feedback1c WJ: Hidden Core damage broadcasts count only the hidden leader

Player report: "隐藏boss还没打就出了造成50%伤害播报". The BOSS_HIT ticker
("{0}博士对敌方领袖造成的伤害超过20/50/80%!") divided the player's boss damage of
the whole match (stats.bossDamage, Final Assault + Hidden Core) by the hidden
leader's pool, so the Hidden Core's first hit already announced 50 % or 80 %.
The share is now the player's damage to the current round's pool
(SharedBossPool.byPlayer) over its size; 领袖伤害 on the result keeps both rounds.

The browser's ticker strip plays its queue 5.2 s per line, so a Final Assault
line could still play over the fresh hidden leader: a BOSS_HIT line is now
dropped once the round it came in is over (ui/ticker.js tickerLineLive; lines
carry their type and round from main.js).

docs/META.md

@@ -592,8 +592,11 @@ is called without protocol validation); 1 per second per player (`RATE`).
 Tickers (`m.ticker { text, id, type, priority, playerId }`) from `config.broadcasts`: SHOP_LEVEL, GOLDEN_CHAR,
 CHAR_DAMAGE (per board unit per battle, highest threshold; summons created in battle once per unit type — a client
 result may only name the unit types its lineup can field, fields.js validateClientResult), BOSS_HIT (20/50/80 % of the
-pool per player), CHAR_GIFT (to the
-receiver only), plus CUSTOM texts (eliminations, 联防, hidden core).
+current leader per player, each threshold once per boss round: the player's damage to that round's shared pool,
+`SharedBossPool.byPlayer`, over its size — the Final Assault and the Hidden Core count apart, while `stats.bossDamage`,
+the result's 领袖伤害, adds both up; the browser's strip, which plays its queue 5.2 s per line, drops a BOSS_HIT line
+once the round it came in is over — public/js/ui/ticker.js `tickerLineLive`), CHAR_GIFT (to the receiver only), plus
+CUSTOM texts (eliminations, 联防, hidden core).
 
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