test(capture): expect 800px inventory PNG floor

Ty UAT rejected phone photos under the 1600px bar.
Lock the mid-band case (shorter side 1000) and floor
geometry at 800×1067 / 0.8×800=640 before the code change.

frontend/src/png/inventory.test.ts

@@ -31,7 +31,7 @@ test('alpha contract: removed pixels transparent, slab pixels keep RGB at alpha
   const out = composeInventoryFrame(src, maskFor(bitset, { x: 1, y: 1, w: 4, h: 4 }), source);
 
   assert.equal(out.sourceBelowFloor, true);
-  assert.ok(out.width < 1600, 'undersized source stays small');
+  assert.ok(out.width < 800, 'undersized source stays small');
 
   let opaque = 0;
   let transparent = 0;
@@ -56,7 +56,7 @@ test('alpha contract: removed pixels transparent, slab pixels keep RGB at alpha
   assert.ok(transparent > 0, 'frame has transparent pixels');
 });
 
-test('3:4 frame at the floor: 2000×1800 slab → 1600×2133', () => {
+test('3:4 frame at the floor: 2000×1800 slab → 800×1067', () => {
   const source: Pick<Source, 'widthPx' | 'heightPx'> = { widthPx: 2000, heightPx: 1800 };
   const bitset = new Uint8Array(source.widthPx * source.heightPx).fill(1);
   const out = composeInventoryFrame(
@@ -64,11 +64,23 @@ test('3:4 frame at the floor: 2000×1800 slab → 1600×2133', () => {
     maskFor(bitset, { x: 0, y: 0, w: 2000, h: 1800 }),
     source,
   );
-  assert.equal(out.width, 1600);
+  assert.equal(out.width, 800);
-  assert.equal(out.height, 2133);
+  assert.equal(out.height, 1067);
   assert.equal(out.sourceBelowFloor, false);
 });
 
+test('mid-band: slab shorter side 1000 (between 800 and 1600) → at floor, not belowFloor', () => {
+  const source: Pick<Source, 'widthPx' | 'heightPx'> = { widthPx: 1200, heightPx: 1000 };
+  const bitset = new Uint8Array(source.widthPx * source.heightPx).fill(1);
+  const out = composeInventoryFrame(
+    makePhoto(source.widthPx, source.heightPx),
+    maskFor(bitset, { x: 0, y: 0, w: 1200, h: 1000 }),
+    source,
+  );
+  assert.equal(out.sourceBelowFloor, false);
+  assert.equal(out.width, 800);
+});
+
 test('80% fill: limiting dimension maps to 0.8 × frame side', () => {
   const source: Pick<Source, 'widthPx' | 'heightPx'> = { widthPx: 2200, heightPx: 2000 };
   const bitset = new Uint8Array(source.widthPx * source.heightPx).fill(1);
@@ -91,11 +103,11 @@ test('80% fill: limiting dimension maps to 0.8 × frame side', () => {
   const xs = [minx, maxx], ys = [miny, maxy];
   const wExtent = Math.max(...xs) - Math.min(...xs) + 1;
   const hExtent = Math.max(...ys) - Math.min(...ys) + 1;
-  assert.ok(Math.abs(wExtent - 1280) <= 2, `width extent ${wExtent} ≈ 1280 (0.8×1600)`);
+  assert.ok(Math.abs(wExtent - 640) <= 2, `width extent ${wExtent} ≈ 640 (0.8×800)`);
-  assert.ok(Math.abs(hExtent - 1152) <= 2, `height extent ${hExtent} ≈ 1152 (0.8×1800×0.64)`);
+  assert.ok(Math.abs(hExtent - 576) <= 2, `height extent ${hExtent} ≈ 576 (1800×0.32)`);
 });
 
-test('belowFloor: small slab → sourceBelowFloor, outW < 1600', () => {
+test('belowFloor: small slab → sourceBelowFloor, outW capped at floor (no upscale)', () => {
   const source: Pick<Source, 'widthPx' | 'heightPx'> = { widthPx: 900, heightPx: 700 };
   const bitset = new Uint8Array(source.widthPx * source.heightPx).fill(1);
   const out = composeInventoryFrame(
@@ -104,5 +116,5 @@ test('belowFloor: small slab → sourceBelowFloor, outW < 1600', () => {
     source,
   );
   assert.equal(out.sourceBelowFloor, true);
-  assert.ok(out.width < 1600, `outW ${out.width}`);
+  assert.ok(out.width <= 800, `outW ${out.width} must not exceed the floor`);
 });