Restructure profile page with 6 visual improvements: - Bio links styled with prose-barazo class (cyan underline) - Display name + handle on same line (flex wrap) - HR separator between bio and stats - Stats grouped by scope: This forum / AT Protocol / Barazo-wide - Large numbers abbreviated (1.5K, 2.3M) with full tooltip - Bluesky link shows URL instead of "View on Bluesky"