fix: smart CBT result/back routing for DPPs and add Test Type selector in Admin panel

src/components/CBT/ExamResult.tsx

@@ -19,11 +19,15 @@ interface ExamAttemptPayload {
 interface ExamResultProps {
   payload: ExamAttemptPayload;
   attemptId: string | null;
+  examType?: string; // 'CBT' or 'DPS'
   onRetake: () => void;
 }
 
-export function ExamResult({ payload, attemptId, onRetake }: ExamResultProps) {
+export function ExamResult({ payload, attemptId, examType, onRetake }: ExamResultProps) {
   const router = useRouter();
+  const isDPP = examType === 'DPS';
+  const backRoute = isDPP ? '/dashboard/ai-coach/cbt-dpp' : '/dashboard/cbt';
+  const backLabel = isDPP ? 'Back to PrepPilot AI' : 'Back to Mock Tests';
   const answered = payload.answers.filter(a => a.selected_answer !== null).length;
   const unanswered = payload.total_questions - answered;
   
@@ -114,7 +118,7 @@ export function ExamResult({ payload, attemptId, onRetake }: ExamResultProps) {
 
         <div className="flex flex-col sm:flex-row gap-4 justify-center pt-8">
           <Button variant="outline" size="lg" className="rounded-xl h-14 px-8 font-bold text-lg gap-2" onClick={onRetake}>
-            <RotateCcw className="size-5" /> Retake Mock Test
+            <RotateCcw className="size-5" /> {isDPP ? 'Retake DPP' : 'Retake Mock Test'}
           </Button>
           {attemptId && (
             <Button 
@@ -146,10 +150,10 @@ export function ExamResult({ payload, attemptId, onRetake }: ExamResultProps) {
               } catch (err) {
                 console.error("Error exiting fullscreen", err);
               }
-              router.push("/dashboard/cbt");
+              router.push(backRoute);
             }}
           >
-            Dashboard <ArrowRight className="size-5" />
+            {backLabel} <ArrowRight className="size-5" />
           </Button>
         </div>