feat: Add configurable draw cycles, improve UX

Backend:
- Add configurable draw cycle settings (minutes/hourly/daily/weekly/custom)
- Add CYCLE_TYPE, CYCLE_INTERVAL_*, CYCLE_DAILY_TIME, CYCLE_WEEKLY_* env vars
- Add SALES_CLOSE_BEFORE_DRAW_MINUTES and CYCLES_TO_GENERATE_AHEAD
- Fix SQLite parameter issue in scheduler

Frontend:
- Add 'Save This Link' section with copy button on ticket status page
- Improve draw animation to show immediately when draw starts
- Show 'Waiting for next round...' instead of 'Drawing Now!' after draw
- Hide Buy Tickets button when waiting for next round
- Skip draw animation if no tickets were sold
- Keep winner screen open longer (15s) for next cycle to load
- Auto-refresh to next lottery cycle after draw

Telegram Bot:
- Various improvements and fixes

telegram_bot/src/services/api.ts

@@ -143,3 +143,4 @@ class ApiClient {
 export const apiClient = new ApiClient();
 export default apiClient;
 
+

telegram_bot/src/services/groupState.ts

@@ -222,3 +222,4 @@ class GroupStateManager {
 export const groupStateManager = new GroupStateManager();
 export default groupStateManager;
 
+

telegram_bot/src/services/logger.ts

@@ -80,3 +80,4 @@ export const logPaymentEvent = (
 
 export default logger;
 
+

telegram_bot/src/services/qr.ts

@@ -25,3 +25,4 @@ export async function generateQRCode(data: string): Promise<Buffer> {
 
 export default { generateQRCode };
 
+

telegram_bot/src/services/state.ts

@@ -260,3 +260,4 @@ class StateManager {
 export const stateManager = new StateManager();
 export default stateManager;
 
+