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/theme.css

@@ -125,6 +125,22 @@ html {
   background: var(--bg-0);
 }
 
+/* ---- text root: 设置 →「文字大小」 ---------------------------------------------------------------
+   1rem above is the LAYOUT root, and five modules convert it to pixels with getComputedStyle:
+   ui/fieldHost.js hudPadding / hudBands (the prep camera's HUD clearance), ui/gameLogic/panel.js
+   panelSlots (which side the detail card docks), ui/underframe.js (the tile labels' pixel budget) and
+   ui/fallbackField.js (the DOM board) — raising it would move the board, not just the text.
+   --t is the TEXT root: it appears only in font-size declarations, so a player can enlarge the
+   interface text without touching any layout. The field itself is sized from host.clientWidth /
+   clientHeight (render/app.js), which no font-size can reach.
+   小 = 1rem reproduces the design's own sizes exactly, on every device. The other steps keep the
+   desktop gentle and lift the phone: 1rem there is clamped at 40 px by the rule above, which is what
+   made the .18rem body text 7.2 CSS px. */
+:root { --t: 1rem; }
+:root[data-text="md"] { --t: max(1rem, 64px); }
+:root[data-text="lg"] { --t: max(calc(1rem * 1.15), 76px); }
+:root[data-text="xl"] { --t: max(calc(1rem * 1.3), 88px); }
+
 *, *::before, *::after { box-sizing: border-box; }
 
 body {
@@ -134,7 +150,7 @@ body {
   background: var(--bg-0);
   color: var(--text-hi);
   font-family: var(--font-cjk);
-  font-size: .18rem;
+  font-size: calc(.18 * var(--t));
   line-height: 1.5;
   font-weight: 400;
   -webkit-font-smoothing: antialiased;
@@ -170,7 +186,7 @@ h1, h2, h3, h4, p { margin: 0; }
 .display { font-family: var(--font-display); text-transform: uppercase; letter-spacing: .12em; }
 .micro {
   font-family: var(--font-display);
-  font-size: .11rem;
+  font-size: calc(.11 * var(--t));
   line-height: 1.2;
   letter-spacing: .18em;
   text-transform: uppercase;