Added category creation interface

models/Category.ts

@@ -2,13 +2,15 @@ import { z } from "zod"
 import type { RPGColor } from "./Color"
 
 export interface Category {
-  id: number
+  id?: number
   name: string
   color?: RPGColor
 }
 
 export const categorySchema = z.object({
-  id: z.number().int(),
-  name: z.string(),
-  color: z.string().default("black"),
+  category: z.object({
+    name: z.string(),
+    color: z.string().default("black"),
+  }),
+  calendarId: z.number({ coerce: true }).int().positive()
 })