feedback5: merge CB2 — community reports (healers / summons): 刺玫's S2 heals the most injured ally again (the counter's heal alone goes to her protégé), 琳琅诗怀雅 heals herself and her 破财消灾 cost restarts at 5 DP with every deployment, 赫默's S2 casts at full SP so the drone takes the field at once, the countdown summons (医疗探机, 诅咒娃娃, 海嗣 and four 自选 ones) take no damage, are never healed and show the life left on their bar, stacked ground areas stay readable; §25.16 after CB5's §25.19 (renumbered with the later merges); golden: vs feedback5 CB2's own rules — roster-001/002/003/005/008/016/018/027/035/037/045/046/049, bond-deputShip-low/high, bond-suntShip-high, bond-victoriaShip-low/high, bond-visiShip-low/high, boss-boss_1/3/5/7-pair, hidden-boss_9-pair, unite-1, matches solo-FUNNY-2, coop2-HARD-4, coop3-ABYSS-5, coop4-ABYSS-7, coop2-NORMAL-8-serverrun, coop2-ABYSS-10-boosted, coop2-NORMAL-14-standins; vs CB2 exactly CB5's 18 bot matches

Merge fixes (the three tests the trial merge failed):
- test/content/summon_loadout_conflicts.test.js (赫默's drone lifetime per module variant): it asserted "no cast yet"
  after the drone's redeploy time and then cast S2 by hand — with nobody hurt the old DEFAULT rule never cast. S2 now
  casts by itself the tick its SP is full (22 s), which is the official rule (client skill skchr_silent_2: no
  `_trigger`, `_allowNoTarget` 1, `_checkHasTargetBeforeDoCast` 0; CB2 64f8bf9), so the test waits for that cast and
  checks both drones' lifetimes from it. Failed on fb5-cb2 itself (the stream did not run the file).
- test/sim/feedback1f-downed-tile.test.js (F5 rule 3): its "killed" case killed 浊心斯卡蒂's 海嗣 with 1e9 true damage;
  the 海嗣 is a countdown summon now — 无敌 + 禁疗, the official state (PRTS 海嗣 备注 「持有禁疗、无敌」) — so it only
  expires. The killed case takes 缪尔赛思's 流形 (a placed board summon that is attacked and killed and also comes back on
  its tile 25 s later); both cases now also check the summon's return. Failed on fb5-cb2 itself.
- test/golden-standins.test.js (the 补位 match fields at least 3 different stand-ins): already failing on feedback5
  37558f0 — CB5's 调度中心 upgrade card changed the human seat's shop in coop2-NORMAL-14-standins, which then fielded
  only 2 of its 7 not-owned chess (忍冬 → Sharp, 安洁莉娜 → Raidian). tools/golden.mjs MATCH_NOT_OWNED adds 缄默德克萨斯
  and 铃兰 (chess its AI fields now): 4 stand-ins (Sharp from round 4, Misery from 7, 预备干员-辅助 from 9, Raidian in 12);
  the test is unchanged, test/golden/README.md says 9 chess. This moves coop2-NORMAL-14-standins only.
- docs/history/0.2.0.md: the §25 intro's two stream lines joined into one sentence (the merge had cut it).

Golden moves outside CB2's commit list are CB2's rules on the paths CB5 gave the bots: coop2-HARD-4 fields 琳琅诗怀雅
from round 6, coop2-NORMAL-8-serverrun 刺玫 from round 7, coop2-ABYSS-10-boosted 刺玫 from round 2,
coop2-NORMAL-14-standins 刺玫 from round 3 and 琳琅诗怀雅 in rounds 6-7 (instrumented); coop2-NORMAL-3 and coop4-FUNNY-6
(in CB2's list) still field 刺玫 and her S2 heals now reach other allies (36 / 205 heals), but no kill, leak, LP or
end stat changes, so their digests stay.

Gate: non-browser suites 4949 / 4949, npm run golden ok (283 scenarios), test/golden.test.js 9 / 9, lint 0 errors,
check:imports ok, typecheck ok.

docs/design/network.md

@@ -23,7 +23,7 @@ S→C:
 - NOTE: game time in `b.snap`/`b.ev` is carried as **`gt`** (the frame's `t` is the message type).
 - Active finite zero-SP timed skills display `sp=timeLeft`, `spMax=duration` and `UF.SKILL`; after end they display
   `0/0`. Snapshot display capacity does not change runtime SP/cost.
-- `b.snap` — `{ fieldId, gt, units: [[id, x, y, hp, maxHp, sp, spMax, flags, anim]] , dp, killed, total, down?, elem? }` 20 Hz. Optional, only when non-empty (§18.3): `down: [[id, respawnAt (game s), respawnTime (s), state, row, col]]` — knocked-out operators waiting to redeploy, `state` 0 counting | 1 timer done, waiting for DP | 2 timer done, its tile taken — a safeguard, no ally deploys there (sim/constants.js `DOWN_STATE`); `row, col` = the tile it lies on and comes back on (§21.24); `elem: [[id, element, fill, cooldownEnd (game s), cooldown (s)]]` — the one gauge a unit shows: the fullest (ties by the official element id 神经 < 侵蚀 < 灼燃 < 凋亡), fill with 2 decimals rounded DOWN and kept at 0.01–0.99 outside a burst (§20.8); during a 爆发冷却 the bursting element with fill 1 and the cooldown numbers (else 0, 0)
+- `b.snap` — `{ fieldId, gt, units: [[id, x, y, hp, maxHp, sp, spMax, flags, anim]] , dp, killed, total, down?, elem? }` 20 Hz (a countdown summon's `hp` is maxHp × the share of its life left, §25.16.5). Optional, only when non-empty (§18.3): `down: [[id, respawnAt (game s), respawnTime (s), state, row, col]]` — knocked-out operators waiting to redeploy, `state` 0 counting | 1 timer done, waiting for DP | 2 timer done, its tile taken — a safeguard, no ally deploys there (sim/constants.js `DOWN_STATE`); `row, col` = the tile it lies on and comes back on (§21.24); `elem: [[id, element, fill, cooldownEnd (game s), cooldown (s)]]` — the one gauge a unit shows: the fullest (ties by the official element id 神经 < 侵蚀 < 灼燃 < 凋亡), fill with 2 decimals rounded DOWN and kept at 0.01–0.99 outside a burst (§20.8); during a 爆发冷却 the bursting element with fill 1 and the cooldown numbers (else 0, 0)
 - `b.ev` — `{ fieldId, ev: [ ... ] }` event tuples: `['spawn', UnitInfo]`, `['atk', srcId, tgtId, projKind]`, `['dmg', tgtId, amount, type]`, `['heal', tgtId, amount]`, `['skill', id, on:0|1]`, `['die', id, reason]` (reason `'killed'`, `'retreat'`, `'expired'` …; only `'killed'` plays an operator's knock-down sound), `['status', id, key, on]`, `['fx', kind, x, y, extra]` (`'hitCap' {id, n}` = a cancelled 限伤 hit, drawn as nothing, §20.12; `extra.form` = the unit's model form from then on (an enemy's mode, a 傀儡师's 替身 §22.11) — `shared/protocol.js fxForm`, state like a spawn: never dropped by the client, §21.4), `['layer', playerId, bondId, n]`, `['bounty', playerId, coins]`, `['deploy', id]`
 - `m.toast {kind, text}` · `m.ticker {text, id, type, priority, playerId}` (the strip plays the highest priority first, §21.10) · `m.emote {playerId, id}` · `m.result {...}`
 - `m.unitStats {seq, round, units: [unitStatsEntry]}` — the answer to `g.unitStats` (`seq` echoed): every own board operator / summon by uid with `{id, uid, defId, hp, alive, maxHp, atk, def, res, interval, blockCnt, moveSpeed, range?, base: {…same}}` (shared/protocol.js `unitStatsEntry`; `range` = an ally's live range grid, facing RIGHT, never a target-selection grid, §21.16) as its next battle starts (§18.5)