```
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等待约 420ms 后再次读取。预期：
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- `reduced` 为 `true`；
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- 两个 `animationName` 分别以新的 essential pulse 名称开头；Vue scoped CSS 可在运行时追加哈希后缀；
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- 两个 `getAnimations().length` 均大于 0；
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- 两次读取的透明度不同；
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- 两个 `transform` 均为 `none`；
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- 页面仍为 G01 加载态。
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- [ ] **Step 6：捕获并人工检查当前候选帧**
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使用当前唯一标签页保存：
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```text
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docs/design/screens/runtime/2026-07-19/g01-approval/03-loading-essential-motion-412x915.png
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```
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人工检查：标题栏、背景、印牌、如意结、两行文案和底部导航均完整；没有列表、失败态或原生 Loading 串入。静态截图不作为动画运行证明，动画结论以 Step 5 的多时点数据为准。
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- [ ] **Step 7：运行受影响合同与空白检查**
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运行：
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```powershell
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powershell.exe -NoProfile -ExecutionPolicy Bypass -File tests/g-series-app-loading-contract.ps1
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powershell.exe -NoProfile -ExecutionPolicy Bypass -File tests/module-app-loading-contract.ps1
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git diff --check -- components/AppLoading.vue tests/app-loading-contract.ps1 docs/superpowers/specs/2026-07-19-app-loading-essential-motion-design.md docs/superpowers/plans/2026-07-19-app-loading-essential-motion.md
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```
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预期：两个合同均输出各自的 `PASS`，`git diff --check` 退出码为 0。不得把 Android/HBuilderX 写成已验证。
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- [ ] **Step 8：回到同一加载态等待用户复核**
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保持浏览器停留在修正后的 G01 加载态，不自动切换到失败态。只有用户明确说加载态“通过”后，才继续 G01 下一状态；在此之前 G01 保持 `[!]`。
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