refactor: remove redundant isRecurring property, use recurrenceRule instead

isRecurring was redundant since recurrenceRule as truthy/falsy check suffices.
Removed from shared CalendarEvent type, Mongoose virtual, and all usages.

apps/client/src/app/(tabs)/calendar.tsx

@@ -203,7 +203,7 @@ const Calendar = () => {
     const occurrenceDate = getDateKey(new Date(event.occurrenceStart));
 
     try {
-      if (event.isRecurring) {
+      if (event.recurrenceRule) {
         // Recurring event: use mode and occurrenceDate
         await EventService.delete(event.id, mode, occurrenceDate);
         // Reload events to reflect changes
@@ -260,7 +260,7 @@ const Calendar = () => {
       <DeleteEventModal
         visible={deleteModalVisible}
         eventTitle={eventToDelete?.title || ""}
-        isRecurring={eventToDelete?.isRecurring || false}
+        isRecurring={!!eventToDelete?.recurrenceRule}
         onConfirm={handleDeleteConfirm}
         onCancel={handleDeleteCancel}
       />

apps/client/src/components/EventCard.tsx

@@ -19,7 +19,7 @@ export const EventCard = ({ event, onEdit, onDelete }: EventCardProps) => {
         startTime={event.occurrenceStart}
         endTime={event.occurrenceEnd}
         description={event.description}
-        isRecurring={event.isRecurring}
+        isRecurring={!!event.recurrenceRule}
       >
         {/* Action buttons - TouchableOpacity with delayPressIn allows ScrollView to detect scroll gestures */}
         <View className="flex-row justify-end mt-3 gap-3">

apps/server/src/repositories/mongo/models/EventModel.ts

@@ -2,22 +2,18 @@ import mongoose, { Schema, Document, Model } from "mongoose";
 import { CalendarEvent } from "@calchat/shared";
 import { IdVirtual } from "./types";
 
-interface EventVirtuals extends IdVirtual {
-  isRecurring: boolean;
-}
-
 export interface EventDocument
-  extends Omit<CalendarEvent, "id" | "isRecurring">,
+  extends Omit<CalendarEvent, "id">,
     Document {
   toJSON(): CalendarEvent;
 }
 
 const EventSchema = new Schema<
   EventDocument,
-  Model<EventDocument, {}, {}, EventVirtuals>,
+  Model<EventDocument, {}, {}, IdVirtual>,
   {},
   {},
-  EventVirtuals
+  IdVirtual
 >(
   {
     userId: {
@@ -61,11 +57,6 @@ const EventSchema = new Schema<
           return this._id.toString();
         },
       },
-      isRecurring: {
-        get() {
-          return !!this.recurrenceRule;
-        },
-      },
     },
     toJSON: {
       virtuals: true,

apps/server/src/services/EventService.ts

@@ -37,8 +37,8 @@ export class EventService {
     const allEvents = await this.eventRepo.findByUserId(userId);
 
     // Separate recurring and non-recurring events
-    const recurringEvents = allEvents.filter((e) => e.isRecurring);
-    const nonRecurringEvents = allEvents.filter((e) => !e.isRecurring);
+    const recurringEvents = allEvents.filter((e) => e.recurrenceRule);
+    const nonRecurringEvents = allEvents.filter((e) => !e.recurrenceRule);
 
     // Expand all events (recurring get multiple instances, non-recurring stay as-is)
     const expanded = expandRecurringEvents(
@@ -90,7 +90,7 @@ export class EventService {
     }
 
     // For non-recurring events, always delete completely
-    if (!event.isRecurring || !event.recurrenceRule) {
+    if (!event.recurrenceRule) {
       await this.eventRepo.delete(id);
       return null;
     }

apps/server/src/utils/recurrenceExpander.ts

@@ -48,7 +48,7 @@ export function expandRecurringEvents(
     // to find events that start before rangeStart but extend into the range
     const adjustedRangeStart = new Date(rangeStart.getTime() - duration);
 
-    if (!event.isRecurring || !event.recurrenceRule) {
+    if (!event.recurrenceRule) {
       // Non-recurring event: add if it overlaps with the range
       if (endTime >= rangeStart && startTime <= rangeEnd) {
         expanded.push({