Update donate button to "Donate Now" and remove cart icon

Modify the primary donate button on the donation page to display "تبرع الآن" (Donate Now) and remove the shopping cart icon.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 1fa9329f-0cec-4a2f-80e8-e26dbae3142e
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 0d89ae2a-f757-4ba0-9f5d-3435ea6a965c
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/4d696b13-86f2-4c9d-be0d-95b293430047/1fa9329f-0cec-4a2f-80e8-e26dbae3142e/jcrlUki
Replit-Helium-Checkpoint-Created: true

artifacts/ehsan-poc/src/pages/donate.tsx

@@ -15,7 +15,7 @@ import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
 import { Card, CardContent } from "@/components/ui/card";
 import { Checkbox } from "@/components/ui/checkbox";
-import { CheckCircle, Heart, Gift, ShoppingCart, Check } from "lucide-react";
+import { CheckCircle, Heart, Gift, Check } from "lucide-react";
 import { Skeleton } from "@/components/ui/skeleton";
 import { getNeedImage } from "../lib/needImages";
 import { Riyal } from "@/components/Riyal";
@@ -299,12 +299,11 @@ export default function Donate() {
               )}
 
               <Button
-                className="w-full gap-2"
+                className="w-full"
                 onClick={goToPayment}
                 data-testid="button-continueToPayment"
               >
-                <ShoppingCart className="w-4 h-4" />
-                {t.donate.continueToPayment}
+                {t.donate.donateNow}
               </Button>
             </CardContent>
           </Card>