feat: 调整默认排课节奏并限制时间选择

第一节 08:00-09:00，之后从 09:30 起每小时一节至 21:30；排课时间仅可选整点或半点。

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/app/src/utils/schedule-time.ts

@@ -0,0 +1,67 @@
+import {
+  DEFAULT_SCHEDULE_START_TIME,
+  DEFAULT_SCHEDULE_END_TIME,
+  SCHEDULE_MINUTE_STEP,
+} from '@mp-pilates/shared'
+
+function buildHourOptions(): string[] {
+  const startHour = parseInt(DEFAULT_SCHEDULE_START_TIME.slice(0, 2), 10)
+  const endHour = parseInt(DEFAULT_SCHEDULE_END_TIME.slice(0, 2), 10)
+  const list: string[] = []
+  for (let h = startHour; h <= endHour; h++) {
+    list.push(String(h).padStart(2, '0'))
+  }
+  return list
+}
+
+function buildMinuteOptions(): string[] {
+  const list: string[] = []
+  for (let m = 0; m < 60; m += SCHEDULE_MINUTE_STEP) {
+    list.push(String(m).padStart(2, '0'))
+  }
+  return list
+}
+
+export const SCHEDULE_HOUR_OPTIONS = buildHourOptions()
+export const SCHEDULE_MINUTE_OPTIONS = buildMinuteOptions()
+export const SCHEDULE_TIME_PICKER_RANGE = [SCHEDULE_HOUR_OPTIONS, SCHEDULE_MINUTE_OPTIONS]
+
+export function timeToMinutes(time: string): number {
+  const [h, m] = time.split(':').map(Number)
+  return h * 60 + (m || 0)
+}
+
+export function minutesToTime(total: number): string {
+  const h = Math.floor(total / 60)
+  const m = total % 60
+  return `${String(h).padStart(2, '0')}:${String(m).padStart(2, '0')}`
+}
+
+export function timeToPickerIndex(time: string): number[] {
+  let total = timeToMinutes(time || DEFAULT_SCHEDULE_START_TIME)
+  const minTotal = timeToMinutes(DEFAULT_SCHEDULE_START_TIME)
+  const maxTotal = timeToMinutes(DEFAULT_SCHEDULE_END_TIME)
+  total = Math.max(minTotal, Math.min(maxTotal, total))
+  total = Math.round(total / SCHEDULE_MINUTE_STEP) * SCHEDULE_MINUTE_STEP
+  total = Math.max(minTotal, Math.min(maxTotal, total))
+
+  const hour = String(Math.floor(total / 60)).padStart(2, '0')
+  const minute = String(total % 60).padStart(2, '0')
+  return [
+    Math.max(0, SCHEDULE_HOUR_OPTIONS.indexOf(hour)),
+    Math.max(0, SCHEDULE_MINUTE_OPTIONS.indexOf(minute)),
+  ]
+}
+
+export function pickerIndexToTime(value: number[]): string {
+  const hour = SCHEDULE_HOUR_OPTIONS[value[0]] ?? SCHEDULE_HOUR_OPTIONS[0]
+  const minute = SCHEDULE_MINUTE_OPTIONS[value[1]] ?? SCHEDULE_MINUTE_OPTIONS[0]
+  return `${hour}:${minute}`
+}
+
+/** 将 "HH:mm" 加一小时，不超过当日最晚结束时间 21:30 */
+export function addOneHourCapped(time: string): string {
+  const next = timeToMinutes(time) + 60
+  const cap = timeToMinutes(DEFAULT_SCHEDULE_END_TIME)
+  return minutesToTime(Math.min(next, cap))
+}