Simplify new sale form by removing the title and descriptive text

Remove the CardHeader component from NewSaleForm.tsx to streamline the interface.

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

client/src/components/NewSaleForm.tsx

@@ -162,18 +162,7 @@ export default function NewSaleForm() {
 
   return (
     <Card className="modern-card-elevated">
-      <CardHeader className="mobile-card-header">
-        <CardTitle className="flex items-center gap-2 sm:gap-3 responsive-title">
-          <div className="p-1.5 sm:p-2 bg-gradient-to-br from-green-500 to-emerald-600 rounded-lg sm:rounded-xl">
-            <Package className="h-5 w-5 sm:h-6 sm:w-6 text-white" />
-          </div>
-          <span className="truncate">Nouvelle Vente</span>
-        </CardTitle>
-        <p className="text-muted-foreground mt-2 responsive-body">
-          Enregistrement d'une vente de feux d'artifice
-        </p>
-      </CardHeader>
-      <CardContent className="mobile-card-content">
+      <CardContent className="mobile-card-content pt-6">
         <Form {...form}>
           <form onSubmit={form.handleSubmit(onSubmit)} className="mobile-form-responsive">
             {/* Seller Information */}