From 165dabc5d7196f4786fb141e37337eedaef1ecef Mon Sep 17 00:00:00 2001
From: Matysh <web@justbusiness.site>
Date: Fri, 28 Aug 2026 07:36:34 +0300
Subject: [PATCH] test: restore lazy split mutation coverage

Issue: #337
User-Visible: no
---
 demo/smoke_space_tab_reorder.mjs | 23 +++++++++++++++++++++++
 scripts/mutation-gate.mjs        |  6 +++---
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/demo/smoke_space_tab_reorder.mjs b/demo/smoke_space_tab_reorder.mjs
index 25940792..a871e316 100644
--- a/demo/smoke_space_tab_reorder.mjs
+++ b/demo/smoke_space_tab_reorder.mjs
@@ -192,6 +192,29 @@ await settle();
 await page.waitForTimeout(550);
 out.outsideReleaseEndedDrag = await page.evaluate(() => window.__card._tabDrag === null);
 out.outsideReleaseDidNotWrite = await writeCount() === writesBeforeOutside;
+
+// Exercise the window-level release fallback independently. Real mouse input
+// normally grants pointer capture, which would route pointerup back to the
+// source tab and let a missing window listener pass this regression.
+const fallbackIds = await ids();
+const writesBeforeFallback = await writeCount();
+await holdDrag(fallbackIds.at(-1), fallbackIds[0]);
+out.outsideFallbackReleasedCapture = await page.evaluate(() => {
+  const c = window.__card;
+  const drag = c._tabDrag;
+  const source = [...c.renderRoot.querySelectorAll('[data-hp="space-tab"]')]
+    .find((tab) => tab.dataset.id === drag?.id);
+  if (!source || !drag || !source.hasPointerCapture(drag.pointerId)) return false;
+  source.releasePointerCapture(drag.pointerId);
+  return !source.hasPointerCapture(drag.pointerId);
+});
+await page.mouse.move(stagePoint.x, stagePoint.y, { steps: 3 });
+await page.mouse.up();
+await settle();
+await page.waitForTimeout(550);
+out.outsideFallbackReleaseEndedDrag = await page.evaluate(() => window.__card._tabDrag === null);
+out.outsideFallbackReleaseDidNotWrite = await writeCount() === writesBeforeFallback;
+
 const activeBeforeRecovery = await page.evaluate(() => window.__card._space);
 const recoveryTarget = (await ids()).find((id) => id !== activeBeforeRecovery);
 const recoveryPoint = await tabPoint(recoveryTarget);
diff --git a/scripts/mutation-gate.mjs b/scripts/mutation-gate.mjs
index 178bd973..af64032d 100644
--- a/scripts/mutation-gate.mjs
+++ b/scripts/mutation-gate.mjs
@@ -3330,9 +3330,9 @@ const MUTANT_DEFINITIONS = [
     because: 'Plan architecture ink is visual chrome; leaving the wall outline at raw SVG units '
       + 'makes it five times thinner on a 1 cm grid (#239)',
     patches: [{
-      file: 'src/houseplan-card.ts',
-      find: '        stroke="${stroke}" stroke-width="${gridVisualUnits(0.6, this._cellCm)}"',
-      replace: '        stroke="${stroke}" stroke-width="0.6"',
+      file: 'src/styles/plan.styles.ts',
+      find: '      stroke-width: calc(0.6px * var(--hp-cell-visual-scale, 1));',
+      replace: '      stroke-width: 0.6px;',
     }],
   },
   {