fix(capture): align masked tape calibration with #99

frontend/src/png/overlay.test.ts

@@ -1117,3 +1117,18 @@ test('buildOverlayPlan: tapered tips (~20% max width) included; length span ≥
   const tipSpanSrc = tipHi - tipLo;
   assert.ok(tipSpanSrc <= woodSpan + 2, `tips must not overshoot wood (${tipSpanSrc} vs ${woodSpan})`);
 });
+
+test('inventory source map rotates dimension graphics with the calibration slab', () => {
+  const width = 6, height = 4;
+  const bitset = new Uint8Array(width * height);
+  for (let y = 1; y <= 2; y++) for (let x = 1; x <= 4; x++) bitset[y * width + x] = 1;
+  const map = inventorySourceMap(
+    { x: 1, y: 1, w: 4, h: 2 },
+    { widthPx: width, heightPx: height },
+    2, 3, 1, bitset, 90,
+  ).mapToInventory;
+  const a = map(1, 1.5);
+  const b = map(4, 1.5);
+  assert.ok(Math.abs(b[0] - a[0]) < 1e-8, 'horizontal source axis maps vertical after clockwise rotation');
+  assert.ok(b[1] > a[1]);
+});