refactor: migrate vendor APIs to token-based context and consolidate architecture

## Vendor-in-Token Architecture (Complete Migration)
- Migrate all vendor API endpoints from require_vendor_context() to token_vendor_id
- Update permission dependencies to extract vendor from JWT token
- Add vendor exceptions: VendorAccessDeniedException, VendorOwnerOnlyException,
  InsufficientVendorPermissionsException
- Shop endpoints retain require_vendor_context() for URL-based detection
- Add AUTH-004 architecture rule enforcing vendor context patterns
- Fix marketplace router missing /marketplace prefix

## Exception Pattern Fixes (API-003/API-004)
- Services raise domain exceptions, endpoints let them bubble up
- Add code_quality and content_page exception modules
- Move business logic from endpoints to services (admin, auth, content_page)
- Fix exception handling in admin, shop, and vendor endpoints

## Tailwind CSS Consolidation
- Consolidate CSS to per-area files (admin, vendor, shop, platform)
- Remove shared/cdn-fallback.html and shared/css/tailwind.min.css
- Update all templates to use area-specific Tailwind output files
- Remove Node.js config (package.json, postcss.config.js, tailwind.config.js)

## Documentation & Cleanup
- Update vendor-in-token-architecture.md with completed migration status
- Update architecture-rules.md with new rules
- Move migration docs to docs/development/migration/
- Remove duplicate/obsolete documentation files
- Merge pytest.ini settings into pyproject.toml

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

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

app/api/v1/vendor/payments.py

@@ -2,6 +2,8 @@
 # app/api/v1/vendor/payments.py
 """
 Vendor payment configuration and processing endpoints.
+
+Vendor Context: Uses token_vendor_id from JWT token (authenticated vendor API pattern)
 """
 
 import logging
@@ -11,17 +13,23 @@ from sqlalchemy.orm import Session
 
 from app.api.deps import get_current_vendor_api
 from app.core.database import get_db
-from middleware.vendor_context import require_vendor_context
+from app.exceptions import InvalidTokenException
+from app.services.vendor_service import vendor_service
 from models.database.user import User
-from models.database.vendor import Vendor
 
 router = APIRouter(prefix="/payments")
 logger = logging.getLogger(__name__)
 
 
+def _get_vendor_from_token(current_user: User, db: Session):
+    """Helper to get vendor from JWT token."""
+    if not hasattr(current_user, "token_vendor_id"):
+        raise InvalidTokenException("Token missing vendor information. Please login again.")
+    return vendor_service.get_vendor_by_id(db, current_user.token_vendor_id)
+
+
 @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),
 ):
@@ -34,6 +42,7 @@ def get_payment_configuration(
     - Get currency settings
     - Return masked/secure information only
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     return {
         "payment_gateway": None,
         "accepted_methods": [],
@@ -46,7 +55,6 @@ def get_payment_configuration(
 @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),
 ):
@@ -59,13 +67,13 @@ def update_payment_configuration(
     - Update accepted payment methods
     - Validate configuration before saving
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     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),
 ):
@@ -78,12 +86,12 @@ def connect_stripe_account(
     - Verify Stripe account is active
     - Enable payment processing
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     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),
 ):
@@ -95,12 +103,12 @@ def disconnect_stripe_account(
     - Disable payment processing
     - Warn about pending payments
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     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),
 ):
@@ -111,12 +119,12 @@ def get_payment_methods(
     - Return list of enabled payment methods
     - Include: credit card, PayPal, bank transfer, etc.
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     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),
 ):
@@ -129,6 +137,7 @@ def get_payment_transactions(
     - Include payment details
     - Support pagination
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     return {
         "transactions": [],
         "total": 0,
@@ -138,7 +147,6 @@ def get_payment_transactions(
 
 @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),
 ):
@@ -151,6 +159,7 @@ def get_payment_balance(
     - Get next payout date
     - Get payout history
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     return {
         "available_balance": 0.0,
         "pending_balance": 0.0,
@@ -164,7 +173,6 @@ def get_payment_balance(
 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),
 ):
@@ -177,4 +185,5 @@ def refund_payment(
     - Update order status
     - Send refund notification to customer
     """
+    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
     return {"message": "Payment refund coming in Slice 5"}