test: derive expected scheme from page protocol in server-url e2e

The normalization test hardcoded https://127.0.0.1:9, which only holds on
the HTTPS dev server. The Docker E2E runs over HTTP, where normalizeServerUrl
correctly produces http://127.0.0.1:9 (it adopts the page's protocol — the
mixed-content fix), so the test failed in CI. Derive the expected scheme from
page.url() so it's correct on both HTTP and HTTPS.

https://claude.ai/code/session_01EeGweBeouxSsT6nSaXy8Pk

Author: claude

web/e2e/auth.spec.ts

@@ -30,12 +30,14 @@ test('server settings tests and connects to the default (reverse proxy)', async
 })
 
 test('server settings normalizes a scheme-less host using the page protocol', async ({ page }) => {
-  // The dev server is served over HTTPS, so a bare host must become https://
-  // (coercing to http:// would be blocked as mixed content on an HTTPS page).
+  // A bare host must adopt the page's own scheme (https on an HTTPS page, http on
+  // an HTTP one) — coercing to a fixed scheme would risk mixed-content blocking.
+  // The dev server runs over HTTPS and the Docker E2E over HTTP, so derive it.
   await page.goto('/login')
+  const expected = `${new URL(page.url()).protocol}//127.0.0.1:9`
   await page.getByRole('button', { name: /server settings/i }).click()
   await page.getByPlaceholder('Leave blank to use this site').fill('127.0.0.1:9')
   await page.getByRole('button', { name: /test & save/i }).click()
-  await expect(page.getByText('Current: https://127.0.0.1:9')).toBeVisible()
-  expect(await page.evaluate(() => localStorage.getItem('server_url'))).toBe('https://127.0.0.1:9')
+  await expect(page.getByText(`Current: ${expected}`)).toBeVisible()
+  expect(await page.evaluate(() => localStorage.getItem('server_url'))).toBe(expected)
 })