修改完成

tests/t01-tree-state-contract.ps1

@@ -14,6 +14,14 @@ function Assert-NoCssSurface {
   }
 }
 
+function Assert-NoPosition {
+  param([string]$Content, [string]$Selector)
+  $escaped = [regex]::Escape($Selector)
+  if ($Content -match "(?s)$escaped\s*\{[^}]*\bposition\s*:") {
+    throw "T01 ordinary layout selector must stay in document flow: $Selector"
+  }
+}
+
 $root = Split-Path -Parent $PSScriptRoot
 $pagePath = Join-Path $root 'pages/tree/t01-tree-overview.vue'
 $t02Path = Join-Path $root 'pages/tree/t02-tree-states.vue'
@@ -34,13 +42,16 @@ foreach ($required in @(
   'tree-state--error',
   'tree-canvas--state',
   'lineage-connector',
-  'const generationRows = [',
+  'const generationRows = computed(',
   'v-for="row in generationRows"',
-  ':style="generationRowStyle(row)"',
+  ':style="generationBandStyle(row)"',
   'class="tree-stage"',
+  'tree-stage--lineage',
   'class="generation-rail"',
   'tree-scroll--lineage',
-  'const generationRowStyle = (row)',
+  ':style="nodeGridStyle(member)"',
+  'const nodeGridStyle = (member)',
+  'class="member-node__copy"',
   't01-member-node-standard.png',
   't01-member-node-selected.png',
   't01-state-panel.png',
@@ -67,4 +78,41 @@ foreach ($className in @('tree-canvas', 'member-node', 'member-sheet', 'tree-sta
   Assert-NoCssSurface $page $className
 }
 
+foreach ($selector in @('.generation-rail', '.generation-band', '.member-node')) {
+  Assert-NoPosition $page $selector
+}
+
+if ($page -match '(?s)\.node-name,\s*\.node-relation,\s*\.node-years\s*\{[^}]*\bposition\s*:') {
+  throw 'T01 member node text must stay in document flow'
+}
+if ($page -notmatch '(?s)\.tree-page\s*\{[^}]*display:\s*grid;[^}]*grid-template-rows:\s*auto auto minmax\(0, 1fr\);') {
+  throw 'T01 page content must own a grid stacking context above the fixed module background'
+}
+
+foreach ($obsolete in @('const nodeStyle = (member)', 'const generationRowStyle = (row)', 'left: `${member.x}rpx`', 'top: `${member.y}rpx`')) {
+  if ($page -match [regex]::Escape($obsolete)) { throw "T01 obsolete positioned layout remains: $obsolete" }
+}
+
+foreach ($required in @(
+  'const treeMetrics = computed(',
+  ':style="treeMetricsStyle"',
+  ':style="generationBandStyle(row)"',
+  'overflow-y: auto;'
+)) { Assert-Contains $page $required "T01 data-driven tree boundary missing: $required" }
+if ($page -match '<scroll-view\s+class="tree-stage"') {
+  throw 'T01 outer vertical tree owner must preserve the stage grid instead of wrapping its grid children'
+}
+
+foreach ($fixedCapacity in @(
+  'grid-template-columns: repeat(180, 5rpx)',
+  'grid-template-rows: repeat(180, 5rpx)',
+  'width: 900rpx',
+  'height: 900rpx',
+  'grid-template-rows: 47rpx 58rpx 157rpx 58rpx 242rpx 58rpx 1fr'
+)) {
+  if ($page -match [regex]::Escape($fixedCapacity)) {
+    throw "T01 must derive tree capacity from member data: $fixedCapacity"
+  }
+}
+
 Write-Output 'T01-TREE-STATE-CONTRACT PASS'