fix(combobox): pin clear+trigger absolute when chips present (MUI pattern)

When `<Combobox.SelectedTags>` has at least one chip, anchor the
ClearButton + Trigger absolutely at the right edge of the Control
(MUI Autocomplete pattern). Chips + input can now wrap freely
without ever pushing the right-side affordances to a new row.

`--_combobox-affordances-w` reserves the right-padding the
absolutely-positioned buttons consume, scaled to the control's
current height token.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/uix/eidos/components/combobox/combobox.css

@@ -507,18 +507,37 @@
 	display: none;
 }
 
-/* Make the Control breathe vertically when chips are present so the
- * input + chips stack visually instead of clipping. */
+/* Material UI Autocomplete pattern — when chips are present, pin the
+ * right-side affordances absolutely so chips + input wrap freely
+ * without ever pushing the clear/trigger to a new row.
+ *
+ * `--_combobox-affordances-w` reserves the right-padding the
+ * absolutely-positioned ClearButton + Trigger consume (each is ~26px
+ * wide with size=md, scaled below for xs/sm/lg/xl). */
 [data-combobox-control]:has([data-combobox-selected-tags]:not([data-empty])) {
+	--_combobox-affordances-w: calc(var(--_combobox-control-height) * 2);
+	position: relative;
 	padding-block: var(--space-1);
+	padding-inline-end: calc(var(--_combobox-control-px) + var(--_combobox-affordances-w));
+}
+
+[data-combobox-control]:has([data-combobox-selected-tags]:not([data-empty]))
+	[data-combobox-clear-button],
+[data-combobox-control]:has([data-combobox-selected-tags]:not([data-empty]))
+	[data-combobox-trigger] {
+	position: absolute;
+	inset-block-start: 50%;
+	transform: translateY(-50%);
 }
 
-/* When chips are present, pin the right-side affordances (ClearButton +
- * Trigger) to the end of the row so they don't visually float in the
- * middle when the input + chips wrap. */
 [data-combobox-control]:has([data-combobox-selected-tags]:not([data-empty]))
 	[data-combobox-clear-button] {
-	margin-inline-start: auto;
+	inset-inline-end: calc(var(--_combobox-control-px) + var(--_combobox-control-height));
+}
+
+[data-combobox-control]:has([data-combobox-selected-tags]:not([data-empty]))
+	[data-combobox-trigger] {
+	inset-inline-end: var(--_combobox-control-px);
 }
 
 [data-combobox-selected-tag] {