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/admin/auth.py

@@ -20,7 +20,7 @@ from app.core.environment import should_use_secure_cookies
 from app.exceptions import InvalidCredentialsException
 from app.services.auth_service import auth_service
 from models.database.user import User
-from models.schema.auth import LoginResponse, UserLogin, UserResponse
+from models.schema.auth import LoginResponse, LogoutResponse, UserLogin, UserResponse
 
 router = APIRouter(prefix="/auth")
 logger = logging.getLogger(__name__)
@@ -97,7 +97,7 @@ def get_current_admin(current_user: User = Depends(get_current_admin_api)):
     return current_user
 
 
-@router.post("/logout")
+@router.post("/logout", response_model=LogoutResponse)
 def admin_logout(response: Response):
     """
     Admin logout endpoint.
@@ -115,4 +115,4 @@ def admin_logout(response: Response):
 
     logger.debug("Deleted admin_token cookie")
 
-    return {"message": "Logged out successfully"}
+    return LogoutResponse(message="Logged out successfully")