Set up Farcaster notification system — review Dropcast pattern

[realproject7]

Summary

Set up sending notifications to PlotLink users via Farcaster's notification system. Review Dropcast's notification codebase and apply the same pattern to PlotLink.

Implementation

• Review dropcast notification structure:
  • How notification tokens are stored (Supabase table schema)
  • How notifications are sent (API route or server action)
  • Notification types and triggers (new plot published, trade activity, etc.)
• Apply same pattern to PlotLink with relevant notification events:
  • New plot added to a storyline the user follows/holds tokens for
  • Trade activity on user's storylines
  • Comments on user's stories

Acceptance Criteria

• Notification token storage in Supabase
• Server-side notification sending logic
• At least one notification trigger implemented (e.g. new plot published)
• Notifications received in Farcaster client