Added day selection and revamped modal structure

models/CalendarConfig.ts

@@ -1,6 +1,6 @@
 import { z } from 'zod'
 import type { CalendarEvent } from "./CalendarEvent"
-import { type CalendarMonth } from "./CalendarMonth"
+import { calendarMonthSchema, type CalendarMonth } from "./CalendarMonth"
 import { dateSchema, type RPGDate } from "./Date"
 
 export interface CalendarConfig {
@@ -19,5 +19,6 @@ export const postCalendarSchema = z.object({
   name: z.string(),
   today: dateSchema.optional().nullable(),
   color: z.string().optional().nullable(),
+  months: z.array(calendarMonthSchema).min(1),
   worldId: z.number().int(),
 })