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/Browser/FieldsTest.php

@@ -116,7 +116,7 @@ it('shows and hides a password', function () {
         ->type('#password-field', 'secret')
         ->click('[data-field-reveal]')
         ->assertScript("document.querySelector('#password-field').type === 'text'")
-        ->assertAttribute('[data-field-reveal]', 'aria-pressed', 'true')
+        ->assertAttribute('[data-field-reveal]', 'aria-label', 'Hide password')
         ->click('[data-field-reveal]')
         ->assertScript("document.querySelector('#password-field').type === 'password'");
 });