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.

server/match/choices.js

@@ -136,12 +136,12 @@ function itemCard(gd, id) {
  * Build the draft cards for an SP round.
  * @returns {{ family: string, name: string, desc: string, eventId: string|null, cards: object[] } | null}
  */
-export function generateDraft(gd, rng, round, { stageId = null, bondAvailable = null } = {}) {
+export function generateDraft(gd, rng, round, { stageId = null, bondAvailable = null, itemAvailable = null } = {}) {
   const sch = scheduleFor(gd, round);
   const fams = Array.isArray(sch.families) && sch.families.length ? sch.families.map((f) => [f.family, f.weight]) : [['supply', 1]];
   let family = weightedPick(rng, fams) || 'supply';
   const n = Number.isInteger(sch.cards) && sch.cards > 0 ? Math.min(sch.cards, 6) : formatCount(gd);
-  const opts = { stageId, bondAvailable, round };
+  const opts = { stageId, bondAvailable, round, itemAvailable };
   let cards = buildCards(gd, rng, family, n, sch, opts);
   if (!cards.length && family !== 'supply') { family = 'supply'; cards = buildCards(gd, rng, family, n, sch, opts); }
   if (!cards.length) return null;
@@ -328,16 +328,17 @@ function bountyDraftCards(gd, rng, n, sch, round) {
  * the nearest lower one, then any) — so one item can fill two slots. Positions shuffled; `n` < the slots (solo) keeps
  * `n` of them. Null without a usable `shopDraft` or at a round its `rounds` (when given) does not list.
  */
-export function shopDraftCards(gd, rng, n, round = null) {
+export function shopDraftCards(gd, rng, n, round = null, itemAvailable = null) {
   const spec = gd.choices.shopDraft;
   const slots = spec && Array.isArray(spec.slots) ? spec.slots.filter((x) => x && typeof x === 'object') : [];
   if (!slots.length) return null;
   if (Array.isArray(spec.rounds) && !spec.rounds.includes(round)) return null;
   const w = spec.itemWeights && typeof spec.itemWeights === 'object' ? spec.itemWeights : {};
   const coin = typeof spec.coin === 'string' && gd.item(spec.coin) ? spec.coin : null;
+  const free = list => itemAvailable ? list.filter(itemAvailable) : list;
   const ofTier = (t) => {
-    for (let k = t; k >= 1; k--) if ((gd.shopItemsByTier[k] || []).length) return gd.shopItemsByTier[k];
-    return eligibleItems(gd, 1, 6);
+    for (let k = t; k >= 1; k--) { const list = free(gd.shopItemsByTier[k] || []); if (list.length) return list; }
+    return free(eligibleItems(gd, 1, 6));
   };
   const out = [];
   for (const slot of slots) {
@@ -382,10 +383,10 @@ export function tacticDraftCards(gd, rng, n, { stageId = null, bondAvailable = n
   return out;
 }
 
-function buildCards(gd, rng, family, n, sch, { stageId = null, bondAvailable = null, round = 1 } = {}) {
+function buildCards(gd, rng, family, n, sch, { stageId = null, bondAvailable = null, round = 1, itemAvailable = null } = {}) {
   if (family === 'bounty') return bountyDraftCards(gd, rng, n, sch, round);
   if (family === 'shop') {
-    const cards = shopDraftCards(gd, rng, n, round);
+    const cards = shopDraftCards(gd, rng, n, round, itemAvailable);
     if (cards) return cards;
   }
   if (family === 'supply' || family === 'shop') {
@@ -393,7 +394,9 @@ function buildCards(gd, rng, family, n, sch, { stageId = null, bondAvailable = n
     let hi = 6;
     if (family === 'supply' && Array.isArray(sch.supplyTiers) && sch.supplyTiers.length === 2) [lo, hi] = sch.supplyTiers;
     let list = eligibleItems(gd, lo, hi);
+    if (itemAvailable) list = list.filter(itemAvailable);
     if (!list.length) list = eligibleItems(gd, 1, 6);
+    if (itemAvailable) list = list.filter(itemAvailable);
     const out = [];
     for (let i = 0; i < n && list.length; i++) out.push(itemCard(gd, list[Math.floor(rng() * list.length)]));
     return out;