When a card is scanned, the public profile can open with a full-bleed, AI-generated welcome hero before the contact info — experience #10 from the scan-experiences brief, on the share-token experience selector foundation. Backend (cardclaws-backend): - migration 0005_welcome.sql: add cards.welcome JSONB; flows through PublicProfile via serde flatten. - POST /v1/cards/:id/welcome (owner-gated): refine + generate via the existing AiClient (nano-banana), store {kind, message, imageDataUrl}. - card_service::set_welcome + queries::update_welcome; CardRow gains `welcome`. - 2 tests (generate→public-profile, ownership); workspace gate green (116 tests). - Verified live with real Gemini end-to-end. Web (cardclaws-profile): - WelcomeHero.astro: full-bleed AI hero + greeting + "scroll to connect" cue. - [handle].astro renders it when the card has a welcome; experience selector (?x=profile suppresses) as the lever for the other experiences. - PublicProfile gains an optional `welcome`; astro check clean. MVP inlines the image as a data URL; production swaps to an R2 URL (isolated in the welcome column). Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>