feat(uix): touch-target — list rows hit 44px on coarse pointers

Second touch-target pass (after the button-like controls, a265d39a). On COARSE
pointers (touch), menu / select / listbox / command rows grow to the 44px mobile
minimum. `--list-item-height` (list-surface.css) is the row's min-block-size floor
that every list surface bridges to, so lifting it for the small sizes (xs/sm/md,
all < 44) grows every list row at once; lg (44) / xl (52) already clear it. Desktop
(fine pointer) keeps its compact rhythm.

Verified: coarse rule serves; md list-surface matches (->44), lg doesn't; desktop
md row stays calc(36px).

src/uix/eidos/lib/list-surface.css

@@ -69,3 +69,20 @@
 	--list-content-padding: var(--space-2-5);
 	--list-content-radius: var(--radius-md);
 }
+
+/* ── Touch-target (a11y) — coarse pointers ──────────────────────────────────
+ * On COARSE pointers (touch), a list row is a tap target → it must clear the 44px
+ * mobile minimum (WCAG 2.5.5 AAA · Apple HIG 44pt · Material 48dp), matching the
+ * button-like controls (archetypes.css). `--list-item-height` is the row's
+ * min-block-size FLOOR (`[data-archetype='item'/'option']`), and every menu /
+ * select / listbox / command bridges its own item-height token to it — so lifting
+ * it here grows every list row at once. Only the small sizes (xs/sm/md, all < 44)
+ * are raised; lg (44) / xl (52) already clear it. Desktop (fine pointer) keeps its
+ * compact rhythm. */
+@media (pointer: coarse) {
+	[data-list-surface][data-size='xs'],
+	[data-list-surface][data-size='sm'],
+	[data-list-surface][data-size='md'] {
+		--list-item-height: 44px;
+	}
+}