fix: gantt route sync

src/helpers/time/isoToKebabDate.ts

@@ -1,8 +1,16 @@
-import {format} from 'date-fns'
-import {DATEFNS_DATE_FORMAT_KEBAB} from '@/constants/date' 
 import type {DateISO} from '@/types/DateISO'
 import type {DateKebab} from '@/types/DateKebab'
 
+// ✅ Format a date to YYYY-MM-DD (or any other format)
+function padTo2Digits(num: number) {
+  return num.toString().padStart(2, '0')
+}
+
 export function isoToKebabDate(isoDate: DateISO) {
-	return format(new Date(isoDate), DATEFNS_DATE_FORMAT_KEBAB) as DateKebab
+	const date = new Date(isoDate)
+	return [
+		date.getFullYear(),
+		padTo2Digits(date.getMonth() + 1), // January is 0, but we want it to be 1
+		padTo2Digits(date.getDate()),
+	].join('-') as DateKebab
 }

src/helpers/time/parseDateProp.ts

@@ -22,7 +22,7 @@ export function parseDateProp(kebabDate: DateKebab | undefined): string | undefi
 		if (!dateValuesAreValid) {
 			throw new Error('Invalid date values')
 		}
-		return new Date(year, month, date).toISOString() as DateISO
+		return new Date(year, month - 1, date).toISOString() as DateISO
 	} catch(e) {
 		// ignore nonsense route queries
 		return