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.

public/js/ui/device.js

@@ -20,7 +20,8 @@
 // CSS counterpart: public/css/devices.css (safe-area insets, touch-action, overscroll, tap-target expansion).
 
 import { useEffect, useState } from '../../vendor/hooks.module.js';
-import { html, Icon } from './components.js';
+import { pwaInstall } from '../pwa.js';
+import { html, Icon, Button } from './components.js';
 import { t } from '../../../shared/i18n.js';
 
 /** A touch held this long without moving opens the detail (contextmenu) on DOM controls. */
@@ -162,6 +163,20 @@ export function FullscreenButton({ class: cls = '' }) {
   </button>`;
 }
 
+/** Only a browser-issued install offer shows a button; installed and unsupported environments stay quiet. */
+export function PwaInstallButton({ class: cls = '', size = 'sm' }) {
+  const [available, setAvailable] = useState(pwaInstall.available);
+  useEffect(() => pwaInstall.subscribe(setAvailable), []);
+  if (!available) return null;
+  return html`<${Button} variant="secondary" size=${size} icon="download" class=${cls}
+    data-testid="pwa-install" onClick=${() => pwaInstall.request()}>${t('添加到桌面')}<//>`;
+}
+
+export function updateRotateHintPwaI18n(doc = globalThis.document) {
+  const btn = doc?.getElementById?.('rotate-hint-pwa');
+  if (btn) btn.textContent = t('添加到桌面');
+}
+
 // ---- boot-time installation ----------------------------------------------------------------------------------------
 
 let installed = null;
@@ -253,6 +268,13 @@ export function installDeviceSupport(win = globalThis) {
     if (lp.swallowUntil && Date.now() < lp.swallowUntil) { lp.swallowUntil = 0; e.preventDefault(); e.stopPropagation(); }
   }, { capture: true });
 
+  const pwaBtn = doc?.getElementById?.('rotate-hint-pwa');
+  if (pwaBtn) {
+    updateRotateHintPwaI18n(doc);
+    offs.push(pwaInstall.subscribe((available) => { pwaBtn.hidden = !available; }));
+    on(pwaBtn, 'click', () => { pwaInstall.request(); });
+  }
+
   installed = () => { for (const off of offs.splice(0)) { try { off(); } catch { /* ignore */ } } clearTimeout(rotTimer); installed = null; };
   return installed;
 }