feat: implement calendar invitation system with creation, acceptance, and management features

src/i18n/en.json

@@ -408,7 +408,11 @@
     "roomDetails": "Room Details",
     "joinUrl": "Join URL",
     "roomDeleted": "Deleted",
-    "roomDeletedNotice": "This room has been deleted by the owner on the origin instance and is no longer available."
+    "roomDeletedNotice": "This room has been deleted by the owner on the origin instance and is no longer available.",
+    "calendarEvent": "Calendar Invitation",
+    "calendarAccepted": "Calendar event accepted and added to your calendar!",
+    "invitationRemoved": "Invitation removed",
+    "removeInvitation": "Remove invitation"
   },
   "calendar": {
     "title": "Calendar",
@@ -456,9 +460,9 @@
     "shareFailed": "Could not share event",
     "sendFederated": "Send to remote",
     "sendFederatedTitle": "Send Event to Remote Instance",
-    "sendFederatedDesc": "Send this calendar event to a user on another Redlight instance.",
+    "sendFederatedDesc": "Send this calendar event to a user on another Redlight instance. The recipient must accept the invitation before the event appears in their calendar.",
     "send": "Send",
-    "fedSent": "Event sent to remote instance!",
+    "fedSent": "Calendar invitation sent! The recipient must accept it first.",
     "fedFailed": "Could not send event to remote instance",
     "openRoom": "Open linked room",
     "organizer": "Organizer",