7d0450f541
Replace the single-spout bounce animation with two independent `╭───╮` arcs sweeping at different speeds across a calm `─` water surface. Add `footer_working_label` to pulse `working` → `working...` at 400 ms cadence while a turn is live. The dot-pulse fires even in low-motion mode; the arc strip is gated behind `!app.low_motion`. Frame math is purely deterministic so the test suite can pin specific frames. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>