fix(lint): auto-fix ruff violations and tune lint rules

- Auto-fixed 4,496 lint issues (import sorting, modern syntax, etc.)
- Added ignore rules for patterns intentional in this codebase:
  E402 (late imports), E712 (SQLAlchemy filters), B904 (raise from),
  SIM108/SIM105/SIM117 (readability preferences)
- Added per-file ignores for tests and scripts
- Excluded broken scripts/rename_terminology.py (has curly quotes)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

middleware/language.py

@@ -23,8 +23,8 @@ from app.utils.i18n import (
     DEFAULT_LANGUAGE,
     SUPPORTED_LANGUAGES,
     parse_accept_language,
-    resolve_storefront_language,
     resolve_store_dashboard_language,
+    resolve_storefront_language,
 )
 
 logger = logging.getLogger(__name__)

middleware/platform_context.py

@@ -23,7 +23,6 @@ from sqlalchemy.orm import Session
 
 from app.core.database import get_db
 from app.core.frontend_detector import FrontendDetector
-from app.modules.enums import FrontendType
 from app.modules.tenancy.models import Platform
 
 # Note: We use pure ASGI middleware (not BaseHTTPMiddleware) to enable path rewriting

middleware/store_context.py

@@ -24,8 +24,7 @@ from starlette.middleware.base import BaseHTTPMiddleware
 from app.core.config import settings
 from app.core.database import get_db
 from app.core.frontend_detector import FrontendDetector
-from app.modules.tenancy.models import Store
-from app.modules.tenancy.models import StoreDomain
+from app.modules.tenancy.models import Store, StoreDomain
 
 logger = logging.getLogger(__name__)