Finish the keyboards, and say a state once

Shift+M and Shift+Y reach the month and year dropdowns, which is M3's
date picker keyboard table; Home and End go to the ends of an open
combobox list, and stay the field's own caret keys when it is closed. The
password reveal drops aria-pressed and keeps only its flipping label, so
a screen reader hears the state once rather than twice and inverted. The
radio's `inline` now says that M3 cautions against a row and wants an
option chosen on load.

Plan step 20, findings IN-22, IN-23, IN-28 and IN-29.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

tests/Feature/Components/DatepickerTest.php

@@ -54,6 +54,14 @@ it('makes the field a read-only trigger for the modal and modal input pickers',
         ->and(datepickerConfig($html)['mode'])->toBe($mode);
 })->with(['modal', 'input']);
 
+it('names each dropdown so Shift+M and Shift+Y can reach it', function () {
+    $html = (string) $this->blade('<x-datepicker label="Birthday" />');
+
+    expect($html)
+        ->toContain('data-datepicker-menu-button="months"')
+        ->toContain('data-datepicker-menu-button="years"');
+});
+
 it('falls back to the docked picker for an unknown mode', function () {
     expect(datepickerConfig((string) $this->blade('<x-datepicker label="Date" mode="wheel" />'))['mode'])->toBe('docked');
 });