Subscription dashboard improvements, AI text generation limit, and other fixes.

backend/services/scheduler/utils/frequency_calculator.py

@@ -0,0 +1,33 @@
+"""
+Frequency Calculator Utility
+Calculates next execution time based on frequency string.
+"""
+
+from datetime import datetime, timedelta
+from typing import Optional
+
+
+def calculate_next_execution(frequency: str, base_time: Optional[datetime] = None) -> datetime:
+    """
+    Calculate next execution time based on frequency.
+    
+    Args:
+        frequency: Frequency string ('Daily', 'Weekly', 'Monthly', 'Quarterly')
+        base_time: Base time to calculate from (defaults to now if None)
+        
+    Returns:
+        Next execution datetime
+    """
+    if base_time is None:
+        base_time = datetime.utcnow()
+    
+    frequency_map = {
+        'Daily': timedelta(days=1),
+        'Weekly': timedelta(weeks=1),
+        'Monthly': timedelta(days=30),
+        'Quarterly': timedelta(days=90)
+    }
+    
+    delta = frequency_map.get(frequency, timedelta(days=1))
+    return base_time + delta
+