Merge pull request #2131 from deepseek-harness/fix/web-favicon-dark-mode

fix(web): make the favicon follow the color scheme

apps/web/tests/pwa-manifest.e2e.ts

@@ -25,3 +25,11 @@ it('ships install metadata with the built web application', async () => {
     }],
   })
 })
+
+it('ships a favicon that switches to a light mark under dark color scheme', async () => {
+  const favicon = await readFile(join(DIST_ROOT, 'favicon.svg'), 'utf8')
+  // The light fill must live inside the dark-scheme media query, so the icon
+  // stays black in light mode and only turns white under a dark scheme.
+  expect(favicon).toMatch(/@media \(prefers-color-scheme: dark\)\s*{\s*path\s*{[^}]*fill:\s*#fff/i)
+  expect(favicon).toContain('fill="#000"')
+})