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

src/app/admin/tests/page.tsx

@@ -41,6 +41,7 @@ export default function AdminTestsPage() {
   
   // Upload Form State
   const [title, setTitle] = useState("")
+  const [testType, setTestType] = useState("CBT")
   const [examPattern, setExamPattern] = useState("JEE_Main")
   const [timeLimit, setTimeLimit] = useState("180")
   const [scheduledDate, setScheduledDate] = useState<Date | null>(null)
@@ -180,6 +181,7 @@ export default function AdminTestsPage() {
     
     const payload = {
       title,
+      type: testType,
       exam_pattern: examPattern,
       time_limit: parseInt(timeLimit),
       admin_id: userId,
@@ -236,6 +238,27 @@ export default function AdminTestsPage() {
                 <label className="text-sm font-medium">Test Title</label>
                 <Input required value={title} onChange={e => setTitle(e.target.value)} placeholder="e.g. JEE Main Mock Test 1" />
               </div>
+
+              {/* TEST TYPE — KEY DIFFERENTIATOR */}
+              <div className="space-y-2">
+                <label className="text-sm font-medium flex items-center gap-2">
+                  Test Type
+                  <span className="text-[10px] text-muted-foreground font-normal">(determines which section it appears in)</span>
+                </label>
+                <select
+                  className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2"
+                  value={testType}
+                  onChange={(e) => setTestType(e.target.value)}
+                >
+                  <option value="CBT">🎯 CBT Mock Test — appears in Mock Tests section</option>
+                  <option value="DPS">📋 DPP (Daily Practice) — appears in PrepPilot AI section</option>
+                </select>
+                <p className="text-[11px] text-muted-foreground">
+                  {testType === 'CBT'
+                    ? '✅ This will appear under Dashboard → Mock Tests (CBT) for students to attempt.'
+                    : '✅ This will appear under AI Coach → PrepPilot AI as a DPP with full CBT interface.'}
+                </p>
+              </div>
               
               <div className="space-y-2">
                 <label className="text-sm font-medium">Exam Pattern</label>

src/app/cbt/[examId]/page.tsx

@@ -316,6 +316,7 @@ export default function CBTExamPage({ params }: { params: Promise<{ examId: stri
       <ExamResult 
         payload={payload} 
         attemptId={attemptId}
+        examType={examType}
         onRetake={examType === 'DPS' ? () => {
           resetExamState();
           window.location.reload();

src/app/dashboard/cbt/history/[attemptId]/page.tsx

@@ -62,6 +62,10 @@ export default function AttemptHistoryPage({ params }: { params: Promise<{ attem
     fetchHistoryData();
   }, [attemptId, userId]);
 
+  // Smart back route based on test type
+  const backRoute = test?.type === 'DPS' ? '/dashboard/ai-coach/cbt-dpp' : '/dashboard/cbt';
+  const backLabel = test?.type === 'DPS' ? '← Back to PrepPilot AI' : '← Back to Tests';
+
   if (loading) {
     return (
       <div className="flex h-screen items-center justify-center">
@@ -83,8 +87,8 @@ export default function AttemptHistoryPage({ params }: { params: Promise<{ attem
 
   return (
     <div className="max-w-6xl mx-auto p-8 animate-in fade-in slide-in-from-bottom-4 duration-500">
-      <Link href="/dashboard/cbt" className="inline-flex items-center text-sm text-muted-foreground hover:text-foreground mb-6 transition-colors">
-        <ArrowLeft size={16} className="mr-2" /> Back to Tests
+      <Link href={backRoute} className="inline-flex items-center text-sm text-muted-foreground hover:text-foreground mb-6 transition-colors">
+        <ArrowLeft size={16} className="mr-2" /> {test?.type === 'DPS' ? 'Back to PrepPilot AI' : 'Back to Tests'}
       </Link>
       
       <div className="flex flex-col md:flex-row gap-8 mb-10">