fix(review): thickness band derived from thickness_in (#88); MultiSelect shows selected names + commits on toggle settle (#90)

#88 — thickness band is now display-only, derived deterministically from
thickness_in against the synced Woo thickness terms (TV-9 / QUALITY-95).
Replaces the <select> with a read-only div. New pure function
deriveThicknessTermId + 6 unit tests. Docs (UAT-PRACTICE, contracts/UX)
updated to reflect the band is not an owner control.

#90 — MultiSelect closed state now shows the selected option names
(truncated to 2 + +N) instead of just a count. onCommit prop wired so
multi-select changes persist + re-review immediately (250ms debounce,
flush on Done, cleanup on destroy). Single-select binds use string vars
(speciesSel/edgeSel/gradeSel) to fix the number/string mismatch with
<option value={id}>; a tick()-deferred syncSelects() keeps the DOM
option in sync after programmatic writes (AI prefill, reload hydrate)
that Svelte's own select_option would otherwise reset.

docs/UAT-PRACTICE.md

@@ -121,7 +121,10 @@ hard stop. Switch to a supported browser.
 3. **Wood categories.** Pick at least one from the synced list.
 4. **Edge type, figure, grade.** Pick from the synced lists. One edge type, at least one figure,
    exactly one grade.
-5. **Thickness band.** Pick the Woo band that the measured thickness rounds up into.
+5. **Thickness band.** Not a control — it is derived automatically from the measured
+   thickness (the thickness-in rounds up into the synced Woo band, `TV-9` / `QUALITY-95`).
+   It displays read-only on the Review screen; fix it upstream by correcting the thickness
+   on capture/measure if the band looks wrong.
 6. **Moisture.** Keep the default (kiln-dried) or change it.
 7. **fig-* tags.** Optional; pick any from the synced list.
 8. **feat-* tags.** Zero or more. Only pick existing `feat-*` tags.