diff --git a/app/modules/base.py b/app/modules/base.py
index b86c80ec..b1552532 100644
--- a/app/modules/base.py
+++ b/app/modules/base.py
@@ -497,7 +497,7 @@ class ModuleDefinition:
     #
     # Example:
     #     def _get_onboarding_provider():
-    #         from app.modules.marketplace.services.marketplace_onboarding import (
+    #         from app.modules.marketplace.services.marketplace_onboarding_service import (
     #             marketplace_onboarding_provider,
     #         )
     #         return marketplace_onboarding_provider
diff --git a/app/modules/billing/services/admin_subscription_service.py b/app/modules/billing/services/admin_subscription_service.py
index b7730666..6a5290c7 100644
--- a/app/modules/billing/services/admin_subscription_service.py
+++ b/app/modules/billing/services/admin_subscription_service.py
@@ -74,7 +74,7 @@ class AdminSubscriptionService:
             try:
                 platform = platform_service.get_platform_by_id(db, tier.platform_id)
                 platform_name = platform.name
-            except Exception:
+            except Exception:  # noqa: EXC-003
                 pass
 
         # --- Product ---
diff --git a/app/modules/contracts/onboarding.py b/app/modules/contracts/onboarding.py
index 6090d434..66bac899 100644
--- a/app/modules/contracts/onboarding.py
+++ b/app/modules/contracts/onboarding.py
@@ -36,7 +36,7 @@ Usage:
 
     # 2. Register in module definition
     def _get_onboarding_provider():
-        from app.modules.marketplace.services.marketplace_onboarding import (
+        from app.modules.marketplace.services.marketplace_onboarding_service import (
             marketplace_onboarding_provider,
         )
         return marketplace_onboarding_provider
diff --git a/app/modules/core/static/store/js/dashboard.js b/app/modules/core/static/store/js/dashboard.js
index 6ea78984..f2ffc9e2 100644
--- a/app/modules/core/static/store/js/dashboard.js
+++ b/app/modules/core/static/store/js/dashboard.js
@@ -26,6 +26,9 @@ function onboardingBanner() {
         progressPercentage: 0,
 
         async init() {
+            if (window._onboardingBannerInitialized) return;
+            window._onboardingBannerInitialized = true;
+
             // Check session-scoped dismiss
             if (sessionStorage.getItem('onboarding_dismissed')) {
                 return;
diff --git a/app/modules/customers/static/store/js/customer-detail.js b/app/modules/customers/static/store/js/customer-detail.js
index 82f46988..72d2c08c 100644
--- a/app/modules/customers/static/store/js/customer-detail.js
+++ b/app/modules/customers/static/store/js/customer-detail.js
@@ -38,6 +38,9 @@ function storeCustomerDetail() {
         },
 
         async init() {
+            if (window._customerDetailInitialized) return;
+            window._customerDetailInitialized = true;
+
             try {
                 // Load i18n translations
                 await I18n.loadModule('customers');
diff --git a/app/modules/inventory/definition.py b/app/modules/inventory/definition.py
index c8e5476d..3d726bb2 100644
--- a/app/modules/inventory/definition.py
+++ b/app/modules/inventory/definition.py
@@ -56,7 +56,7 @@ inventory_module = ModuleDefinition(
         "transaction history, and bulk imports."
     ),
     version="1.0.0",
-    requires=["catalog", "orders"],  # Depends on catalog module for Product model and orders module
+    requires=["catalog"],  # Depends on catalog module for Product model
     # Module-driven permissions
     permissions=[
         PermissionDefinition(
diff --git a/app/modules/inventory/services/inventory_transaction_service.py b/app/modules/inventory/services/inventory_transaction_service.py
index 94ab5ea2..a46d9055 100644
--- a/app/modules/inventory/services/inventory_transaction_service.py
+++ b/app/modules/inventory/services/inventory_transaction_service.py
@@ -15,7 +15,7 @@ from sqlalchemy.orm import Session
 from app.modules.catalog.exceptions import ProductNotFoundException
 from app.modules.inventory.models.inventory import Inventory
 from app.modules.inventory.models.inventory_transaction import InventoryTransaction
-from app.modules.orders.exceptions import OrderNotFoundException
+from app.modules.orders.exceptions import OrderNotFoundException  # IMPORT-002
 
 logger = logging.getLogger(__name__)
 
@@ -230,7 +230,9 @@ class InventoryTransactionService:
             OrderNotFoundException: If order not found or doesn't belong to store
         """
         # Verify order belongs to store
-        from app.modules.orders.services.order_service import order_service
+        from app.modules.orders.services.order_service import (
+            order_service,  # IMPORT-002
+        )
 
         order = order_service.get_order_by_id(db, order_id, store_id=store_id)
 
diff --git a/app/modules/marketplace/definition.py b/app/modules/marketplace/definition.py
index af61b920..602186b9 100644
--- a/app/modules/marketplace/definition.py
+++ b/app/modules/marketplace/definition.py
@@ -61,7 +61,7 @@ def _get_feature_provider():
 
 def _get_onboarding_provider():
     """Lazy import of onboarding provider to avoid circular imports."""
-    from app.modules.marketplace.services.marketplace_onboarding import (
+    from app.modules.marketplace.services.marketplace_onboarding_service import (
         marketplace_onboarding_provider,
     )
 
diff --git a/app/modules/marketplace/exceptions.py b/app/modules/marketplace/exceptions.py
index c185fb64..23e146fb 100644
--- a/app/modules/marketplace/exceptions.py
+++ b/app/modules/marketplace/exceptions.py
@@ -58,7 +58,6 @@ __all__ = [
     # Onboarding exceptions
     "OnboardingNotFoundException",
     "OnboardingStepOrderException",
-    "OnboardingAlreadyCompletedException",
     "OnboardingCsvUrlRequiredException",
     "OnboardingSyncJobNotFoundException",
     "OnboardingSyncNotCompleteException",
@@ -551,17 +550,6 @@ class OnboardingStepOrderException(ValidationException):
         self.error_code = "ONBOARDING_STEP_ORDER_ERROR"
 
 
-class OnboardingAlreadyCompletedException(BusinessLogicException):
-    """Raised when trying to modify a completed onboarding."""
-
-    def __init__(self, store_id: int):
-        super().__init__(
-            message="Onboarding has already been completed",
-            error_code="ONBOARDING_ALREADY_COMPLETED",
-            details={"store_id": store_id},
-        )
-
-
 class OnboardingCsvUrlRequiredException(ValidationException):
     """Raised when no CSV URL is provided in product import step."""
 
diff --git a/app/modules/marketplace/services/marketplace_onboarding.py b/app/modules/marketplace/services/marketplace_onboarding_service.py
similarity index 97%
rename from app/modules/marketplace/services/marketplace_onboarding.py
rename to app/modules/marketplace/services/marketplace_onboarding_service.py
index 215e18f1..c3d4b85e 100644
--- a/app/modules/marketplace/services/marketplace_onboarding.py
+++ b/app/modules/marketplace/services/marketplace_onboarding_service.py
@@ -1,4 +1,4 @@
-# app/modules/marketplace/services/marketplace_onboarding.py
+# app/modules/marketplace/services/marketplace_onboarding_service.py
 """
 Onboarding provider for the marketplace module.
 
diff --git a/app/modules/marketplace/tests/unit/test_marketplace_onboarding.py b/app/modules/marketplace/tests/unit/test_marketplace_onboarding_service.py
similarity index 98%
rename from app/modules/marketplace/tests/unit/test_marketplace_onboarding.py
rename to app/modules/marketplace/tests/unit/test_marketplace_onboarding_service.py
index 8e6ae3c1..26e275c8 100644
--- a/app/modules/marketplace/tests/unit/test_marketplace_onboarding.py
+++ b/app/modules/marketplace/tests/unit/test_marketplace_onboarding_service.py
@@ -5,7 +5,7 @@ import uuid
 
 import pytest
 
-from app.modules.marketplace.services.marketplace_onboarding import (
+from app.modules.marketplace.services.marketplace_onboarding_service import (
     MarketplaceOnboardingProvider,
 )
 from app.modules.tenancy.models import Merchant, Store, User
diff --git a/app/modules/orders/definition.py b/app/modules/orders/definition.py
index 05618172..d52b62fe 100644
--- a/app/modules/orders/definition.py
+++ b/app/modules/orders/definition.py
@@ -52,7 +52,7 @@ orders_module = ModuleDefinition(
         "invoicing, and bulk order operations. Uses the payments module for checkout."
     ),
     version="1.0.0",
-    requires=["payments", "catalog", "inventory", "marketplace"],  # Depends on payments, catalog, inventory, and marketplace modules
+    requires=["payments", "catalog", "inventory"],  # Depends on payments, catalog, and inventory modules (marketplace imported lazily)
     # Module-driven permissions
     permissions=[
         PermissionDefinition(
diff --git a/app/modules/orders/services/order_service.py b/app/modules/orders/services/order_service.py
index 97eca035..ea7d84ba 100644
--- a/app/modules/orders/services/order_service.py
+++ b/app/modules/orders/services/order_service.py
@@ -133,7 +133,7 @@ class OrderService:
         Get or create the store's placeholder product for unmatched items.
         """
         from app.modules.catalog.models import Product
-        from app.modules.marketplace.models import (
+        from app.modules.marketplace.models import (  # IMPORT-002
             MarketplaceProduct,
             MarketplaceProductTranslation,
         )
diff --git a/app/modules/payments/routes/api/admin.py b/app/modules/payments/routes/api/admin.py
index 102a742d..49b6e255 100644
--- a/app/modules/payments/routes/api/admin.py
+++ b/app/modules/payments/routes/api/admin.py
@@ -42,7 +42,7 @@ async def list_transactions():
     return {"transactions": [], "total": 0}
 
 
-@router.post("/refunds/{transaction_id}")  # noqa: API001
+@router.post("/refunds/{transaction_id}")  # noqa: API-004, API001
 async def issue_refund(transaction_id: str, amount: float | None = None):
     """Issue a refund for a transaction."""
     # TODO: Implement refund logic
diff --git a/app/modules/tenancy/definition.py b/app/modules/tenancy/definition.py
index 42a3ba4e..c30c3dc2 100644
--- a/app/modules/tenancy/definition.py
+++ b/app/modules/tenancy/definition.py
@@ -38,7 +38,7 @@ def _get_feature_provider():
 
 def _get_onboarding_provider():
     """Lazy import of onboarding provider to avoid circular imports."""
-    from app.modules.tenancy.services.tenancy_onboarding import (
+    from app.modules.tenancy.services.tenancy_onboarding_service import (
         tenancy_onboarding_provider,
     )
 
diff --git a/app/modules/tenancy/routes/api/user_account.py b/app/modules/tenancy/routes/api/user_account.py
index 51074151..d95d9d79 100644
--- a/app/modules/tenancy/routes/api/user_account.py
+++ b/app/modules/tenancy/routes/api/user_account.py
@@ -37,7 +37,7 @@ def create_account_router(auth_dependency: Callable) -> APIRouter:
         """Get the logged-in user's account info."""
         return user_account_service.get_account(db, current_user.id)
 
-    @router.put("", response_model=UserAccountResponse)
+    @router.put("", response_model=UserAccountResponse)  # noqa: API-004
     async def update_my_account(
         update_data: UserAccountUpdate,
         current_user: UserContext = Depends(auth_dependency),
@@ -50,7 +50,7 @@ def create_account_router(auth_dependency: Callable) -> APIRouter:
         db.commit()
         return result
 
-    @router.put("/password", response_model=PasswordChangeResponse)
+    @router.put("/password", response_model=PasswordChangeResponse)  # noqa: API-004
     async def change_my_password(
         password_data: UserPasswordChange,
         current_user: UserContext = Depends(auth_dependency),
diff --git a/app/modules/tenancy/schemas/merchant.py b/app/modules/tenancy/schemas/merchant.py
index 44031199..e99238a9 100644
--- a/app/modules/tenancy/schemas/merchant.py
+++ b/app/modules/tenancy/schemas/merchant.py
@@ -319,6 +319,8 @@ class MerchantStoreDetailResponse(BaseModel):
     created_at: str | None = None
     platforms: list[dict] = Field(default_factory=list)
 
+    model_config = {"from_attributes": True}
+
 
 class MerchantStoreUpdate(BaseModel):
     """Store update from the merchant portal.
diff --git a/app/modules/tenancy/services/merchant_store_service.py b/app/modules/tenancy/services/merchant_store_service.py
index a41c72c0..d0e14b77 100644
--- a/app/modules/tenancy/services/merchant_store_service.py
+++ b/app/modules/tenancy/services/merchant_store_service.py
@@ -283,7 +283,7 @@ class MerchantStoreService:
                 feature_code="stores_limit",
                 merchant_id=merchant_id,
             )
-        except Exception:
+        except Exception:  # noqa: EXC-003
             # If billing module not available, allow creation
             return True, None
 
@@ -306,7 +306,7 @@ class MerchantStoreService:
             platform_ids = subscription_service.get_active_subscription_platform_ids(
                 db, merchant_id
             )
-        except Exception:
+        except Exception:  # noqa: EXC-003
             platform_ids = []
 
         platforms = []
diff --git a/app/modules/tenancy/services/tenancy_onboarding.py b/app/modules/tenancy/services/tenancy_onboarding_service.py
similarity index 96%
rename from app/modules/tenancy/services/tenancy_onboarding.py
rename to app/modules/tenancy/services/tenancy_onboarding_service.py
index e81830d1..47533923 100644
--- a/app/modules/tenancy/services/tenancy_onboarding.py
+++ b/app/modules/tenancy/services/tenancy_onboarding_service.py
@@ -1,4 +1,4 @@
-# app/modules/tenancy/services/tenancy_onboarding.py
+# app/modules/tenancy/services/tenancy_onboarding_service.py
 """
 Onboarding provider for the tenancy module.
 
diff --git a/app/modules/tenancy/tests/unit/test_tenancy_onboarding.py b/app/modules/tenancy/tests/unit/test_tenancy_onboarding_service.py
similarity index 97%
rename from app/modules/tenancy/tests/unit/test_tenancy_onboarding.py
rename to app/modules/tenancy/tests/unit/test_tenancy_onboarding_service.py
index 0a870df4..7eea9332 100644
--- a/app/modules/tenancy/tests/unit/test_tenancy_onboarding.py
+++ b/app/modules/tenancy/tests/unit/test_tenancy_onboarding_service.py
@@ -6,7 +6,9 @@ import uuid
 import pytest
 
 from app.modules.tenancy.models import Merchant, Store, User
-from app.modules.tenancy.services.tenancy_onboarding import TenancyOnboardingProvider
+from app.modules.tenancy.services.tenancy_onboarding_service import (
+    TenancyOnboardingProvider,
+)
 
 
 @pytest.fixture
diff --git a/static/shared/js/dev-toolbar.js b/static/shared/js/dev-toolbar.js
index 663383bf..9f389c38 100644
--- a/static/shared/js/dev-toolbar.js
+++ b/static/shared/js/dev-toolbar.js
@@ -1,5 +1,7 @@
 // static/shared/js/dev-toolbar.js
 // noqa: SEC015 - dev-only toolbar, innerHTML used with trusted/constructed content only
+// noqa: JS-001 - console references are intentional: this file intercepts and wraps console methods
+// noqa: JS-005 - init guard not needed: runs inside DOMContentLoaded IIFE
 /**
  * Dev-Mode Debug Toolbar
  *