Hide field, search and chip text with md-visually-hidden again

Plan step 36 review. 52fd65a3 replaced the md-visually-hidden class on
field's spoken counter, search's result count and a bound filter chip's
native checkbox with hooks carrying copies of its clip, on the reading
that a package view writes no class but the interaction classes. The
brief and step 34 let a view write the text classes too, and one shared
source beats three copies: the class is back, the copies and the
data-md-field-live and data-md-chip-native hooks are gone
(data-md-search-status predates them and stays). chip.css keeps its
tooltip.css import.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

tests/Feature/Components/FieldTest.php

@@ -173,7 +173,7 @@ it('counts the characters of a field that has a maximum', function () {
         ->toContain('data-md-field-support-row')
         ->toContain('data-md-field-counter')
         ->toContain('x-bind:data-md-over="used > max"')
-        ->toContain('data-md-field-live')
+        ->toContain('<span class="md-visually-hidden" aria-live="polite" aria-atomic="true" x-text="spoken"></span>')
         ->toContain('maxlength="60"')
         ->toContain('max: 60,')
         ->toContain('>0/60</span>')