Implement Configurable Budget Usage Warnings

[mrmartin1998]

Currently, the system needs a way to alert users when their budget usage reaches customizable thresholds. Users should be able to set their own warning levels for budget utilization.

Current Behavior:

• No budget usage warnings implemented
• No way to set custom warning thresholds
• Users can't track budget usage proactively
• Missing alerts for budget milestones

Expected Behavior:

1. Users can set custom warning thresholds:

   • Default warnings at 70% and 90%
   • Custom percentage input (e.g., 50%, 75%, 85%)
   • Multiple warning levels per budget

2. Warning System:

   • Visual indicators on budget progress bars
   • Toast notifications when thresholds are reached
   • Email notifications (optional)
   • Dashboard alerts for approaching limits

3. Configuration Options:

   • Enable/disable specific warnings
   • Choose notification methods
   • Set warning frequency
   • Configure notification message

Technical Investigation Points:

1. Add warning threshold settings to budget schema
2. Create warning configuration UI
3. Implement threshold monitoring system
4. Add notification triggers
5. Create progress visualization
6. Add notification preferences
7. Implement real-time warning checks