test(e2e): widen cluster-free run to all guest-signin specs via global-header OCI

Install the global-header plugin from OCI (top bar + profile dropdown) so the
Settings and Sign-out specs render, and drop the grep so all three
guest-signin-happy-path tests run off-cluster (home + settings + sign-out).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: gustavolira

e2e-tests/local-harness/dynamic-plugins.yaml

@@ -1,12 +1,15 @@
 # Cluster-free harness plugin set — installed via install-dynamic-plugins from OCI
 # (ghcr, pulled with skopeo), so no dynamic-plugins/dist source build is needed.
 #
-# Only the dynamic-home-page frontend plugin is required: app-config.dynamic-plugins.yaml
-# (loaded by the harness) already configures it (route / -> DynamicHomePage, SearchBar,
-# QuickAccessCard, Starred Entities), so the guest-signin home-page test renders off-cluster.
+# app-config.dynamic-plugins.yaml (loaded by the harness) already configures these
+# plugins, so the existing RHDH specs render off-cluster.
 #
-# NOTE: OCI tag is backstage 1.49.4 (RHDH is on 1.52.0) — bump to a matching tag when the
-# overlays repo publishes one.
+# NOTE: OCI tags are backstage 1.49.4 (RHDH is on 1.52.0) — bump to matching tags when
+# the overlays repo publishes them.
 plugins:
+  # Home page: route / -> DynamicHomePage, SearchBar, QuickAccessCard, Starred Entities.
   - package: oci://ghcr.io/redhat-developer/rhdh-plugin-export-overlays/red-hat-developer-hub-backstage-plugin-dynamic-home-page:bs_1.49.4__1.13.1!red-hat-developer-hub-backstage-plugin-dynamic-home-page
     disabled: false
+  # Global header (top bar + profile dropdown) — needed by the Settings / Sign-out specs.
+  - package: oci://ghcr.io/redhat-developer/rhdh-plugin-export-overlays/red-hat-developer-hub-backstage-plugin-global-header:bs_1.49.4__1.21.6!red-hat-developer-hub-backstage-plugin-global-header
+    disabled: false

e2e-tests/playwright.legacy-local.config.ts

@@ -42,13 +42,11 @@ export default defineConfig({
   testDir: "./playwright",
   // Fails fast if dynamic-plugins-root has not been populated.
   globalSetup: "./playwright/support/local-harness-global-setup.ts",
-  // Runs only what is verified green off-cluster so far: the guest-signin home-page
-  // test (Quick Access from the dynamic home-page plugin). `grep` scopes to that test
-  // because its two siblings — and several other UI specs — navigate via the top-right
-  // profile dropdown (needs the global-header plugin) or need per-spec config. See
-  // docs/e2e-tests/local-e2e-harness.md "Known issues". Widen as specs are validated.
+  // Existing RHDH specs validated to run off-cluster. The dynamic-home-page and
+  // global-header plugins are installed from OCI (see local-harness/dynamic-plugins.yaml),
+  // so guest sign-in, the home page, Settings and sign-out all render. Widen as more
+  // specs are validated.
   testMatch: ["e2e/guest-signin-happy-path.spec.ts"],
-  grep: /Homepage renders with Search Bar/u,
   timeout: 90 * 1000,
   forbidOnly: isCI,
   retries: isCI ? 1 : 0,