feat(loyalty): fix Google Wallet integration and improve enrollment flow

- Fix Google Wallet class creation: add required issuerName field (merchant name),
  programLogo with default logo fallback, hexBackgroundColor default
- Add default loyalty logo assets (200px + 512px) for programs without custom logos
- Smart retry: skip retries on 400/401/403/404 client errors (not transient)
- Fix enrollment success page: use sessionStorage for wallet URLs instead of
  authenticated API call (self-enrolled customers have no session)
- Hide wallet section on success page when no wallet URLs available
- Wire up T&C modal on enrollment page with program.terms_text
- Add startup validation for Google/Apple Wallet configs in lifespan
- Add admin wallet status dashboard endpoint and UI (moved to service layer)
- Fix Apple Wallet push notifications with real APNs HTTP/2 implementation
- Fix docs: correct enrollment URLs (port, path segments, /v1 prefix)
- Fix test assertion: !loyalty-enroll! → !enrollment!

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

app/modules/loyalty/routes/api/admin.py

@@ -259,3 +259,17 @@ def get_platform_stats(
 ):
     """Get platform-wide loyalty statistics."""
     return program_service.get_platform_stats(db)
+
+
+# =============================================================================
+# Wallet Integration Status
+# =============================================================================
+
+
+@router.get("/wallet-status")
+def get_wallet_status(
+    current_user: User = Depends(get_current_admin_api),
+    db: Session = Depends(get_db),
+):
+    """Get wallet integration status for the platform."""
+    return program_service.get_wallet_integration_status(db)