0.2.4-dev: round-29 community fixes and the official shared card pool

- Shared card pool and item stock as in the official mode (the owner's request, from the 路标档案馆 video and public notes): solo low-tier exceptions, co-op operators x2, shared item stock with special-item exceptions, normal / advanced occupancy 1 / 2, re-check on buy, 机变 exhaustion, release on consume / destroy / elimination; 整备 never exceeds stock; invariant held <= cap.
- 突袭: one taunt-first reselect right after a revive (the owner's rule); ordinary polls and redeploys keep the 0.2.3 rule; a revive on an enemy's tile stays. #475: online boss / hidden-boss Raid may land on the empty half (owner-limited scope).
- 浊心斯卡蒂 S1 x 坚守 no longer bounce redirected damage, and the two shares conserve the hit (idea of PR #464 by @HappyTanuki).
- Operator fixes adapted from PRs by @Xinglan233 (#459 哈洛德 S2 elemental trigger, #460 涤火杰西卡 shield on the four adjacent tiles, #461 家族徽章 first hit after stealth, #462 松果 S2 regrow per deploy); 克莱门莎 S2 splash 1.1 / 100% ATK and air auto-trigger (#467); 白面 copying 歌蕾蒂娅 / 余 skips the three-member condition (#473, the owner's video).
- 香槟炸弹 is not chosen by friendly auras / heals (PR #468 / #476 by @Siornya); 琳琅诗怀雅 coin balance (PR #450 by @IceCodeNew); Touch prep display (PR #451 by @YinqiMargatroid); lobby header (PR #471 by @YuriRestia); Japanese UI terms (PR #448 by @scutkane).
- AI-only boss countdown grace, render-failure cache / recovery without restarting a battle, device units kept on a same-field re-entry, DIY detail / skill previews, large-text result buttons.
- golden: battle families equal 0.2.3 except diy-135 / diy-136 (克莱门莎); all 18 release matches move through the shared pool, every flip named in docs/history/0.2.4.md §29.12; two coverage scenarios added.

public/js/render/interp.js

@@ -116,7 +116,7 @@ export function normalizeSnapshot(snap) {
       if (tu && tu.length === 9) tu.push(e[1], clamp(finite(e[2]), 0, 1), finite(e[3]), Math.max(0, finite(e[4])));
     }
   }
-  const ammo = countList(snap.ammo, units), wolves = countList(snap.wolves, units);
+  const ammo = countList(snap.ammo, units), wolves = countList(snap.wolves, units), coins = countList(snap.coins, units);
   let neg = null;
   if (Array.isArray(snap.neg)) {
     for (const e of snap.neg) {
@@ -147,7 +147,7 @@ export function normalizeSnapshot(snap) {
       (standCut || (standCut = new Map())).set(e[0], e[1]);
     }
   }
-  return { t, units, down, ammo, wolves, neg, stand, standCut, raw: snap };
+  return { t, units, down, ammo, wolves, coins, neg, stand, standCut, raw: snap };
 }
 
 /**
@@ -402,6 +402,7 @@ export class SnapshotBuffer {
       // the HP-bar readouts come with the older snapshot, like flags (whole rounds step with the skill flag)
       o.ammo = A.ammo ? A.ammo.get(id) || null : null;
       o.wolves = A.wolves ? A.wolves.get(id) || null : null;
+      o.coins = A.coins?.get(id) ?? null;
       o.neg = A.neg ? A.neg.get(id) || 0 : 0;
       o.seen = stamp;
     }