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/analytics.py

@@ -1,6 +1,8 @@
 # app/api/v1/vendor/analytics.py
 """
 Vendor analytics and reporting endpoints.
+
+Vendor Context: Uses token_vendor_id from JWT token (authenticated vendor API pattern)
 """
 
 import logging
@@ -10,21 +12,27 @@ from sqlalchemy.orm import Session
 
 from app.api.deps import get_current_vendor_api
 from app.core.database import get_db
+from app.exceptions import InvalidTokenException
 from app.services.stats_service import stats_service
-from middleware.vendor_context import require_vendor_context
 from models.database.user import User
-from models.database.vendor import Vendor
 
 router = APIRouter(prefix="/analytics")
 logger = logging.getLogger(__name__)
 
 
+def _get_vendor_id_from_token(current_user: User) -> int:
+    """Helper to get vendor_id from JWT token."""
+    if not hasattr(current_user, "token_vendor_id"):
+        raise InvalidTokenException("Token missing vendor information. Please login again.")
+    return current_user.token_vendor_id
+
+
 @router.get("")
 def get_vendor_analytics(
     period: str = Query("30d", description="Time period: 7d, 30d, 90d, 1y"),
-    vendor: Vendor = Depends(require_vendor_context()),
     current_user: User = Depends(get_current_vendor_api),
     db: Session = Depends(get_db),
 ):
     """Get vendor analytics data for specified time period."""
-    return stats_service.get_vendor_analytics(db, vendor.id, period)
+    vendor_id = _get_vendor_id_from_token(current_user)
+    return stats_service.get_vendor_analytics(db, vendor_id, period)