Improve admin user experience by showing all stores and removing store selection

Fixes admin store visibility and removes unnecessary store selection for admins.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 91318273-c764-4fd4-be04-bdc12c38af32
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/9d9e1107-c416-4124-a939-a91c612c56a1.jpg

replit.md

@@ -170,6 +170,10 @@ Preferred communication style: Simple, everyday language.
 - ✅ Enhanced deletion confirmations in sales history and administration panels
 - ✅ Improved visual feedback with detailed confirmation dialogs showing item details
 - ✅ Added proper modal management with shadcn/ui AlertDialog components
+- ✅ Fixed critical admin user permissions bug preventing profile modifications
+- ✅ Added server-side protection against accidental admin role changes
+- ✅ Enhanced UI with disabled role field for self-editing administrators
+- ✅ Improved admin interface - "Tous" displayed for admin store access, no redundant store selector for admin profiles
 
 ### Database Backup & Recovery System (January 9, 2025)
 - ✅ Added complete database backup and restore functionality in administration panel