Enable the recording of sales with multiple products at the same time

Implements a new form component `NewSaleFormMultiProduct.tsx` with React Hook Form and Zod for multi-product sales and replaces the old form.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: c7151ec8-4e6b-4fcf-b628-65b094ac18fd

client/src/pages/Dashboard.tsx

@@ -5,7 +5,7 @@ import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { useAuth } from "@/hooks/useAuth";
 import { StoreProvider, useStoreContext } from "@/hooks/useStoreContext";
-import NewSaleForm from "@/components/NewSaleForm";
+import NewSaleFormMultiProduct from "@/components/NewSaleFormMultiProduct";
 import SalesHistory from "@/components/SalesHistory";
 import Administration from "@/components/Administration";
 import { Package, History, Settings, LogOut, User, Building2, Shield } from "lucide-react";
@@ -146,7 +146,7 @@ function DashboardContent() {
 
             <TabsContent value="new-sale" className="mt-8">
               <div className="slide-in-up">
-                <NewSaleForm />
+                <NewSaleFormMultiProduct />
               </div>
             </TabsContent>