feat: add complete company management UI

- Create companies list page with stats (total, verified, active, vendor count)
- Add company creation form with owner account generation
- Implement companies.js with full CRUD operations (list, create, edit, delete)
- Add Companies menu item to admin sidebar (desktop + mobile)
- Create company admin page routes (/admin/companies, /admin/companies/create)
- Register companies API router in admin __init__.py

Features:
- List all companies with pagination
- Create company with automatic owner user creation
- Display temporary password for new owner accounts
- Edit company information
- Delete company (only if no vendors)
- Toggle active/verified status
- Show vendor count per company

UI Components:
- Stats cards (total companies, verified, active, total vendors)
- Company table with status badges
- Create form with validation
- Success/error messaging
- Responsive design with dark mode support

app/api/v1/admin/__init__.py

@@ -28,8 +28,10 @@ from . import (
     audit,
     auth,
     code_quality,
+    companies,
     content_pages,
     dashboard,
+    logs,
     marketplace,
     monitoring,
     notifications,
@@ -53,9 +55,12 @@ router.include_router(auth.router, tags=["admin-auth"])
 
 
 # ============================================================================
-# Vendor Management
+# Company & Vendor Management
 # ============================================================================
 
+# Include company management endpoints
+router.include_router(companies.router, tags=["admin-companies"])
+
 # Include vendor management endpoints
 router.include_router(vendors.router, tags=["admin-vendors"])
 
@@ -111,6 +116,9 @@ router.include_router(settings.router, tags=["admin-settings"])
 # Include notifications and alerts endpoints
 router.include_router(notifications.router, tags=["admin-notifications"])
 
+# Include log management endpoints
+router.include_router(logs.router, tags=["admin-logs"])
+
 
 # ============================================================================
 # Code Quality & Architecture