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/css/screens/loadout.css

@@ -634,3 +634,8 @@
 .lo-io__text:focus { border-color: var(--mint-700); }
 .lo-io__text::placeholder { color: var(--text-lo); }
 .lo-io__file { display: none; }
+
+/* Per-operator voice, a browser-local preference in roster and DIY details. */
+.lo-voice { display: flex; flex-wrap: wrap; align-items: center; gap: .12rem; padding: .14rem 0; font-size: calc(.18 * var(--t)); }
+.lo-voice > small { flex-basis: 100%; color: var(--text-dim); font-size: calc(.15 * var(--t)); }
+.lo-voice .lo-select { min-width: 1.6rem; max-width: 100%; }