update

frontend/src/components/ParticipantManager.tsx

@@ -3,9 +3,15 @@ import { Participant } from '@/types/calendar';
 import { Input } from '@/components/ui/input';
 import { Button } from '@/components/ui/button';
 import { Label } from '@/components/ui/label';
-import { UserPlus, Trash2, User, Pencil, Check, X, AlertCircle } from 'lucide-react';
+import { UserPlus, Trash2, User, Pencil, Check, X, AlertCircle, Info } from 'lucide-react';
 import { useToast } from '@/hooks/use-toast';
-import { getAvatarColor } from '@/lib/utils';
+import { getAvatarColor, getCalendarNameFromUrl } from '@/lib/utils';
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from '@/components/ui/tooltip';
 
 interface ParticipantManagerProps {
   participants: Participant[];
@@ -236,9 +242,19 @@ export const ParticipantManager = ({
                           <span>{participant.email}</span>
                           <span className="text-muted-foreground/60">•</span>
                           {participant.icsLink ? (
-                            <span className="text-primary truncate max-w-[200px]" title={participant.icsLink}>
-                              ICS linked
-                            </span>
+                            <TooltipProvider>
+                              <Tooltip>
+                                <TooltipTrigger asChild>
+                                  <span className="text-primary truncate max-w-[200px] cursor-help flex items-center gap-1" title={participant.icsLink}>
+                                    📅 {getCalendarNameFromUrl(participant.icsLink) || 'Calendar linked'}
+                                    <Info className="w-3 h-3 opacity-50" />
+                                  </span>
+                                </TooltipTrigger>
+                                <TooltipContent side="top" className="max-w-[220px]">
+                                  <p>Availability is based on this calendar only. Other calendars on the same account are not included.</p>
+                                </TooltipContent>
+                              </Tooltip>
+                            </TooltipProvider>
                           ) : (
                             <span className="text-amber-600 flex items-center gap-1">
                               <AlertCircle className="w-3 h-3" />