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>

app/api/v1/vendor/payments.py

@@ -1,10 +1,11 @@
-# Payment configuration and processing 
+# Payment configuration and processing
 # app/api/v1/vendor/payments.py
 """
 Vendor payment configuration and processing endpoints.
 """
 
 import logging
+
 from fastapi import APIRouter, Depends
 from sqlalchemy.orm import Session
 
@@ -20,9 +21,9 @@ logger = logging.getLogger(__name__)
 
 @router.get("/config")
 def get_payment_configuration(
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Get vendor payment configuration.
@@ -38,16 +39,16 @@ def get_payment_configuration(
         "accepted_methods": [],
         "currency": "EUR",
         "stripe_connected": False,
-        "message": "Payment configuration coming in Slice 5"
+        "message": "Payment configuration coming in Slice 5",
     }
 
 
 @router.put("/config")
 def update_payment_configuration(
-        payment_config: dict,
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    payment_config: dict,
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Update vendor payment configuration.
@@ -58,17 +59,15 @@ def update_payment_configuration(
     - Update accepted payment methods
     - Validate configuration before saving
     """
-    return {
-        "message": "Payment configuration update coming in Slice 5"
-    }
+    return {"message": "Payment configuration update coming in Slice 5"}
 
 
 @router.post("/stripe/connect")
 def connect_stripe_account(
-        stripe_data: dict,
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    stripe_data: dict,
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Connect Stripe account for payment processing.
@@ -79,16 +78,14 @@ def connect_stripe_account(
     - Verify Stripe account is active
     - Enable payment processing
     """
-    return {
-        "message": "Stripe connection coming in Slice 5"
-    }
+    return {"message": "Stripe connection coming in Slice 5"}
 
 
 @router.delete("/stripe/disconnect")
 def disconnect_stripe_account(
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Disconnect Stripe account.
@@ -98,16 +95,14 @@ def disconnect_stripe_account(
     - Disable payment processing
     - Warn about pending payments
     """
-    return {
-        "message": "Stripe disconnection coming in Slice 5"
-    }
+    return {"message": "Stripe disconnection coming in Slice 5"}
 
 
 @router.get("/methods")
 def get_payment_methods(
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Get accepted payment methods for vendor.
@@ -116,17 +111,14 @@ def get_payment_methods(
     - Return list of enabled payment methods
     - Include: credit card, PayPal, bank transfer, etc.
     """
-    return {
-        "methods": [],
-        "message": "Payment methods coming in Slice 5"
-    }
+    return {"methods": [], "message": "Payment methods coming in Slice 5"}
 
 
 @router.get("/transactions")
 def get_payment_transactions(
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Get payment transaction history.
@@ -140,15 +132,15 @@ def get_payment_transactions(
     return {
         "transactions": [],
         "total": 0,
-        "message": "Payment transactions coming in Slice 5"
+        "message": "Payment transactions coming in Slice 5",
     }
 
 
 @router.get("/balance")
 def get_payment_balance(
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Get vendor payment balance and payout information.
@@ -164,17 +156,17 @@ def get_payment_balance(
         "pending_balance": 0.0,
         "currency": "EUR",
         "next_payout_date": None,
-        "message": "Payment balance coming in Slice 5"
+        "message": "Payment balance coming in Slice 5",
     }
 
 
 @router.post("/refund/{payment_id}")
 def refund_payment(
-        payment_id: int,
-        refund_data: dict,
-        vendor: Vendor = Depends(require_vendor_context()),
-        current_user: User = Depends(get_current_vendor_api),
-        db: Session = Depends(get_db),
+    payment_id: int,
+    refund_data: dict,
+    vendor: Vendor = Depends(require_vendor_context()),
+    current_user: User = Depends(get_current_vendor_api),
+    db: Session = Depends(get_db),
 ):
     """
     Process payment refund.
@@ -185,6 +177,4 @@ def refund_payment(
     - Update order status
     - Send refund notification to customer
     """
-    return {
-        "message": "Payment refund coming in Slice 5"
-    }
+    return {"message": "Payment refund coming in Slice 5"}