fix: use regex pattern for URL assertion after logout

toHaveURL('/') matches the complete URL string, not the path.
Use /\/$/ regex to match URLs ending with '/' so the assertion
works with full URLs like http://localhost:4173/

Author: claude

tests/e2e/auth/login.spec.ts

@@ -149,7 +149,7 @@ test.describe('Logout', () => {
     await mapPage.logout();
 
     // Should be back on login page
-    await expect(page).toHaveURL('/');
+    await expect(page).toHaveURL(/\/$/);
     await expect(loginPage.loginButton).toBeVisible();
   });