0.2.5-dev: community round 30 and follow-ups

- Stock: fixed trait gifts (缪尔赛思 / 变形者集群 变形同构体, 耶拉 不融冰, 蜜蜡 / 卡涅利安 迅捷作战粮, 诗怀雅 盟约之币) still occupy stock but are granted past the cap; an operator card already shown in the shop or a reward can be taken after the pool runs out and overdraws (GitHub #498, the owner's decision); item buys and item rewards keep the stock check. 洛洛 / 焰尾 sub-pools use the measured weights (PR #497 by @2321Robin; the occupancy idea of PR #496 by @2321Robin re-implemented differently).
- Boss pairs are drawn at random once per match and fixed to battle start; the Hidden Core reuses them; a leaver does not split a full pair (the owner's decision).
- 阿戈尔 in 联防 no longer re-applies the opening devour HP loss or a false revive; Touch's team medic stays for the match after its holder leaves (owner-approved, official lifetime unverified).
- Auto-skill ranges: 司霆惊蛰 S2, 斩业星熊 S3 against air, 予愿安洁莉娜 S3; 自在's post-rebirth invulnerability is also untargetable (#510); Horn / Clementia / catapult / 忍冬 first hit (PR #502 by @Xinglan233); 不融冰 / tear gas trigger on real damage.
- Bond layer-up sound in round start / draft / prep / battle (#482): one channel, a new cue replaces the old, no extra cooldown; a prep update that adds layers and activates a bond plays one cue.
- Client: multi-swing fix (#506), refresh single-flight (PR #507 by @robll-v1), LP tower keeps the settled value with a −N tick (PR #504 by @robll-v1), export with only 潜能 / 练度 changes (PR #503 by @Xinglan233), spectator rosters list DIY members (PR #505 by @Xinglan233), banned members beside bond tooltips (PR #494 by @YuriRestia), recovery action above the away overlay (PR #511 by @RainoutOvO), the /dev/sim-check.html consistency page (PR #492 by @Cloudnyco), Korean (PR #490 by @D-Roote) and English Victoria wording (PR #499 by @YuriRestia).
- golden: 45 of 287 scenarios move against 0.2.4 (roster 17, bonds 3, fields 6, matches 17, standins 2), each attributed in docs/history/0.2.5.md §30.9 / §30.16.

test/match/shared-stock.test.js

@@ -7,6 +7,33 @@ import { cardPickable } from '../../public/js/ui/choiceOverlay.js';
 
 const PACK = 'chess_item_5_07_e_a';
 const byName = name => Object.values(DATA.chess).find(c => !c.isGolden && c.name === name).chessId;
+
+test('four already displayed operator offers may exceed stock; selling first repays the deficit', () => {
+  const h = makeMatch({ mode: 'coop', humans: 4, seed: 11, fake: true }).start().toPrep();
+  const m = h.m, id = byName('溯光星源'), ps = [...m.players.values()];
+  assert.equal(m.pool.cap(id), 10);
+  for (let i = 0; i < 3; i++) for (let j = 0; j < 3; j++) ps[i].acquireChess(id);
+  assert.equal(m.pool.left(id), 1);
+  for (const p of ps) {
+    p.funds = 100;
+    p.shop.slots[0] = { kind: 'chess', id, basePrice: 3, frozen: true, sold: false };
+  }
+  assert.equal(m.pool.left(id), 1, 'displaying an offer does not reserve stock');
+  for (const p of ps) {
+    const funds = p.funds; assert.ok(p.buy(0).ok, 'every pre-existing offer stays purchasable');
+    assert.equal(p.funds, funds - 3); assert.equal(p.shop.slots[0].sold, true);
+    assert.equal(p.buy(0).error, 'SOLD_OUT', 'the same offer cannot be bought twice');
+  }
+  assert.equal(m.pool.entries.get(id).left, -3); assert.equal(m.pool.left(id), 0);
+  assert.equal(m.pool.roll(m.rngShop, { tier: 6, filter: candidate => candidate === id }), null);
+  for (let i = 0; i < 4; i++) {
+    const piece = ps[i].allChess().find(c => c.id === id); assert.ok(piece);
+    assert.ok(ps[i].sell(piece.uid).ok);
+    assert.equal(m.pool.left(id), Math.max(0, i - 2));
+    checkInvariants(m);
+  }
+  m.dispose();
+});
 test('a duplicate draft card becomes unavailable when the preceding player exhausts equipment stock', () => {
   const h = makeMatch({ mode: 'coop', humans: 2, seed: 11, fake: true }).start().toPrep();
   const m = h.m, a = h.ps('p_0'), b = h.ps('p_1');
@@ -29,6 +56,17 @@ test('measured operator capacities and exceptions: co-op doubles shared stock, n
   assert.equal(solo.itemPoolCopies(PACK), 2); assert.equal(coop.itemPoolCopies(PACK), 2);
 });
 
+test('an operator reward shown before stock exhaustion still arrives and records its copy', () => {
+  const h = makeMatch({ mode: 'coop', humans: 2, seed: 11, fake: true }).start().toPrep();
+  const m = h.m, a = h.ps('p_0'), b = h.ps('p_1'), id = byName('溯光星源');
+  a.pushRewardOffer('test', { ids: [id] });
+  for (let i = 0; i < m.pool.cap(id); i++) b.acquireChess(id);
+  assert.equal(m.pool.left(id), 0);
+  assert.ok(a.pickReward(0).ok); assert.equal(a.offers.length, 0);
+  assert.ok(a.allChess().some(c => c.id === id));
+  assert.equal(m.pool.entries.get(id).left, -1); checkInvariants(m); m.dispose();
+});
+
 test('shared equipment occupancy includes hand/equipped/elite, never displayed offers; destroying frees stock', () => {
   const h = makeMatch({ mode: 'coop', humans: 2, seed: 11, fake: true }).start().toPrep();
   const m = h.m, a = h.ps('p_0'), b = h.ps('p_1');