Push-Scheduler: auf volle Minute synchronisiert

backend/src/index.js

@@ -82,7 +82,14 @@ async function sendPushoverMsg(userKey, appToken, message) {
   } catch(e) { console.error('Pushover Fehler:', e.message); }
 }
 
-setInterval(async () => {
+// Beim Start auf die nächste volle Minute synchronisieren
+const msToNextMinute = (60 - new Date().getSeconds()) * 1000 - new Date().getMilliseconds();
+setTimeout(() => {
+  runScheduler();
+  setInterval(runScheduler, 60 * 1000);
+}, msToNextMinute);
+
+async function runScheduler() {
   try {
     const now = db.prepare("SELECT datetime('now','localtime') as t").get().t;
     const due = db.prepare(`
@@ -91,13 +98,12 @@ setInterval(async () => {
       JOIN pushover_settings p ON p.user_id = s.user_id
       WHERE s.sent = 0 AND s.scheduled_at <= ?
     `).all(now);
-
     for (const row of due) {
       await sendPushoverMsg(row.user_key, row.app_token, row.message);
       db.prepare('UPDATE push_schedules SET sent=1 WHERE id=?').run(row.id);
       console.log(`✓ Push gesendet an user ${row.user_id}: "${row.message}" (fällig: ${row.scheduled_at})`);
     }
   } catch(e) { console.error('Push-Job Fehler:', e.message); }
-}, 60 * 1000);
+}
 
-console.log('⏰ Push-Scheduler aktiv (jede Minute)');
+console.log(`⏰ Push-Scheduler aktiv – nächste Prüfung in ${Math.round(msToNextMinute/1000)}s`);