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.

test/render/assets.test.js

@@ -503,7 +503,8 @@ describe('createAssets store', () => {
 
   test('image cache + preload progress (failures resolve to null)', async () => {
     const loaded = [];
-    const a = createAssets({ manifest: M, loadImage: async (u) => { loaded.push(u); if (u.includes('bad')) throw new Error('x'); return { src: u }; } });
+    let fail = true;
+    const a = createAssets({ manifest: M, loadImage: async (u) => { loaded.push(u); if (u.includes('bad') && fail) throw new Error('x'); return { src: u }; } });
     const progress = [];
     const r = await a.preload(['/a.png', '/bad.png', '/a.png', null, ''], (d, t) => progress.push([d, t]));
     assert.deepEqual(r, { ok: 1, failed: 1, total: 2 });
@@ -513,6 +514,11 @@ describe('createAssets store', () => {
     assert.equal(loaded.filter((u) => u === '/a.png').length, 1, 'cached');
     assert.equal(a.imageNow('/a.png').src, '/a.png');
     assert.equal(await a.image(null), null);
+    fail = false;
+    assert.equal(await a.image('/bad.png'), null, 'ordinary consumers retain the remembered failure');
+    assert.equal((await a.image('/bad.png', { retry: true })).src, '/bad.png');
+    assert.equal(loaded.filter((u) => u === '/bad.png').length, 2, 'explicit board retry performs a new load');
+    assert.equal((await a.image('/bad.png')).src, '/bad.png');
   });
 
   test('spine acquire/release through the store with an injected loader', async () => {