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.

shared/constants.js

@@ -5,7 +5,7 @@ import { N_ } from './i18n.js';
 export const PROTOCOL_VERSION = 1;
 /** Release version shown to players (title screen, server banner, /healthz). Kept equal to package.json "version"
  * (test/version.test.js); PROTOCOL_VERSION above is the separate wire-format number. */
-export const APP_VERSION = '0.2.3';
+export const APP_VERSION = '0.2.4-dev';
 /** A development build (the public `dev` branch): the title screen, the boot banner and the README say so, and
  * tools/package.mjs refuses to build a release zip from it without --allow-dev. */
 export const DEV_BUILD = /-dev$/.test(APP_VERSION);

shared/summonPlacement.js

@@ -0,0 +1,9 @@
+// Placement ranges that are independent of the summoner's attack range. Jessica's T1 in backups.json and PRTS
+// 涤火杰西卡 / 天赋 says her shield may only stand on the four tiles next to her; op-jesca2.js already treats this as
+// a prep placement rule. This symmetric grid uses the same rotation/translation helpers as owner-range summons.
+const ADJACENT = Object.freeze([[0, 1], [1, 0], [0, -1], [-1, 0]].map((p) => Object.freeze(p)));
+
+/** @returns {ReadonlyArray<ReadonlyArray<number>> | null} A fixed placement grid, or null to use the token's flags. */
+export function summonPlacementGrid(tokenId) {
+  return tokenId === 'token_10032_jesca2_jckshd' ? ADJACENT : null;
+}