fix: bulk attendance fill — accept string user_ids, skip holidays

- Schema now accepts both string and number user_ids (frontend sends strings)
- Bulk fill now skips Czech public holidays in addition to weekends

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/schemas/attendance.schema.ts

@@ -39,7 +39,9 @@ export const AttendanceBalancesSchema = z.object({
 
 export const AttendanceBulkSchema = z.object({
   month: z.string().regex(/^\d{4}-\d{2}$/, "Měsíc je povinný (formát YYYY-MM)"),
-  user_ids: z.array(z.number()).min(1, "Vyberte alespoň jednoho zaměstnance"),
+  user_ids: z
+    .array(z.union([z.number(), z.string()]).transform((v) => Number(v)))
+    .min(1, "Vyberte alespoň jednoho zaměstnance"),
   arrival_time: z.string().optional().default("08:00"),
   departure_time: z.string().optional().default("16:30"),
   break_start_time: z.string().optional().default("12:00"),

src/services/attendance.service.ts

@@ -1,6 +1,6 @@
 import { attendance_leave_type, Prisma } from "@prisma/client";
 import prisma from "../config/database";
-import { getBusinessDaysInMonth } from "../utils/czech-holidays";
+import { getBusinessDaysInMonth, isHoliday } from "../utils/czech-holidays";
 import { localDateStr } from "../utils/date";
 import { getSystemSettings } from "./system-settings";
 
@@ -1087,6 +1087,7 @@ export async function bulkCreateAttendance(data: BulkAttendanceData) {
       const dow = date.getDay();
 
       if (dow === 0 || dow === 6) continue;
+      if (isHoliday(dateStr)) continue;
 
       if (existingSet.has(`${userId}:${dateStr}`)) {
         skipped++;