End a select's long value before its arrow, with an ellipsis

Where the browser has the customizable select, select.css made the
select `display: flex` with `text-overflow: ellipsis`, but the closed
select draws its value in a block of its user-agent shadow tree: a flex
item at its automatic minimum width that takes no `text-overflow` from
the select, and no author style reaches it (`display: block` on the
select does not help either). So a long option in a narrow field, or
at `size="sm"` and `xs`, ran on past the end padding under the arrow,
which `overflow: hidden` only clips at the select's edge. The native
select in Firefox cut the value at the padding with no ellipsis.

The view now gives the select a first child `<button type="button"
wire:ignore>` holding `<selectedcontent>`, the customizable select's own
copy of the chosen option, and select.css makes that the flex item that
shrinks and ends in an ellipsis; the native select takes `nowrap`,
`overflow: hidden` and the ellipsis on itself. `wire:ignore`, because a
Livewire render parses the server's empty element into the first
option's label and morphed it back over the chosen one. A browser
without the customizable select never renders the button; `type` keeps
it from being a form's default button.

A browser test measures the value against the arrow in md, sm, xs,
filled and icon selects 240px wide, and again after choosing another
option re-renders the component; it fails without the change in Chrome
and Firefox.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/Feature/Components/FieldTest.php

@@ -139,6 +139,8 @@ it('draws a native select whose label always floats', function () {
         ->toContain('data-md-select')
         ->toMatch('/<select(?=[^>]*data-md-field-control)[^>]*>/')
         ->toContain('<select')
+        // The customizable select's value, cut with an ellipsis before the arrow; the browser fills it.
+        ->toContain('<button type="button" wire:ignore><selectedcontent></selectedcontent></button>')
         ->toContain('wire:model="hours"')
         ->toContain('<option value="">Choose…</option>')
         ->toContain('<option value="1" >1 hour</option>')