feat: consolidate legacy parity migration baseline

tests/Web/cut-keyboard-app-integration.test.cjs

@@ -77,20 +77,20 @@ test("cut focus is roving and scrolls only for keyboard navigation", () => {
   assert.equal(rows[1].scrollCount, 1);
 });
 
-test("cut key intent preserves Home End bubbling and honors the mutation gate", () => {
+test("cut key intent preserves Home End bubbling and stable PROGRAM selection", () => {
   const start = app.indexOf("function createCutElement");
   const end = app.indexOf("function renderCuts", start);
   const factory = app.slice(start, end);
   assert.match(factory, /element\.addEventListener\("keydown"/);
   assert.match(factory, /event\.preventDefault\(\)/);
-  assert.match(factory, /if \(playlistMutationLocked\) return/);
+  assert.match(factory, /if \(!cutSelectionEnabled\) return/);
   assert.match(factory, /send\("cut-key-down", \{/);
   assert.match(factory, /control: event\.ctrlKey/);
   assert.match(factory, /shift: event\.shiftKey/);
   assert.doesNotMatch(factory, /stopPropagation/);
 
   assert.match(nativeWindow, /LegacyCutKeyDownIntent key => _controller\.CutKeyDown/);
-  assert.match(nativePlayout, /LegacyCutKeyDownIntent or/);
+  assert.doesNotMatch(nativePlayout, /LegacyCutKeyDownIntent or/);
 });
 
 test("rendered cut rows expose authoritative focus without replacing DOM rows", () => {

tests/Web/legacy-theme-parity-app-integration.test.cjs

@@ -35,7 +35,10 @@ test("UC4 renders original headings and action order in the Web vertical workspa
   assert.doesNotMatch(app, /theme-nxt-session/u);
 });
 
-test("UC4 selection is immediate and selection receipts preserve the result DOM", () => {
+test("UC4 defers a single click for double-click activation and preserves the result DOM", () => {
+  const doubleClick = section(
+    "categoryTree.addEventListener(\"dblclick\"",
+    "categoryTree.addEventListener(\"click\"");
   const click = section(
     "categoryTree.addEventListener(\"click\"",
     "categoryTree.addEventListener(\"change\"");
@@ -50,8 +53,9 @@ test("UC4 selection is immediate and selection receipts preserve the result DOM"
   const updater = section("function updateThemeWorkspace(workspace, theme)", "function renderTheme(state)");
 
   assert.match(themeClick,
-    /send\("select-theme", \{ resultId: themeResult\.dataset\.themeResultId \}\)/u);
-  assert.doesNotMatch(themeClick, /setTimeout|themeResultClickTimer/u);
+    /clearDelayedClick\(themeResultClickTimer\);[\s\S]*const resultId = themeResult\.dataset\.themeResultId;[\s\S]*themeResultClickTimer = window\.setTimeout\(function \(\) \{[\s\S]*themeResultClickTimer = null;[\s\S]*send\("select-theme", \{ resultId: resultId \}\);[\s\S]*\}, 250\);/u);
+  assert.match(doubleClick,
+    /clearDelayedClick\(themeResultClickTimer\);[\s\S]*themeResultClickTimer = null;[\s\S]*send\("activate-theme-result", \{/u);
   assert.match(render,
     /existingWorkspace && structureKey === themeRenderStructureKey[\s\S]*updateThemeWorkspace\(existingWorkspace, theme\);[\s\S]*return;/u);
   assert.doesNotMatch(updater, /categoryTree\.replaceChildren|results\.replaceChildren/u);

tests/Web/playout-page-preflight-integration.test.cjs

@@ -0,0 +1,28 @@
+const test = require("node:test");
+const assert = require("node:assert/strict");
+const fs = require("node:fs");
+const path = require("node:path");
+
+const source = fs.readFileSync(path.join(
+  __dirname,
+  "..",
+  "..",
+  "src",
+  "MBN_STOCK_WEBVIEW.LegacyParityApp",
+  "MainWindow.Playout.cs"), "utf8");
+
+test("first PREPARE and TAKE IN freeze fresh PageN plans for every paged row", () => {
+  assert.ok((source.match(/CreateFreshPagedPlayoutRequestAsync\(/g) || []).length >= 3);
+  assert.match(source,
+    /Where\(static entry => entry\.PageNavigation\?\.PageSize\.HasValue == true\)/u);
+  assert.match(source, /PreflightPagePlansAsync\(/u);
+  assert.match(source,
+    /ReflectSuccessfulPlayout\([\s\S]*plan\.EntryId,[\s\S]*pageIndexZeroBased: 0,[\s\S]*plan\.PageCount,[\s\S]*synchronizeOperatorSelection: false\)/u);
+});
+
+test("fresh PageN wiring rejects empty or mismatched plans before vendor dispatch", () => {
+  assert.match(source, /plans\.Count != pagedEntries\.Length/u);
+  assert.match(source, /plan\.PageSize != \(int\)expectedPageSize/u);
+  assert.match(source, /plan\.PageCount is < 1 or > ScenePaging\.MaximumPageCount/u);
+  assert.match(source, /workflow\.State\.CurrentEntryId is not null/u);
+});