Show Capacity and Remaining per Ticket Type on Event Page

## Summary

The event page currently displays only the aggregated **Capacity** and **Remaining** values across all ticket types.

For events with multiple ticket categories, attendees cannot easily understand the relative availability of each ticket type.

## Proposal

Display **Capacity** and **Remaining** values for each ticket type in addition to the overall event totals.

Example:

| Ticket Type | Capacity | Remaining |
|-------------|-----------|-----------|
| General Admission | 100 | 35 |
| Student | 50 | 12 |
| Sponsor | 20 | 8 |

## Benefits

- Helps attendees understand availability for the ticket type they intend to register for
- Provides better visibility into relative ticket demand
- Allows attendees to gauge how quickly a specific ticket type may fill up

## Related

Related to #561, which added overall Capacity and Remaining visibility at the event level.