fix: adapt shared page header to safe area

tests/shared-component-document-flow-contract.ps1

@@ -35,6 +35,10 @@ Assert-Match $header '(?s)\.header-logo,\s*\.header-notice-icon,\s*\.notice-dot\
 if ($header -match '(?s)\.notice-dot\s*\{[^}]*position\s*:') {
   throw 'PageHeader notice dot must use grid alignment instead of positioning'
 }
+Assert-Match $header '(?s)\.page-header-slot\s*\{[^}]*height:\s*calc\(104rpx \+ var\(--status-bar-height, 0px\)\);' 'PageHeader secondary slot must reserve status bar plus 104rpx content height'
+Assert-Match $header '(?s)\.page-header\s*\{[^}]*height:\s*calc\(104rpx \+ var\(--status-bar-height, 0px\)\);[^}]*padding-top:\s*var\(--status-bar-height, 0px\);' 'PageHeader secondary header must place its 104rpx content below the status bar'
+Assert-Match $header '(?s)\.page-header-slot--root\s*\{[^}]*height:\s*calc\(124rpx \+ var\(--status-bar-height, 0px\)\);' 'PageHeader root slot height must remain unchanged'
+Assert-Match $header '(?s)\.page-header--root\s*\{[^}]*height:\s*calc\(124rpx \+ var\(--status-bar-height, 0px\)\);' 'PageHeader root height must remain unchanged'
 
 if ($card -match '(?im)(?<![-\w])position\s*:') {
   throw 'GenealogyCard must use grid instead of positioning'

tests/shared-interaction-accessibility-contract.ps1

@@ -17,6 +17,16 @@ foreach ($pattern in @(
   if ($header -notmatch $pattern) { throw "PageHeader accessibility contract missing: $pattern" }
 }
 if (-not $header.Contains('fallbackUrl')) { throw 'PageHeader must expose a deep-link fallback route' }
+foreach ($token in @(
+  'customBack: { type: Boolean, default: false }',
+  'const emit = defineEmits(["brand", "notice", "action", "back"]);',
+  'if (props.customBack) {',
+  'emit("back");',
+  'uni.navigateBack();',
+  'uni.reLaunch({ url: props.fallbackUrl });'
+)) {
+  if (-not $header.Contains($token)) { throw "PageHeader back contract missing: $token" }
+}
 
 $dialog = Read-Utf8 'components/AppDialog.vue'
 foreach ($token in @('role="dialog"', 'aria-modal="true"', 'tabindex="-1"', '@keydown.esc.stop="cancel"', 'max-height: calc(100vh - 80rpx)', 'overflow-y: auto')) {