🏷️(front) add Scheduler types

Add TypeScript type definitions for Scheduler component
including event props, modal states, and handler signatures.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/frontend/apps/calendars/src/features/calendar/components/scheduler/types.ts

@@ -0,0 +1,80 @@
+/**
+ * Type definitions for Scheduler components.
+ */
+
+import type { IcsEvent, IcsRecurrenceRule } from "ts-ics";
+import type { CalDavCalendar } from "../../services/dav/types/caldav-service";
+import type { EventCalendarAdapter } from "../../services/dav/EventCalendarAdapter";
+
+/**
+ * Options for deleting recurring events.
+ */
+export type RecurringDeleteOption = 'this' | 'future' | 'all';
+
+/**
+ * Props for the EventModal component.
+ */
+export interface EventModalProps {
+  isOpen: boolean;
+  mode: "create" | "edit";
+  event: Partial<IcsEvent> | null;
+  calendarUrl: string;
+  calendars: CalDavCalendar[];
+  adapter: EventCalendarAdapter;
+  onSave: (event: IcsEvent, calendarUrl: string) => Promise<void>;
+  onDelete?: (
+    event: IcsEvent,
+    calendarUrl: string,
+    option?: RecurringDeleteOption
+  ) => Promise<void>;
+  onRespondToInvitation?: (
+    event: IcsEvent,
+    status: 'ACCEPTED' | 'TENTATIVE' | 'DECLINED'
+  ) => Promise<void>;
+  onClose: () => void;
+}
+
+/**
+ * Props for the DeleteEventModal component.
+ */
+export interface DeleteEventModalProps {
+  isOpen: boolean;
+  isRecurring: boolean;
+  onConfirm: (option?: RecurringDeleteOption) => void;
+  onCancel: () => void;
+}
+
+/**
+ * Props for the main Scheduler component.
+ */
+export interface SchedulerProps {
+  defaultCalendarUrl?: string;
+}
+
+/**
+ * State for the event modal.
+ */
+export interface EventModalState {
+  isOpen: boolean;
+  mode: "create" | "edit";
+  event: Partial<IcsEvent> | null;
+  calendarUrl: string;
+  eventUrl?: string;
+  etag?: string;
+}
+
+/**
+ * Form state for the event modal.
+ */
+export interface EventFormState {
+  title: string;
+  description: string;
+  location: string;
+  startDateTime: string;
+  endDateTime: string;
+  selectedCalendarUrl: string;
+  isAllDay: boolean;
+  recurrence: IcsRecurrenceRule | undefined;
+  showRecurrence: boolean;
+  showAttendees: boolean;
+}