提取认证页共享自适应骨架

docs/superpowers/plans/2026-07-21-auth-pages-adaptive-migration.md

@@ -28,7 +28,7 @@
 - Test: `tests/auth-page-shell-contract.ps1`
 
 **Interfaces:**
-- Produces: `AuthPageShell` 的单一职责合同，以及 A01/A04/A05/A06 禁止旧画布的合同
+- Produces: `AuthPageShell` 的单一职责合同，以及首个消费者 A01 禁止旧画布的合同；其余页面由各自任务的合同接管
 
 - [ ] **Step 1: 写入失败合同**
 
@@ -50,7 +50,7 @@ foreach ($required in @(
   'min-height: var(--app-viewport-height);'
 )) { Assert-Contains $shell $required "AuthPageShell is missing: $required" }
 
-foreach ($pageName in @('a01-entry.vue','a04-register.vue','a05-reset-password.vue','a06-auth-status.vue')) {
+foreach ($pageName in @('a01-entry.vue')) {
   $page = Get-Content -LiteralPath (Join-Path $root "pages/auth/$pageName") -Raw -Encoding utf8
   Assert-Contains $page '<AuthPageShell' "$pageName must consume AuthPageShell"
   foreach ($forbidden in @('class="page-canvas"','class="page-backdrop"','mode="scaleToFill"','1665rpx')) {