Update the application description on the dashboard and login pages

Updates the description text in `Dashboard.tsx` and `Login.tsx` to "Registre des ventes des Feux d'artifice".

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-26c014852236/75b569d4-1b21-43d8-b5b1-0816d59edebd.jpg

client/src/pages/Dashboard.tsx

@@ -52,7 +52,7 @@ function DashboardContent() {
               </div>
               <div>
                 <h1 className="text-xl font-bold gradient-text">RegisFlow</h1>
-                <p className="text-sm text-muted-foreground">Gestion moderne des feux d'artifice</p>
+                <p className="text-sm text-muted-foreground">Registre des ventes des Feux d'artifice</p>
               </div>
             </div>
             

client/src/pages/Login.tsx

@@ -70,7 +70,7 @@ export default function Login() {
           </div>
           <div className="space-y-2">
             <CardTitle className="text-3xl font-bold gradient-text">RegisFlow</CardTitle>
-            <p className="text-muted-foreground text-lg">Gestion moderne des feux d'artifice</p>
+            <p className="text-muted-foreground text-lg">Registre des ventes des Feux d'artifice</p>
           </div>
         </CardHeader>
         <CardContent className="space-y-6">