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/manifest.json

@@ -0,0 +1,16 @@
+{
+  "id": "/",
+  "name": "卫戍协议：盟约",
+  "short_name": "卫戍协议",
+  "description": "明日方舟「卫戍协议：盟约」非官方同人复刻",
+  "start_url": "/",
+  "scope": "/",
+  "display": "fullscreen",
+  "orientation": "landscape-primary",
+  "background_color": "#0c0f0e",
+  "theme_color": "#0c0f0e",
+  "icons": [
+    { "src": "/icons/app-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any" },
+    { "src": "/icons/app-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any" }
+  ]
+}