on_plot_timer() re-anchored the server's RemainingForecast to the
live, ever-advancing elapsed_min on every 1s tick, even though that
forecast is only recomputed on step changes. Between step changes,
the unchanged (t_rem, theta_rem) array kept getting pushed further
right by the full live elapsed_min each tick instead of staying
anchored to when it was actually computed.
Store server_remaining_forecast as (anchor_min, T, Theta), with
anchor_min captured at receipt via a new _elapsed_min() helper, and
anchor the dashed projection to that fixed point instead of the live
tick's elapsed_min.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhiQe64F74uHV8jzuoSa5K
jensandClaude Sonnet 4.6
7d79d885b5