feedback1 WB: bounty drafts offer the cards of their half (late bounty enemies no longer in the R3 draft)

Player report #2: boss bounties, second-half specials and their upgraded copies
showed up in the first 悬赏决策 draft. A draft up to R7 (the official wave
generator's first half) now offers the 接下来两场作战 cards, a draft from R8 the
下场作战 and multi-round cards, with no tier window (the official late draft
screenshot shows boss bounties worth 1 to 6 together). choices.json cards.bounty
draftHalf, schedule bountyHalf; the mode's inactive enemy list no longer thins
the bounty draft (PRTS 11/18 note).

server/match/waves.js

@@ -122,7 +122,9 @@ function placeholderMap(gd) {
   return out;
 }
 
-const firstHalfMax = (gd) => intOr(gen(gd).firstHalfMaxRound, Math.floor(intOr(gen(gd).maxLevelCnt, 15) / 2));
+/** Last round of the official generator's first half (factions.generation.firstHalfMaxRound: maxLevelCnt / 2 = 7); also
+ * the half of the 悬赏决策 drafts (choices.js bountyDraftHalf). */
+export const firstHalfMax = (gd) => intOr(gd && gd.factions ? gen(gd).firstHalfMaxRound : null, Math.floor(intOr(gd && gd.factions ? gen(gd).maxLevelCnt : null, 15) / 2));
 
 /** The special entry list (factions.json entries) sorted by key. */
 function entryList(gd) {