Add a thin grey border around validation icons

Apply a border to various check and check circle icons across different modals and pages to visually distinguish them.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: b163d4c0-de5e-4f4e-a9c0-aed4c7049718
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/b163d4c0-de5e-4f4e-a9c0-aed4c7049718/93Mucz1

client/src/components/modals/OrderDetailModal.tsx

@@ -394,7 +394,7 @@ export default function OrderDetailModal({
                 disabled={validateOrderMutation.isPending}
                 className="bg-green-600 hover:bg-green-700"
               >
-                <CheckCircle className="w-4 h-4 mr-2" />
+                <CheckCircle className="w-4 h-4 mr-2 border border-gray-300 rounded p-0.5" />
                 {validateOrderMutation.isPending ? 'Validation...' : 'Valider Commande'}
               </Button>
             )}
@@ -404,7 +404,7 @@ export default function OrderDetailModal({
                 onClick={handleValidateDelivery}
                 className="bg-secondary hover:bg-green-700"
               >
-                <Check className="w-4 h-4 mr-2" />
+                <Check className="w-4 h-4 mr-2 border border-gray-300 rounded p-0.5" />
                 Valider livraison
               </Button>
             )}