feat: replace prompt-based document rejection with a dedicated modal interface

src/app/admin/kyc/[id]/page.tsx

@@ -259,6 +259,10 @@ export default function KYCDetailPage() {
   const [showAddDocModal, setShowAddDocModal] = useState(false);
   const [newDocName, setNewDocName] = useState('');
   const [showUploadDocModal, setShowUploadDocModal] = useState(false);
+
+  const [showRejectDocModal, setShowRejectDocModal] = useState(false);
+  const [rejectDocId, setRejectDocId] = useState<string | null>(null);
+  const [rejectReason, setRejectReason] = useState('');
   const [uploadDocId, setUploadDocId] = useState<string | null>(null);
 
   useEffect(() => {
@@ -333,16 +337,24 @@ export default function KYCDetailPage() {
     } : null);
   };
 
-  const handleRejectDocument = (docId: string) => {
+  const openRejectDocModal = (docId: string) => {
-    const reason = prompt('Enter rejection reason:');
+    setRejectDocId(docId);
-    if (reason) {
+    setRejectReason('');
+    setShowRejectDocModal(true);
+  };
+
+  const handleRejectDocument = () => {
+    if (!request || !rejectDocId || !rejectReason.trim()) return;
     setRequest(prev => prev ? {
       ...prev,
       requiredDocuments: prev.requiredDocuments.map(doc =>
-          doc.id === docId ? { ...doc, status: 'rejected' as const, rejectedReason: reason } : doc
+        doc.id === rejectDocId ? { ...doc, status: 'rejected' as const, rejectedReason: rejectReason } : doc
       )
     } : null);
-    }
+    setShowRejectDocModal(false);
+    setRejectDocId(null);
+    setRejectReason('');
+    toast.success('Document rejected');
   };
 
   const handleUploadDocument = (e: React.ChangeEvent<HTMLInputElement>) => {
@@ -654,11 +666,14 @@ export default function KYCDetailPage() {
                       {doc.status === 'uploaded' && (
                         <>
                           <button onClick={() => handleApproveDocument(doc.id)} className="p-1 bg-green-100 text-green-600 rounded hover:bg-green-200" title="Approve"><CheckCircle className="w-4 h-4" /></button>
-                          <button onClick={() => handleRejectDocument(doc.id)} className="p-1 bg-red-100 text-red-600 rounded hover:bg-red-200" title="Reject"><XCircle className="w-4 h-4" /></button>
+                          <button onClick={() => openRejectDocModal(doc.id)} className="p-1 bg-red-100 text-red-600 rounded hover:bg-red-200" title="Reject"><XCircle className="w-4 h-4" /></button>
                         </>
                       )}
                       {doc.status === 'approved' && <span className="text-xs px-2 py-1 bg-green-100 text-green-700 rounded-full">Approved</span>}
                       {doc.status === 'rejected' && <span className="text-xs px-2 py-1 bg-red-100 text-red-700 rounded-full">Rejected</span>}
+                      {doc.status === 'rejected' && doc.rejectedReason && (
+                        <div className="text-xs text-red-600 mt-1 italic">Reason: {doc.rejectedReason}</div>
+                      )}
                       {doc.status === 'pending' && <span className="text-xs px-2 py-1 bg-amber-100 text-amber-700 rounded-full">Pending</span>}
                     </div>
                   </div>
@@ -826,6 +841,31 @@ export default function KYCDetailPage() {
           </div>
         </div>
       )}
+
+      {showRejectDocModal && (
+        <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4">
+          <div className="bg-white rounded-xl shadow-xl w-full max-w-md">
+            <div className="p-4 border-b border-slate-100 flex justify-between items-center">
+              <h3 className="font-semibold text-red-600">Reject Document</h3>
+              <button onClick={() => setShowRejectDocModal(false)} className="text-slate-400 hover:text-slate-600">×</button>
+            </div>
+            <div className="p-4">
+              <label className="text-sm font-medium text-slate-600 mb-2 block">Rejection Reason</label>
+              <textarea
+                value={rejectReason}
+                onChange={(e) => setRejectReason(e.target.value)}
+                className="w-full px-3 py-2 border border-slate-200 rounded-lg text-sm"
+                rows={4}
+                placeholder="Enter reason for rejection..."
+              />
+            </div>
+            <div className="p-4 border-t border-slate-100 flex justify-end gap-2">
+              <button onClick={() => setShowRejectDocModal(false)} className="px-4 py-2 border border-slate-200 text-slate-600 rounded-lg">Cancel</button>
+              <button onClick={handleRejectDocument} disabled={!rejectReason.trim()} className="px-4 py-2 bg-red-600 text-white rounded-lg disabled:opacity-50">Reject</button>
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   );
 }