style: apply black and isort formatting across entire codebase

- Standardize quote style (single to double quotes)
- Reorder and group imports alphabetically
- Fix line breaks and indentation for consistency
- Apply PEP 8 formatting standards

Also updated Makefile to exclude both venv and .venv from code quality checks.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

tests/integration/api/v1/vendor/test_dashboard.py

@@ -23,8 +23,7 @@ class TestVendorDashboardAPI:
     ):
         """Test dashboard stats returns correct data structure"""
         response = client.get(
-            "/api/v1/vendor/dashboard/stats",
-            headers=vendor_user_headers
+            "/api/v1/vendor/dashboard/stats", headers=vendor_user_headers
         )
 
         assert response.status_code == 200
@@ -66,9 +65,9 @@ class TestVendorDashboardAPI:
         self, client, db, test_vendor_user, auth_manager
     ):
         """Test that dashboard stats only show data for the authenticated vendor"""
-        from models.database.vendor import Vendor, VendorUser
-        from models.database.product import Product
         from models.database.marketplace_product import MarketplaceProduct
+        from models.database.product import Product
+        from models.database.vendor import Vendor, VendorUser
 
         # Create two separate vendors with different data
         vendor1 = Vendor(
@@ -118,10 +117,7 @@ class TestVendorDashboardAPI:
         vendor1_headers = {"Authorization": f"Bearer {token_data['access_token']}"}
 
         # Get stats for vendor1
-        response = client.get(
-            "/api/v1/vendor/dashboard/stats",
-            headers=vendor1_headers
-        )
+        response = client.get("/api/v1/vendor/dashboard/stats", headers=vendor1_headers)
 
         assert response.status_code == 200
         data = response.json()
@@ -130,9 +126,7 @@ class TestVendorDashboardAPI:
         assert data["vendor"]["id"] == vendor1.id
         assert data["products"]["total"] == 3
 
-    def test_dashboard_stats_without_vendor_association(
-        self, client, db, auth_manager
-    ):
+    def test_dashboard_stats_without_vendor_association(self, client, db, auth_manager):
         """Test dashboard stats for user not associated with any vendor"""
         from models.database.user import User
 
@@ -206,8 +200,7 @@ class TestVendorDashboardAPI:
     ):
         """Test dashboard stats for vendor with no data"""
         response = client.get(
-            "/api/v1/vendor/dashboard/stats",
-            headers=vendor_user_headers
+            "/api/v1/vendor/dashboard/stats", headers=vendor_user_headers
         )
 
         assert response.status_code == 200
@@ -224,8 +217,8 @@ class TestVendorDashboardAPI:
         self, client, db, vendor_user_headers, test_vendor_with_vendor_user
     ):
         """Test dashboard stats accuracy with actual products"""
-        from models.database.product import Product
         from models.database.marketplace_product import MarketplaceProduct
+        from models.database.product import Product
 
         # Create marketplace products
         mp = MarketplaceProduct(
@@ -249,8 +242,7 @@ class TestVendorDashboardAPI:
 
         # Get stats
         response = client.get(
-            "/api/v1/vendor/dashboard/stats",
-            headers=vendor_user_headers
+            "/api/v1/vendor/dashboard/stats", headers=vendor_user_headers
         )
 
         assert response.status_code == 200
@@ -267,8 +259,7 @@ class TestVendorDashboardAPI:
 
         start_time = time.time()
         response = client.get(
-            "/api/v1/vendor/dashboard/stats",
-            headers=vendor_user_headers
+            "/api/v1/vendor/dashboard/stats", headers=vendor_user_headers
         )
         end_time = time.time()
 
@@ -284,8 +275,7 @@ class TestVendorDashboardAPI:
         responses = []
         for _ in range(3):
             response = client.get(
-                "/api/v1/vendor/dashboard/stats",
-                headers=vendor_user_headers
+                "/api/v1/vendor/dashboard/stats", headers=vendor_user_headers
             )
             responses.append(response)