Fix QR background gradient handling

test/qr-code.test.js

@@ -18,6 +18,33 @@ test('createStyledQrCodeSvg renders a styled qr svg for non-empty values', async
   assert.match(svg, /<svg[\s>]/);
 });
 
+test('createStyledQrCodeSvg keeps the qr background solid when gradient fields are provided', async () => {
+  const svg = await createStyledQrCodeSvg({
+    value: 'https://example.com',
+    qr_background_color_mode: 'gradient',
+    qr_background_gradient_type: 'radial',
+    qr_background_gradient_color_1: '#ff0000',
+    qr_background_gradient_color_2: '#0000ff'
+  });
+
+  assert.equal(typeof svg, 'string');
+  assert.match(svg, /<svg[\s>]/);
+  assert.doesNotMatch(svg, /<linearGradient|<radialGradient/i);
+});
+
+test('buildQrCodeContent forces qr background to single colour mode', async () => {
+  const content = await buildQrCodeContent({
+    value: 'https://example.com',
+    qr_background_color_mode: 'gradient',
+    qr_background_gradient_type: 'radial',
+    qr_background_gradient_color_1: '#ff0000',
+    qr_background_gradient_color_2: '#0000ff'
+  });
+
+  assert.equal(content.qr_background_color_mode, 'single');
+  assert.equal(content.qr_background_use_gradient, false);
+});
+
 test('createStyledQrCodeDataUrl renders a styled qr data url for non-empty values', async () => {
   const dataUrl = await createStyledQrCodeDataUrl('https://example.com');