feedback7 UIBACK: upgrading the 调度中心 opens the new shop slot EMPTY — the next refresh or round start fills it; 0.2.0's fill-at-once (464a823, item 19) reverted (GitHub #332 and PR #333 by @2321Robin, official recording BV1AXwuzdEys 1:39 — authored by them: the economy.js change, the rewritten level-slots test and the docs hunks applied as reviewed, without the PR's UPGRADE_FILLS_NEW_SLOTS flag and LOCAL RULING comment: the empty slot is the rule): the shop bar draws a null operator slot as a bare dashed frame (EmptyCard, inert scard--sold) instead of the SOLD OUT 「已招募」 frame, one new UI string in the four packs; META.md §3 and §7 and PLAYING.md say so; the dev mock opens the slot empty and survives null slots; test/ui/shop-empty-slot.e2e.test.js; golden: only matches moves, all 18 (the bots' shop RNG stream) — end results changed in solo-FUNNY-1 defeat→victory, solo-NORMAL-1 and solo-HARD-1 victory→defeat, solo-HARD-2 and solo-ABYSS-1 defeat→eliminated, coop2-NORMAL-14-standins defeat→victory (2 distinct stand-ins fielded: golden-standins.test.js asks ≥ 2); roster, bonds, fields, standins, diy unchanged

public/dev/game-mock.js

@@ -593,7 +593,7 @@ async function mockRequest(t, f = {}) {
       prepOnly();
       if (p.shop.refreshPrice > p.funds) fail('NO_FUNDS');
       if (p.shop.freeRefreshes > 0) p.shop.freeRefreshes--; else p.funds -= 1;
-      const n = p.shop.slots.filter((s) => s.kind !== 'item').length;
+      const n = p.shop.slots.filter((s) => !s || s.kind !== 'item').length;
       p.shop.slots = [...Array.from({ length: n }, () => makeSlot(p.shop.level)), makeItemSlot()];
       refreshPrivate(); return {};
     }
@@ -604,7 +604,8 @@ async function mockRequest(t, f = {}) {
       if (p.shop.upgradePrice > p.funds) fail('NO_FUNDS');
       p.funds -= p.shop.upgradePrice; p.shop.level++; p.shop.upgradePrice = [5, 8, 11, 12, 13][p.shop.level - 1] ?? 0;
       const n = p.shop.level >= 4 ? 5 : 4;
-      while (p.shop.slots.filter((s) => s.kind !== 'item').length < n) p.shop.slots.splice(p.shop.slots.length - 1, 0, makeSlot(p.shop.level));
+      // the upgrade opens the new slot EMPTY (server/match/player/economy.js _openLevelSlots: a null slot; a refresh fills it)
+      while (p.shop.slots.filter((s) => !s || s.kind !== 'item').length < n) p.shop.slots.splice(p.shop.slots.length - 1, 0, null);
       toast(`调度中心等级提升至 ${p.shop.level}`, 'success');
       refreshPrivate(); return {};
     }