0.2.3: prepare follow-up fixes and client features (#407, #408, #410, #413, #431, #435, #436, #440, #444)

Add special-target activation without bypassing attack cadence, cooperative
card preferences and emotes, skill sound banks, per-operator voice choices,
text sizing, install prompts, closed-tab recovery and unanimous setup rerolls.
Retain late deployment elapsed time and resolve echo/counter pulses without
recursive hook overflow. Independent final review remains pending.

Golden: roster-016, roster-035, roster-036, roster-045;
boss-boss_1-pair, boss-boss_3-pair, boss-boss_5-pair, boss-boss_7-pair,
hidden-boss_9-pair; solo-HARD-9-boosted: Lemuen attack cadence.
diy-132: Necras extra activation targets.
coop2-NORMAL-14-standins: cooperative purchase preference and simulation fixes.
hidden-boss_10-solo: echo pulse FIFO resolution.
See DESIGN 28.13-28.24 for assumptions, sources and contributor credit.

test/ui/voice-prefs-023.test.js

@@ -0,0 +1,28 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { sanitizeSettings } from '../../public/js/ui/gameLogic/settings.js';
+import { sanitizeVoiceOverrides, voiceLangFor } from '../../public/js/voicePrefs.js';
+import { AudioManager, voiceLine } from '../../public/js/audio.js';
+const a = 'char_263_skadi', b = 'char_103_angel';
+test('old settings migrate to inherit, malformed or prototype entries are discarded', () => {
+  assert.deepEqual(sanitizeSettings({ voiceLang: 'jp' }).voiceOverrides, {});
+  assert.deepEqual(sanitizeVoiceOverrides(Object.assign(Object.create({ [b]: 'jp' }), { [a]: 'jp', bad: 'cn', char_1_no: 'en' })), { [a]: 'jp' });
+  for (const raw of [null, [], 1, 'jp']) assert.deepEqual(sanitizeVoiceOverrides(raw), {});
+});
+test('per-character override survives persistence; deletion restores the current global setting', () => {
+  const settings = sanitizeSettings(JSON.parse(JSON.stringify({ voiceLang: 'cn', voiceOverrides: { [a]: 'jp', [b]: 'cn' } })));
+  const manager = new AudioManager();
+  manager.setVoiceLang(settings.voiceLang, settings.voiceOverrides);
+  assert.equal(voiceLangFor(a, manager.voiceLang, manager.voiceOverrides), 'jp');
+  manager.setVoiceLang('jp');
+  assert.equal(voiceLangFor(b, manager.voiceLang, manager.voiceOverrides), 'cn');
+  delete settings.voiceOverrides[b];
+  manager.setVoiceLang('jp', settings.voiceOverrides);
+  assert.equal(voiceLangFor(b, manager.voiceLang, manager.voiceOverrides), 'jp');
+  assert.equal(voiceLangFor('unknown', 'cn', manager.voiceOverrides), 'cn');
+});
+test('the per-operator JP preference retains the existing per-slot Chinese fallback', () => {
+  const tree = { voice: { [a]: { select: '/cn.mp3' } }, voiceJp: { [a]: { skill1: '/jp.mp3' } } };
+  assert.equal(voiceLine(tree, a, 'select', voiceLangFor(a, 'cn', { [a]: 'jp' })).url, '/cn.mp3');
+  assert.equal(voiceLine(tree, a, 'skill1', voiceLangFor(a, 'cn', { [a]: 'jp' })).url, '/jp.mp3');
+});