feat: complete UI tasks, backend optimizations, coupon admin, user kundli

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

@@ -93,15 +93,15 @@ export default function AttemptHistoryPage({ params }: { params: Promise<{ attem
           <p className="text-muted-foreground">Review your performance, detailed solutions, and identify your weak spots.</p>
         </div>
         
-        <div className="flex gap-4">
-          <Card className="bg-secondary/30 border-border min-w-32">
+        <div className="flex gap-4 w-full md:w-auto">
+          <Card className="bg-secondary/30 border-border flex-1 md:min-w-48">
             <CardContent className="p-4 flex flex-col items-center justify-center">
               <Award className="text-[#00F0FF] mb-2" size={24} />
               <div className="text-sm text-muted-foreground font-bold uppercase">Score</div>
               <div className="text-2xl font-bold">{scoreCalc} <span className="text-sm text-muted-foreground">/ {maxScore}</span></div>
             </CardContent>
           </Card>
-          <Card className="bg-secondary/30 border-border min-w-32">
+          <Card className="bg-secondary/30 border-border flex-1 md:min-w-48">
             <CardContent className="p-4 flex flex-col items-center justify-center">
               <Clock className="text-primary mb-2" size={24} />
               <div className="text-sm text-muted-foreground font-bold uppercase">Time Taken</div>

src/app/dashboard/cbt/page.tsx

@@ -16,6 +16,7 @@ interface TestData {
   total_time: number;
   difficulty: string;
   scheduled_date?: string;
+  end_date?: string;
 }
 
 export default function CBTPage() {
@@ -26,29 +27,45 @@ export default function CBTPage() {
   const [attempts, setAttempts] = useState<any[]>([]);
   const [showUpgradeModal, setShowUpgradeModal] = useState(false);
   const [showAllExams, setShowAllExams] = useState(false);
+  const [selectedPattern, setSelectedPattern] = useState<string>("");
+  const [dateFilter, setDateFilter] = useState("");
 
   const { userId, user, hasAccessTo, loading: userLoading } = useActiveUser();
 
   useEffect(() => {
     if (userLoading || !userId) return;
 
-    async function loadCBTExams() {
+    async function loadUser() {
       try {
-        // 1. Fetch user target exam
         const userRes = await fetch(`/api/users/${userId}`);
         if (!userRes.ok) throw new Error("Failed to load user target exam");
         const userData = await userRes.json();
         const pattern = userData.target_exam;
         setTargetExam(pattern === "NEET" ? "NEET" : pattern === "JEE_Advanced" ? "JEE Advanced" : "JEE Main");
+        
+        // Only set the initial pattern if it hasn't been changed by the user
+        if (!selectedPattern) {
+          setSelectedPattern(pattern);
+        }
+      } catch (err) {
+        console.error("Error loading user:", err);
+      }
+    }
+    loadUser();
+  }, [userId, userLoading]);
 
-        // 2. Fetch tests filtered by exam
-        const testRes = await fetch(`/api/tests?exam_pattern=${pattern}&user_id=${userId}`);
+  useEffect(() => {
+    if (!userId || !selectedPattern) return;
+
+    async function loadTests() {
+      setLoading(true);
+      try {
+        const testRes = await fetch(`/api/tests?exam_pattern=${selectedPattern}&user_id=${userId}`);
         if (testRes.ok) {
           const testsData = await testRes.json();
           setExams(testsData);
         }
 
-        // 3. Fetch user attempts
         const attemptsRes = await fetch(`/api/users/${userId}/attempts`);
         if (attemptsRes.ok) {
           const attemptsData = await attemptsRes.json();
@@ -60,12 +77,21 @@ export default function CBTPage() {
         setLoading(false);
       }
     }
-    loadCBTExams();
-  }, [userId, userLoading]);
+    loadTests();
+  }, [userId, selectedPattern]);
 
-  const filteredExams = exams.filter(exam =>
-    exam.title.toLowerCase().includes(search.toLowerCase())
-  );
+  const filteredExams = exams.filter(exam => {
+    const matchesSearch = exam.title.toLowerCase().includes(search.toLowerCase());
+    if (!matchesSearch) return false;
+    
+    if (dateFilter) {
+      if (!exam.scheduled_date) return false;
+      const scheduledDate = new Date(exam.scheduled_date).toISOString().split('T')[0];
+      if (scheduledDate !== dateFilter) return false;
+    }
+    
+    return true;
+  });
 
   const formatDate = (dateStr: string) => {
     return new Date(dateStr).toLocaleDateString("en-US", { year: 'numeric', month: 'short', day: 'numeric' });
@@ -73,6 +99,9 @@ export default function CBTPage() {
 
   // Get the highest score for each test if attempted multiple times
   const attemptsByTest = attempts.reduce((acc, curr) => {
+    // Isolate analytics to first attempt only - ignore retakes
+    if (curr.is_retake) return acc;
+
     if (!acc[curr.source_id] || acc[curr.source_id].score < curr.score) {
       acc[curr.source_id] = curr;
     }
@@ -88,18 +117,45 @@ export default function CBTPage() {
             Real exam environment simulations to conquer {targetExam || "NEET/JEE"}.
           </p>
         </div>
-        <div className="relative w-64">
-          <Search className="absolute left-3 top-1/2 -translate-y-1/2 text-muted-foreground" size={16} />
-          <input
-            type="text"
-            placeholder="Search exams..."
-            value={search}
-            onChange={(e) => setSearch(e.target.value)}
-            className="w-full pl-10 pr-4 py-2 bg-background border border-border rounded-xl text-sm focus:ring-2 focus:ring-[#00F0FF] outline-none"
-          />
+        <div className="flex flex-col sm:flex-row gap-3">
+          <div className="relative w-full sm:w-48">
+            <input
+              type="date"
+              value={dateFilter}
+              onChange={(e) => setDateFilter(e.target.value)}
+              className="w-full px-4 py-2 bg-background border border-border rounded-xl text-sm focus:ring-2 focus:ring-[#00F0FF] outline-none text-muted-foreground"
+            />
+          </div>
+          <div className="relative w-full sm:w-64">
+            <Search className="absolute left-3 top-1/2 -translate-y-1/2 text-muted-foreground" size={16} />
+            <input
+              type="text"
+              placeholder="Search exams..."
+              value={search}
+              onChange={(e) => setSearch(e.target.value)}
+              className="w-full pl-10 pr-4 py-2 bg-background border border-border rounded-xl text-sm focus:ring-2 focus:ring-[#00F0FF] outline-none"
+            />
+          </div>
         </div>
       </div>
 
+      <div className="flex gap-3 overflow-x-auto pb-2 scrollbar-hide">
+        {["JEE_MAIN", "JEE_ADVANCED", "NEET"].map(p => {
+          // Normalize to match db/backend pattern
+          const dbPattern = p === "JEE_MAIN" ? "JEE_Main" : p === "JEE_ADVANCED" ? "JEE_Advanced" : "NEET";
+          return (
+            <Button
+              key={p}
+              variant={selectedPattern === dbPattern ? "default" : "outline"}
+              onClick={() => setSelectedPattern(dbPattern)}
+              className="rounded-full shadow-sm"
+            >
+              {p === "JEE_MAIN" ? "JEE Main" : p === "JEE_ADVANCED" ? "JEE Advanced" : "NEET"}
+            </Button>
+          )
+        })}
+      </div>
+
       <div className="space-y-6">
         <h2 className="text-xl font-bold border-b border-border pb-2 flex items-center gap-2">
           <Clock size={20} className="text-[#00F0FF]" /> Upcoming & Active Exams
@@ -122,10 +178,12 @@ export default function CBTPage() {
                 // Date logic
                 const now = new Date();
                 const scheduledTime = exam.scheduled_date ? new Date(exam.scheduled_date) : now;
+                const endTime = exam.end_date ? new Date(exam.end_date) : null;
                 const isUpcoming = scheduledTime > now;
+                const isExpired = endTime ? now > endTime : false;
                 
                 return (
-                <Card key={exam.id} className={`hover:border-[#00F0FF]/50 hover:shadow-[0_0_15px_-5px_#00F0FF] transition-all group ${isAttempted ? 'border-primary/20' : ''} ${isLocked ? 'opacity-80' : ''}`}>
+                <Card key={exam.id} className={`hover:border-[#00F0FF]/50 hover:shadow-[0_0_15px_-5px_#00F0FF] transition-all group ${isAttempted ? 'border-primary/20' : ''} ${isLocked || isExpired ? 'opacity-80' : ''}`}>
                   <CardContent className="p-6">
                     <div className="flex justify-between items-start mb-4">
                       <div className="flex gap-2 flex-wrap">
@@ -146,6 +204,10 @@ export default function CBTPage() {
                         <Badge variant="outline" className="bg-red-500/10 text-red-500 border-red-500/20 flex items-center gap-1">
                           <Lock size={12} /> Premium
                         </Badge>
+                      ) : isExpired ? (
+                        <Badge variant="outline" className="bg-muted text-muted-foreground border-muted-foreground/30">
+                          Expired
+                        </Badge>
                       ) : isAttempted ? (
                         <Badge variant="secondary" className="bg-green-500/10 text-green-500 border-green-500/20">
                           Attempted
@@ -157,7 +219,7 @@ export default function CBTPage() {
                     </h3>
                     <div className="text-sm text-muted-foreground space-y-1 mb-6">
                       <div className="font-medium text-foreground">
-                        {isUpcoming ? `Available on ${formatDate(exam.scheduled_date!)}` : 'Available Now'}
+                        {isUpcoming ? `Available on ${formatDate(exam.scheduled_date!)}` : isExpired ? `Expired on ${formatDate(exam.end_date!)}` : 'Available Now'}
                       </div>
                       <div>{exam.total_time} Min • {exam.difficulty} Difficulty</div>
                     </div>
@@ -173,10 +235,29 @@ export default function CBTPage() {
                       >
                         <Lock size={16} /> Unlock Test
                       </Button>
+                    ) : isExpired && !isAttempted ? (
+                      <Button disabled className="w-full gap-2 rounded-xl bg-secondary/50 text-muted-foreground border border-border font-bold">
+                        Expired
+                      </Button>
+                    ) : isAttempted ? (
+                      <div className="flex gap-2">
+                        <Link href={`/cbt/${exam.id}/result`} className="flex-1">
+                          <Button className="w-full gap-2 rounded-xl bg-secondary border border-border text-foreground hover:bg-secondary/80 font-bold">
+                            <PlayCircle size={16} /> Result
+                          </Button>
+                        </Link>
+                        {!isExpired && (
+                          <Link href={`/cbt/${exam.id}`} className="flex-1">
+                            <Button className="w-full gap-2 rounded-xl bg-[#00F0FF]/10 border border-[#00F0FF]/30 text-[#00F0FF] hover:bg-[#00F0FF]/20 font-bold">
+                              Retake
+                            </Button>
+                          </Link>
+                        )}
+                      </div>
                     ) : (
-                      <Link href={isAttempted ? `/cbt/${exam.id}/result` : `/cbt/${exam.id}`}>
-                        <Button className={`w-full gap-2 rounded-xl transition-colors font-bold ${isAttempted ? 'bg-secondary border border-border text-foreground hover:bg-secondary/80' : 'bg-secondary text-foreground hover:bg-[#00F0FF] hover:text-background'}`}>
-                          <PlayCircle size={16} /> {isAttempted ? 'View Result' : 'Start Exam'}
+                      <Link href={`/cbt/${exam.id}`}>
+                        <Button className="w-full gap-2 rounded-xl bg-secondary text-foreground hover:bg-[#00F0FF] hover:text-background font-bold transition-colors">
+                          <PlayCircle size={16} /> Start Exam
                         </Button>
                       </Link>
                     )}
@@ -207,10 +288,12 @@ export default function CBTPage() {
                     // Date logic
                     const now = new Date();
                     const scheduledTime = exam.scheduled_date ? new Date(exam.scheduled_date) : now;
+                    const endTime = exam.end_date ? new Date(exam.end_date) : null;
                     const isUpcoming = scheduledTime > now;
+                    const isExpired = endTime ? now > endTime : false;
                     
                     return (
-                    <Card key={exam.id} className={`hover:border-[#00F0FF]/50 hover:shadow-[0_0_15px_-5px_#00F0FF] transition-all group ${isAttempted ? 'border-primary/20' : ''} ${isLocked ? 'opacity-80' : ''}`}>
+                    <Card key={exam.id} className={`hover:border-[#00F0FF]/50 hover:shadow-[0_0_15px_-5px_#00F0FF] transition-all group ${isAttempted ? 'border-primary/20' : ''} ${isLocked || isExpired ? 'opacity-80' : ''}`}>
                       <CardContent className="p-6">
                         <div className="flex justify-between items-start mb-4">
                           <div className="flex gap-2 flex-wrap">
@@ -231,6 +314,10 @@ export default function CBTPage() {
                             <Badge variant="outline" className="bg-red-500/10 text-red-500 border-red-500/20 flex items-center gap-1">
                               <Lock size={12} /> Premium
                             </Badge>
+                          ) : isExpired ? (
+                            <Badge variant="outline" className="bg-muted text-muted-foreground border-muted-foreground/30">
+                              Expired
+                            </Badge>
                           ) : isAttempted ? (
                             <Badge variant="secondary" className="bg-green-500/10 text-green-500 border-green-500/20">
                               Attempted
@@ -242,7 +329,7 @@ export default function CBTPage() {
                         </h3>
                         <div className="text-sm text-muted-foreground space-y-1 mb-6">
                           <div className="font-medium text-foreground">
-                            {isUpcoming ? `Available on ${formatDate(exam.scheduled_date!)}` : 'Available Now'}
+                            {isUpcoming ? `Available on ${formatDate(exam.scheduled_date!)}` : isExpired ? `Expired on ${formatDate(exam.end_date!)}` : 'Available Now'}
                           </div>
                           <div>{exam.total_time} Min • {exam.difficulty} Difficulty</div>
                         </div>
@@ -258,10 +345,29 @@ export default function CBTPage() {
                           >
                             <Lock size={16} /> Unlock Test
                           </Button>
+                        ) : isExpired && !isAttempted ? (
+                          <Button disabled className="w-full gap-2 rounded-xl bg-secondary/50 text-muted-foreground border border-border font-bold">
+                            Expired
+                          </Button>
+                        ) : isAttempted ? (
+                          <div className="flex gap-2">
+                            <Link href={`/cbt/${exam.id}/result`} className="flex-1">
+                              <Button className="w-full gap-2 rounded-xl bg-secondary border border-border text-foreground hover:bg-secondary/80 font-bold">
+                                <PlayCircle size={16} /> Result
+                              </Button>
+                            </Link>
+                            {!isExpired && (
+                              <Link href={`/cbt/${exam.id}`} className="flex-1">
+                                <Button className="w-full gap-2 rounded-xl bg-[#00F0FF]/10 border border-[#00F0FF]/30 text-[#00F0FF] hover:bg-[#00F0FF]/20 font-bold">
+                                  Retake
+                                </Button>
+                              </Link>
+                            )}
+                          </div>
                         ) : (
-                          <Link href={isAttempted ? `/cbt/${exam.id}/result` : `/cbt/${exam.id}`}>
-                            <Button className={`w-full gap-2 rounded-xl transition-colors font-bold ${isAttempted ? 'bg-secondary border border-border text-foreground hover:bg-secondary/80' : 'bg-secondary text-foreground hover:bg-[#00F0FF] hover:text-background'}`}>
-                              <PlayCircle size={16} /> {isAttempted ? 'View Result' : 'Start Exam'}
+                          <Link href={`/cbt/${exam.id}`}>
+                            <Button className="w-full gap-2 rounded-xl bg-secondary text-foreground hover:bg-[#00F0FF] hover:text-background font-bold transition-colors">
+                              <PlayCircle size={16} /> Start Exam
                             </Button>
                           </Link>
                         )}