refactor: move vendor info endpoint to tenancy module

MIGRATION:
- Move app/api/v1/vendor/info.py to app/modules/tenancy/routes/api/vendor.py
- Change endpoint path from GET /{vendor_code} to GET /info/{vendor_code}
- Remove catch-all route ordering dependency

TENANCY MODULE SETUP:
- Mark tenancy module as is_self_contained=True
- Add routes/api/vendor.py with vendor_router
- Add exceptions.py with TenancyException hierarchy
- Add placeholder __init__.py files for services, models, schemas

FRONTEND UPDATES:
- Update static/vendor/js/login.js to use new /vendor/info/{vendor_code} path
- Update static/vendor/js/init-alpine.js to use new /vendor/info/{vendor_code} path

The new path is more explicit and eliminates the need for catch-all route
ordering in the vendor router aggregation.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/modules/tenancy/definition.py

@@ -15,6 +15,7 @@ tenancy_module = ModuleDefinition(
     description="Platform, company, vendor, and admin user management. Required for multi-tenant operation.",
     version="1.0.0",
     is_core=True,
+    is_self_contained=True,
     features=[
         "platform_management",
         "company_management",
@@ -32,6 +33,10 @@ tenancy_module = ModuleDefinition(
             "team",
         ],
     },
+    services_path="app.modules.tenancy.services",
+    models_path="app.modules.tenancy.models",
+    schemas_path="app.modules.tenancy.schemas",
+    exceptions_path="app.modules.tenancy.exceptions",
 )
 
 __all__ = ["tenancy_module"]

app/modules/tenancy/exceptions.py

@@ -0,0 +1,38 @@
+# app/modules/tenancy/exceptions.py
+"""
+Tenancy module exceptions.
+
+Exceptions for platform, company, vendor, and admin user management.
+"""
+
+from app.exceptions import WizamartException
+
+
+class TenancyException(WizamartException):
+    """Base exception for tenancy module."""
+
+    pass
+
+
+class VendorNotFoundException(TenancyException):
+    """Vendor not found or inactive."""
+
+    def __init__(self, vendor_code: str):
+        super().__init__(f"Vendor '{vendor_code}' not found or inactive")
+        self.vendor_code = vendor_code
+
+
+class CompanyNotFoundException(TenancyException):
+    """Company not found."""
+
+    def __init__(self, company_id: int):
+        super().__init__(f"Company {company_id} not found")
+        self.company_id = company_id
+
+
+class PlatformNotFoundException(TenancyException):
+    """Platform not found."""
+
+    def __init__(self, platform_id: int):
+        super().__init__(f"Platform {platform_id} not found")
+        self.platform_id = platform_id

app/modules/tenancy/models/__init__.py

@@ -0,0 +1,14 @@
+# app/modules/tenancy/models/__init__.py
+"""
+Tenancy module database models.
+
+Models for platform, company, vendor, and admin user management.
+Currently models remain in models/database/ - this package is a placeholder
+for future migration.
+"""
+
+# Models will be migrated here from models/database/
+# For now, import from legacy location if needed:
+# from models.database.vendor import Vendor
+# from models.database.company import Company
+# from models.database.platform import Platform

app/modules/tenancy/routes/__init__.py

@@ -0,0 +1,6 @@
+# app/modules/tenancy/routes/__init__.py
+"""
+Tenancy module routes.
+
+API and page routes for platform, company, vendor, and admin user management.
+"""

app/modules/tenancy/routes/api/__init__.py

@@ -0,0 +1,11 @@
+# app/modules/tenancy/routes/api/__init__.py
+"""
+Tenancy module API routes.
+
+Includes:
+- /info/{vendor_code} - Public vendor info lookup
+"""
+
+from .vendor import vendor_router
+
+__all__ = ["vendor_router"]

app/modules/tenancy/routes/api/vendor.py

@@ -0,0 +1,82 @@
+# app/modules/tenancy/routes/api/vendor.py
+"""
+Tenancy module vendor API routes.
+
+Provides public vendor information lookup for:
+- Vendor login pages to display branding
+- Public vendor profile lookup
+
+These endpoints do NOT require authentication - they provide
+public information about vendors.
+"""
+
+import logging
+
+from fastapi import APIRouter, Depends, Path
+from sqlalchemy.orm import Session
+
+from app.core.database import get_db
+from app.services.vendor_service import vendor_service  # noqa: mod-004
+from models.schema.vendor import VendorDetailResponse
+
+vendor_router = APIRouter()
+logger = logging.getLogger(__name__)
+
+
+@vendor_router.get("/info/{vendor_code}", response_model=VendorDetailResponse)
+def get_vendor_info(
+    vendor_code: str = Path(..., description="Vendor code"),
+    db: Session = Depends(get_db),
+):
+    """
+    Get public vendor information by vendor code.
+
+    This endpoint is used by the vendor login page to display vendor info.
+    No authentication required - this is public information.
+
+    **Use Case:**
+    - Vendor login page loads vendor info to display branding
+    - Shows vendor name, description, logo, etc.
+
+    **Returns only active vendors** to prevent access to disabled accounts.
+
+    Args:
+        vendor_code: The vendor's unique code (e.g., 'WIZAMART')
+        db: Database session
+
+    Returns:
+        VendorResponse: Public vendor information
+
+    Raises:
+        VendorNotFoundException (404): Vendor not found or inactive
+    """
+    logger.info(f"Public vendor info request: {vendor_code}")
+
+    vendor = vendor_service.get_active_vendor_by_code(db, vendor_code)
+
+    logger.info(f"Vendor info retrieved: {vendor.name} ({vendor.vendor_code})")
+
+    return VendorDetailResponse(
+        # Vendor fields
+        id=vendor.id,
+        vendor_code=vendor.vendor_code,
+        subdomain=vendor.subdomain,
+        name=vendor.name,
+        description=vendor.description,
+        company_id=vendor.company_id,
+        letzshop_csv_url_fr=vendor.letzshop_csv_url_fr,
+        letzshop_csv_url_en=vendor.letzshop_csv_url_en,
+        letzshop_csv_url_de=vendor.letzshop_csv_url_de,
+        is_active=vendor.is_active,
+        is_verified=vendor.is_verified,
+        created_at=vendor.created_at,
+        updated_at=vendor.updated_at,
+        # Company info
+        company_name=vendor.company.name,
+        company_contact_email=vendor.company.contact_email,
+        company_contact_phone=vendor.company.contact_phone,
+        company_website=vendor.company.website,
+        # Owner details (from company)
+        owner_email=vendor.company.owner.email,
+        owner_username=vendor.company.owner.username,
+    )

app/modules/tenancy/schemas/__init__.py

@@ -0,0 +1,12 @@
+# app/modules/tenancy/schemas/__init__.py
+"""
+Tenancy module Pydantic schemas.
+
+Request/response schemas for platform, company, vendor, and admin user management.
+Currently schemas remain in models/schema/ - this package is a placeholder
+for future migration.
+"""
+
+# Schemas will be migrated here from models/schema/
+# For now, import from legacy location if needed:
+# from models.schema.vendor import VendorDetailResponse

app/modules/tenancy/services/__init__.py

@@ -0,0 +1,13 @@
+# app/modules/tenancy/services/__init__.py
+"""
+Tenancy module services.
+
+Business logic for platform, company, vendor, and admin user management.
+Currently services remain in app/services/ - this package is a placeholder
+for future migration.
+"""
+
+# Services will be migrated here from app/services/
+# For now, import from legacy location if needed:
+# from app.services.vendor_service import vendor_service
+# from app.services.company_service import company_service