fix: SUG-6 API key modal, SUG-4 project activity filter, WooCommerce health auth

- SUG-6: Replace auto-closing inline banner with persistent modal on Connect
  page — key stays visible until user clicks "Done"
- SUG-4: Filter health_metric_recorded/health_check from project detail activity
- WooCommerce: Accept consumer_key/consumer_secret credentials (preferred) with
  username/app_password fallback; fix health check to use WC endpoint and creds

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_woocommerce_plugin.py

@@ -44,11 +44,10 @@ class TestWooCommercePluginInit:
         assert WooCommercePlugin.get_plugin_name() == "woocommerce"
 
     def test_required_config_keys(self):
-        """Should require url, username, app_password."""
+        """Should require url only (credentials checked at init)."""
         keys = WooCommercePlugin.get_required_config_keys()
         assert "url" in keys
-        assert "username" in keys
-        assert "app_password" in keys
+        assert len(keys) == 1
 
     def test_missing_url_raises(self):
         """Should raise ValueError for missing URL."""
@@ -57,9 +56,11 @@ class TestWooCommercePluginInit:
             WooCommercePlugin(config)
 
     def test_missing_credentials_raises(self):
-        """Should raise ValueError for missing credentials."""
+        """Should raise ConfigurationError for missing credentials."""
+        from plugins.wordpress.client import ConfigurationError
+
         config = {"url": "https://shop.example.com"}
-        with pytest.raises(ValueError, match="Missing required configuration"):
+        with pytest.raises(ConfigurationError, match="credentials not configured"):
             WooCommercePlugin(config)
 
     def test_custom_project_id(self):