feat(appointments): add FBA creation and destination filtering

src/modules/appointment-calendar/calendar.ts

@@ -29,16 +29,19 @@ export function addDays(value: string, days: number): string {
 
 export function calendarRange(anchor: string, mode: CalendarMode): { from: string; to: string } {
   const date = parseDate(anchor)
+  const nextMonth = new Date(date.getFullYear(), date.getMonth() + 1, 1, 12)
   if (mode === 'month') date.setDate(1)
   date.setDate(date.getDate() - (date.getDay() + 6) % 7)
   const from = dateKey(date)
-  // A half-open interval also works directly with database timestamps.
-  return { from, to: addDays(from, mode === 'month' ? 42 : 7) }
+  // 月视图只补齐月末所在周，不追加整周的下月日期；结束日期仍为开区间。
+  return { from, to: mode === 'month' ? addDays(dateKey(nextMonth), (8 - nextMonth.getDay()) % 7) : addDays(from, 7) }
 }
 
 export function calendarDates(anchor: string, mode: CalendarMode): string[] {
-  const { from } = calendarRange(anchor, mode)
-  return Array.from({ length: mode === 'month' ? 42 : 7 }, (_, index) => addDays(from, index))
+  const { from, to } = calendarRange(anchor, mode)
+  const dates: string[] = []
+  for (let date = from; date < to; date = addDays(date, 1)) dates.push(date)
+  return dates
 }
 
 export function moveCalendar(anchor: string, mode: CalendarMode, offset: number): string {