feedback7 R22-LATE: 画卷 never puts the copied items on the copy — they are gained unequipped into the hand / temp like any item; golden: unchanged

PRTS 卫戍协议：盟约 PRTS盟约记录, 法术编纂集, 画卷 备注: 「选择策略<夕>时可获得<br>使用后销毁，获得的装备为未装备状态」.
Without a promotion the 画卷 handler still equipped every copied item that did not merge (an advanced item, a
变形同构体) onto the copy in the hand (the promotion case was fixed for #389). Now each copied item is only gained
(ctx.grantItem → acquireItem): the hand, overflow temp, and with both full it is destroyed with the usual toast
「整备区已满，获得的装备已销毁」, as for any gained item. A copied normal item that completes a pair still merges at once
(the golden in the hand), and the copy itself still follows the chess gain rules (a full hand and temp refuse the
scroll: HAND_FULL, the scroll kept). Full-hand check: a full hand with 3 free temp slots holds the copy and both
copied advanced items; with 2 free slots the copy and one item fit and the other is destroyed with the toast (before,
both rode on the copy).

Docs: META.md (Arts list), research/04-items.md (画卷 copy). The content test that pinned the old behaviour
(test/content/items.test.js: 变形同构体 "the copy wears it too") now expects it in the hand.
Tests: test/match/scroll-copy-merge.test.js +3 (no promotion, normal and elite targets with advanced items; the full
hand at 3 / 2 free temp slots) — all 3 fail on the parent; every test mentioning 画卷: 177 pass. Golden unchanged.

docs/research/04-items.md

@@ -352,7 +352,7 @@ Combo check: `equip_chess_id` in blackboard is the partner's id WITHOUT the `_a/
 
 - Buff keys: 画卷 `trap_copy_front_char{}`; 教鞭 `trap_create_self_choice{choice_event=hunter_band_1}`; 神秘顾客 additionally `trap_disney_special{count=1}`.
 - `hunter_band_1` (choiceType PERSONAL_CHOOSE, "悬赏决策") pool is server-side. [ASSUMED] offer 3 random `enemyeffect_b_*` bounties (e.g. 碎骨·悬赏 +1, 萨卡兹百夫长·悬赏 +2, 泥岩·悬赏 +4, 锏·悬赏 +5, “复仇者”·悬赏 +6 funds; buff `add_enemy_kill_gain_coin{count,enemy_id,coin,round=1}`): adds 1 enemy to your next battle, killer gets `coin` funds.
-- 画卷 copy: duplicates the operator (same chess id incl. elite `_b`) AND clones its equipped items into the copy [DATA desc "包括精锐状态和装备"]; copy goes to hand [ASSUMED]; if hand full -> temporary hand.
+- 画卷 copy: duplicates the operator (same chess id incl. elite `_b`) AND its equipped items [DATA desc "包括精锐状态和装备"]; the copied items arrive unequipped (PRTS 画卷 备注 "使用后销毁，获得的装备为未装备状态"), gained like any item — the hand, overflow temp (destroyed with the usual toast when both are full); copy goes to hand [ASSUMED]; if hand full -> temporary hand.
 
 ## 8. Item sources other than the shop [DATA]