Launch update: real data, badges, and per-pixel certificates

This launch cycle focused on trust and product quality. We removed seeded/mock ownership records and moved core surfaces to real Supabase-backed data only. Leaderboards, profile views, and activity cards now reflect real owners and real events.

We also introduced a dynamic badge system that updates from real activity, plus in-app badge-earned notifications. Profiles now support richer identity fields, including Instagram, TikTok, Facebook, and a dedicated public profile description.

Finally, ownership proof got stronger: each square can now generate its own certificate page and downloadable image. Combined with the new one-tap share action, supporters can show exactly which coordinate they own.