ludic.ui: emit click reaches on-click, and a select's < steps back

From the user's play: clicking an item in the pack opened nothing, and the wardrobe's picks did
not respond - both are a component whose button says `emit click` (ItemCell, LookCell, ListRow),
answered by its user's on-click. An on-* attribute's name is kept as a browser would have it, so
on-click is on-press (tpl_event), and the emit looked for "click" and found nothing. An emitted
name now goes through the same tpl_event.

And a settings cycler's left arrow did the right one's job: any press let go on a select stepped it
forward. ct_activate_at steps back when it is let go over the select's .ui-prev; Enter and the rest
of the select still step forward.

Goldens ui_emit_click (the mouse and a press both reach on-click; with the toolchain before this,
neither does) and ui_select_arrows (1 -> 0 on <, then 2 on > >; before this, 1 -> 2 on <). The 33
ui examples pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/ludic.ui/act.ludic

@@ -26,7 +26,7 @@ function act_parse(src: string, err: []string) -> UiAct {
       push(a.exprs, px_cond(r))
     } else if act_keyword(r, "emit") {
       push(a.kinds, A_EMIT)
-      push(a.names, rd_name(r))
+      push(a.names, tpl_event(rd_name(r)))   # `emit click` reaches on-click, which is kept as press
       push(a.exprs, null)
     } else {
       push(a.kinds, A_CALL)