fix: correct CI test configuration and Navigation test provider

- Wrap Navigation tests in RoleSwitcherProvider to fix 6 test failures
- Use remote CI server URL (euchre-ci.notsosm.art) for acceptance tests in CI
- Fix DATABASE_URL reference from vars to secrets in PR workflow

playwright.config.ts

@@ -21,7 +21,7 @@ export default defineConfig({
   globalTeardown: require.resolve('./e2e/global.teardown'),
   // Use base URL for relative navigation
   use: {
-    baseURL: 'http://localhost:3000',
+    baseURL: process.env.CI ? 'https://euchre-ci.notsosm.art' : 'http://localhost:3000',
     // Collect trace when retrying the failed test.
     trace: 'on-first-retry',
     // Capture screenshot only on failure