feat(storefront): homepage, module gating, widget protocol, i18n fixes

Storefront homepage & module gating:
- CMS owns storefront GET / (slug="home" with 3-tier resolution)
- Catalog loses GET / (keeps /products only)
- Store root redirect (GET / → /store/dashboard or /store/login)
- Route gating: non-core modules return 404 when disabled for platform
- Seed store default homepages per platform

Widget protocol for customer dashboard:
- StorefrontDashboardCard contract in widgets.py
- Widget aggregator get_storefront_dashboard_cards()
- Orders and Loyalty module widget providers
- Dashboard template renders contributed cards (no module names)

Landing template module-agnostic:
- CTAs driven by storefront_nav (not hardcoded module names)
- Header actions check nav item IDs (not enabled_modules)
- Remove hardcoded "Add Product" sidebar button
- Remove all enabled_modules checks from storefront templates

i18n fixes:
- Title placeholder resolution ({{store_name}}) for store default pages
- Storefront nav label_keys prefixed with module code
- Add storefront.account.* keys to 6 modules (en/fr/de/lb)
- Header/footer CMS pages use get_translated_title(current_language)
- Footer labels use i18n keys instead of hardcoded English

Icon cleanup:
- Standardize on map-pin (remove location-marker alias)
- Replace all location-marker references across templates and docs

Docs:
- Storefront builder vision proposal (6 phases)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/loyalty/definition.py

@@ -58,6 +58,13 @@ def _get_feature_provider():
     return loyalty_feature_provider
 
 
+def _get_widget_provider():
+    """Lazy import of widget provider to avoid circular imports."""
+    from app.modules.loyalty.services.loyalty_widgets import loyalty_widget_provider
+
+    return loyalty_widget_provider
+
+
 def _get_onboarding_provider():
     """Lazy import of onboarding provider to avoid circular imports."""
     from app.modules.loyalty.services.loyalty_onboarding_service import (
@@ -289,7 +296,7 @@ loyalty_module = ModuleDefinition(
                 items=[
                     MenuItemDefinition(
                         id="loyalty",
-                        label_key="storefront.account.loyalty",
+                        label_key="loyalty.storefront.account.loyalty",
                         icon="gift",
                         route="account/loyalty",
                         order=60,
@@ -328,6 +335,8 @@ loyalty_module = ModuleDefinition(
     ],
     # Feature provider for billing feature gating
     feature_provider=_get_feature_provider,
+    # Widget provider for storefront dashboard cards
+    widget_provider=_get_widget_provider,
     # Onboarding provider for post-signup checklist
     onboarding_provider=_get_onboarding_provider,
 )

app/modules/loyalty/services/loyalty_widgets.py

@@ -0,0 +1,81 @@
+# app/modules/loyalty/services/loyalty_widgets.py
+"""
+Loyalty dashboard widget provider.
+
+Provides storefront dashboard cards for loyalty-related data.
+Implements get_storefront_dashboard_cards from DashboardWidgetProviderProtocol.
+"""
+
+import logging
+
+from sqlalchemy.orm import Session
+
+from app.modules.contracts.widgets import (
+    DashboardWidget,
+    StorefrontDashboardCard,
+    WidgetContext,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class LoyaltyWidgetProvider:
+    """Widget provider for loyalty module."""
+
+    @property
+    def widgets_category(self) -> str:
+        return "loyalty"
+
+    def get_store_widgets(
+        self,
+        db: Session,
+        store_id: int,
+        context: WidgetContext | None = None,
+    ) -> list[DashboardWidget]:
+        return []
+
+    def get_platform_widgets(
+        self,
+        db: Session,
+        platform_id: int,
+        context: WidgetContext | None = None,
+    ) -> list[DashboardWidget]:
+        return []
+
+    def get_storefront_dashboard_cards(
+        self,
+        db: Session,
+        store_id: int,
+        customer_id: int,
+        context: WidgetContext | None = None,
+    ) -> list[StorefrontDashboardCard]:
+        """Provide the Loyalty Rewards card for the customer dashboard."""
+        from app.modules.loyalty.models.loyalty_card import LoyaltyCard
+
+        card = (
+            db.query(LoyaltyCard)
+            .filter(
+                LoyaltyCard.customer_id == customer_id,
+                LoyaltyCard.is_active.is_(True),
+            )
+            .first()
+        )
+
+        points = card.points_balance if card else None
+        subtitle = "View your points & rewards" if card else "Join our rewards program"
+
+        return [
+            StorefrontDashboardCard(
+                key="loyalty.rewards",
+                icon="gift",
+                title="Loyalty Rewards",
+                subtitle=subtitle,
+                route="account/loyalty",
+                value=points,
+                value_label="Points Balance" if points is not None else None,
+                order=30,
+            ),
+        ]
+
+
+loyalty_widget_provider = LoyaltyWidgetProvider()