Speed slider: a log duration MULTIPLE over the path's own distance-derived time

Paul: "change the duration slider to a logarithmic duration multiple between faster and slower, 100x speed to a million times longer; as nodes are added and expand, measure the full distance and come up with a reasonable default duration; put that duration up as a tooltip when people move nodes

• share.js: the path's own length sets the BASE time — BASE_SPW = 1.2s per world-unit, tuned so the seeded default triangle (~1500wu) keeps its historical ~30 minutes at x1

• panels.js: the slider is 8 log decades, x1 detent at center; readout "x12 · 6.4 hr"; label tooltip states the path's own time at x1.

• starmap.js: dragging a waypoint floats a live tooltip — "loop ≈ 32 min" (recomputed as the drag stretches the perimeter), plus "x100 -> 2.2 days" when the dial is off x1.

• access.js: the a11y twin dials the same multiple with a spoken aria-valuetext (multiple, effective time, and the path's own time).

Verified: share-url-run 13/13, access-ui-run 12/12, full-boot green. explorer-ui-test's H section (background alternation) fails IDENTICALLY at the pre-session baseline 081a256

▶ Play it: Dial Tone Prophet — the genre built out of recorded and synthesized voices https://stellate.app/?genre=spokenword&seed=1934&path=196.11721,215.11754,177.11754&xdur=13.122

dbd3021 https://github.com/aboard-io/stellate/commit/dbd30216c017cc70abb1e341345d93fc0cb6f997