Fix TaskBeat: add live stuck-task watchdog (auto-reset in_progress > 5min every beat cycle)

app.py

@@ -2269,6 +2269,26 @@ def process_beat_tasks():
     
     while True:
         try:
+            # Stuck-Task-Watchdog: in_progress Tasks älter als 5 min zurücksetzen
+            try:
+                con = sqlite3.connect(EMAIL_JOURNAL_DB)
+                stuck = con.execute(
+                    "SELECT id, title FROM tasks WHERE status='in_progress' "
+                    "AND datetime(created_at) < datetime('now', '-5 minutes')"
+                ).fetchall()
+                if stuck:
+                    ids = [r[0] for r in stuck]
+                    con.execute(
+                        f"UPDATE tasks SET status='pending' WHERE id IN ({','.join('?'*len(ids))})",
+                        ids
+                    )
+                    con.commit()
+                    for r in stuck:
+                        logger.warning("[TaskBeat] Stuck Task #%d zurückgesetzt: %s", r[0], r[1][:60])
+                con.close()
+            except Exception as e:
+                logger.error("[TaskBeat] Watchdog-Fehler: %s", str(e))
+
             # Lade pending Tasks aus Datenbank
             db_tasks = get_tasks(status='pending')
             # Konvertiere zu Dict-Format für Legacy-Kompatibilität