~anthropic/claude-sonnet-latest → A (3:2)

Side A adds a concrete, tested UI improvement (vote-count badges, HUD 'unpin' turned into a proper POST action) with unit and browser-test coverage verifying the new behavior. Side B reworks the auth flow to rely on JS-only fragment morphing instead of redirects, removing the previous public_url-based redirect logic without adding any tests, which is a riskier architectural change with less verification of correctness.