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.

docs/DATA.md

@@ -109,7 +109,8 @@ Top level: `{ season, seasonName, modes, economy, lpCapPerRound, bossOvertimeAft
 | `itemSellable`, `itemDestroyRefund` | `false`, `0` | items can only be destroyed |
 | `benchSize`, `tempSize`, `deployCap`, `storeCntMax` | `10`, `5`, `8`, `6` | |
 | `equipPerChess`, `maxArtsPerRound` | `2`, `2` | |
-| `poolCopies[tier]` + `poolCopiesOverrides` | `{"1":12,"2":14,"3":18,"4":16,"5":8,"6":5}`, `{"chess_char_6_11_a":4}` (缪尔赛思) | shared pool copies per base chess |
+| `poolCopies[tier]` + `poolCopiesOverrides` | 12/14/18/16/8/5 plus measured low-tier identity exceptions (DESIGN §29.8) | single-player copies; `coopPoolMultiplier: 2` doubles shared operators, not private DIY stock |
+| `itemPoolCopies[tier]` + `itemPoolCopiesOverrides` | 4/6/7/8/7/3 plus eight measured exceptions (DESIGN §29.8) | shared shop-equipment ownership: normal 1, upgraded 2; non-shop effect-only equipment unlimited |
 | `goldenCopies`, `mergeCount`, `mergeCountOverrides`, `itemMergeCount` | `3`, `3`, `{"chess_char_2_11_a":2}` (风丸), `2` | |
 | `rewardOffer` | `{"count":3,"tierOffset":1,"maxTier":6,"price":0,…}` | merge reward: 3 **different** free chess of tier `min(shopLevel+1,6)` (a short tier tops up from the tier below; `PlayerState.pushRewardOffer`, user playtest #6 item 19) |
 | `handFillOrder` | `"rightToLeft"` | |