fix: correct interval reminder scheduling and done action behavior

- Replace IntervalTrigger with OrTrigger of CronTriggers for interval
  reminders, ensuring triggers align to window start each day without drift
- Refactor executor to extract _send_reminder_message helper, removing
  the runtime window check (now handled at scheduling layer)
- Change "done" button to only acknowledge the notification without
  deactivating the reminder

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bot/handlers/callback.py

@@ -31,10 +31,8 @@ async def handle_callback(update: Update, context: ContextTypes.DEFAULT_TYPE) ->
             return
 
         if action == "done":
-            reminder.is_active = False
-            session.commit()
-            remove_reminder_job(reminder_id)
-            await query.edit_message_text(f"✅ 已完成提醒：{reminder.title}")
+            # Just acknowledge, don't stop the reminder
+            await query.edit_message_text(f"✅ 已确认提醒：{reminder.title}")
 
         elif action == "snooze":
             # Ask user for snooze minutes

bot/scheduler/executor.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import logging
-from datetime import datetime, timedelta, timezone
+from datetime import datetime, timezone
 
 import pytz
 from telegram import Bot
@@ -31,41 +31,8 @@ async def execute_reminder(reminder_id: int, bot: Bot) -> None:
             logger.info("Skipping reminder %d on holiday", reminder_id)
             return
 
-        # For interval reminders, check time window
-        if reminder.reminder_type == "interval":
-            if not _in_window(now_local, reminder.interval_start_time, reminder.interval_end_time):
-                logger.debug("Reminder %d outside time window, skipping", reminder_id)
-                return
-
-        # Build message
-        user = reminder.logs  # just to load relationship lazily – not needed here
-        text = _build_message(reminder)
-        keyboard = reminder_action_keyboard(reminder.id)
-
-        # Fetch the telegram_id from users table
-        from bot.models.user import User  # avoid circular import at module level
-        user_obj = session.get(User, reminder.user_id)
-        if user_obj is None:
-            return
-
-        await bot.send_message(
-            chat_id=user_obj.telegram_id,
-            text=text,
-            parse_mode="Markdown",
-            reply_markup=keyboard,
-        )
-
-        # Update reminder timestamps
-        reminder.last_sent_at = now_utc
-        log = ReminderLog(reminder_id=reminder.id, sent_at=now_utc, status="sent")
-        session.add(log)
-
-        # Deactivate one-time reminders after firing
-        if reminder.reminder_type == "once":
-            reminder.is_active = False
-
-        session.commit()
-        logger.info("Sent reminder %d to user %d", reminder_id, user_obj.telegram_id)
+        # Send the reminder
+        await _send_reminder_message(reminder, bot, session, now_utc, now_local)
 
     except Exception:
         logger.exception("Error executing reminder %d", reminder_id)
@@ -74,15 +41,38 @@ async def execute_reminder(reminder_id: int, bot: Bot) -> None:
         Session.remove()
 
 
-def _in_window(now_local: datetime, start: str | None, end: str | None) -> bool:
-    if not start or not end:
-        return True
-    sh, sm = map(int, start.split(":"))
-    eh, em = map(int, end.split(":"))
-    current_minutes = now_local.hour * 60 + now_local.minute
-    start_minutes = sh * 60 + sm
-    end_minutes = eh * 60 + em
-    return start_minutes <= current_minutes <= end_minutes
+async def _send_reminder_message(
+    reminder: Reminder, bot: Bot, session, now_utc: datetime, now_local: datetime
+) -> None:
+    """Send a single reminder message."""
+    # Build message
+    text = _build_message(reminder)
+    keyboard = reminder_action_keyboard(reminder.id)
+
+    # Fetch the telegram_id from users table
+    from bot.models.user import User  # avoid circular import at module level
+    user_obj = session.get(User, reminder.user_id)
+    if user_obj is None:
+        return
+
+    await bot.send_message(
+        chat_id=user_obj.telegram_id,
+        text=text,
+        parse_mode="Markdown",
+        reply_markup=keyboard,
+    )
+
+    # Update reminder timestamps
+    reminder.last_sent_at = now_utc
+    log = ReminderLog(reminder_id=reminder.id, sent_at=now_utc, status="sent")
+    session.add(log)
+
+    # Deactivate one-time reminders after firing
+    if reminder.reminder_type == "once":
+        reminder.is_active = False
+
+    session.commit()
+    logger.info("Sent reminder %d to user %d", reminder.id, user_obj.telegram_id)
 
 
 def _build_message(reminder: Reminder) -> str:

bot/scheduler/job_manager.py

@@ -6,9 +6,9 @@ from typing import Optional
 
 import pytz
 from apscheduler.schedulers.asyncio import AsyncIOScheduler
+from apscheduler.triggers.combining import OrTrigger
 from apscheduler.triggers.cron import CronTrigger
 from apscheduler.triggers.date import DateTrigger
-from apscheduler.triggers.interval import IntervalTrigger
 from telegram import Bot
 
 from bot.models.database import Session
@@ -121,8 +121,29 @@ def _build_trigger(reminder: Reminder):
         return CronTrigger(day_of_week=dow, hour=h, minute=m, timezone=SHANGHAI_TZ)
 
     if rtype == "interval":
-        if not reminder.interval_minutes:
+        if not reminder.interval_minutes or not reminder.interval_start_time or not reminder.interval_end_time:
             return None
-        return IntervalTrigger(minutes=reminder.interval_minutes, timezone=SHANGHAI_TZ)
+        # Calculate all trigger times within the window
+        sh, sm = map(int, reminder.interval_start_time.split(":"))
+        eh, em = map(int, reminder.interval_end_time.split(":"))
+
+        window_start_minutes = sh * 60 + sm
+        window_end_minutes = eh * 60 + em
+
+        # Generate all trigger times
+        triggers = []
+        current_minutes = window_start_minutes
+        while current_minutes <= window_end_minutes:
+            h = current_minutes // 60
+            m = current_minutes % 60
+            if h < 24:
+                triggers.append(CronTrigger(hour=h, minute=m, timezone=SHANGHAI_TZ))
+            current_minutes += reminder.interval_minutes
+
+        if not triggers:
+            return None
+        if len(triggers) == 1:
+            return triggers[0]
+        return OrTrigger(triggers)
 
     return None