Fix reminder scheduling and add group features

- Fix reminder duplicate bug: use slot-only keys to prevent multiple reminders when settings change
- Add New Jackpot announcement delay setting for groups (default 5 min)
- Cancel unpaid purchases after draw completes (prevents payments for past rounds)
- Add BotFather commands template file
- Update README documentation

telegram_bot/src/messages/index.ts

@@ -603,6 +603,7 @@ To buy tickets privately, message me directly! 🎟`,
       reminder3Enabled?: boolean;
       reminder3Time?: { value: number; unit: string };
       announcementDelaySeconds?: number;
+      newJackpotDelayMinutes?: number;
     }) => {
       const announceDelay = settings.announcementDelaySeconds ?? 10;
       const formatAnnounce = announceDelay === 0 
@@ -610,6 +611,11 @@ To buy tickets privately, message me directly! 🎟`,
         : announceDelay >= 60 
           ? `${announceDelay / 60} min after draw`
           : `${announceDelay}s after draw`;
+
+      const newJackpotDelay = settings.newJackpotDelayMinutes ?? 5;
+      const formatNewJackpotDelay = newJackpotDelay === 0 
+        ? 'Immediately'
+        : `${newJackpotDelay} min after start`;
       
       // Format helper for reminder times
       const formatTime = (t?: { value: number; unit: string }) => {
@@ -639,7 +645,7 @@ To buy tickets privately, message me directly! 🎟`,
 
 *Current Configuration:*
 ${settings.enabled ? '✅' : '❌'} Bot Enabled
-${newJackpot ? '✅' : '❌'} New Jackpot Announcements
+${newJackpot ? '✅' : '❌'} New Jackpot Announcements ${newJackpot ? `_(${formatNewJackpotDelay})_` : ''}
 ${settings.drawAnnouncements ? '✅' : '❌'} Draw Announcements ${settings.drawAnnouncements ? `_(${formatAnnounce})_` : ''}
 ${settings.reminders ? '✅' : '❌'} Draw Reminders ${settings.reminders ? `_(${formatReminderList})_` : ''}
 ${settings.ticketPurchaseAllowed ? '✅' : '❌'} Ticket Purchases in Group