WIP: in-flight combat/expedition/flavor changes

Bundle of uncommitted working-tree edits across combat engine, expedition
cycle, flavor pools, and TwinBee/zone narration. Includes new files:
combat_debug.go, dnd_boss_consumables.go, dnd_dex_floor.go, plus
CHANGES_24H.md and REBALANCE_NOTES.md scratch notes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/plugin/combat_debug.go

@@ -0,0 +1,44 @@
+package plugin
+
+import (
+	"fmt"
+	"log/slog"
+	"os"
+	"strings"
+)
+
+// dumpCombatEventsIfDebug logs every event in a CombatResult to slog.Info
+// when GOGOBEE_COMBAT_DEBUG=1 is set. Renders one event per line in a
+// compact form: "[round phase actor.action] hp=P/E roll=R vsAC=V dmg=D desc".
+//
+// Used to diagnose ghost damage / dropped events: the renderer silently
+// returns "" for unknown actions, which makes damage that hit the engine
+// state but never reached the chat invisible. This dump shows everything.
+func dumpCombatEventsIfDebug(label string, result CombatResult) {
+	if os.Getenv("GOGOBEE_COMBAT_DEBUG") != "1" {
+		return
+	}
+	var b strings.Builder
+	b.WriteString(fmt.Sprintf("\n=== combat dump: %s ===\n", label))
+	b.WriteString(fmt.Sprintf("PlayerStartHP=%d PlayerEntryHP=%d EnemyStartHP=%d EnemyEntryHP=%d PlayerEndHP=%d EnemyEndHP=%d won=%v\n",
+		result.PlayerStartHP, result.PlayerEntryHP, result.EnemyStartHP, result.EnemyEntryHP,
+		result.PlayerEndHP, result.EnemyEndHP, result.PlayerWon))
+	prevP := result.PlayerEntryHP
+	if prevP == 0 {
+		prevP = result.PlayerStartHP
+	}
+	prevE := result.EnemyEntryHP
+	if prevE == 0 {
+		prevE = result.EnemyStartHP
+	}
+	for i, e := range result.Events {
+		dp := e.PlayerHP - prevP
+		de := e.EnemyHP - prevE
+		b.WriteString(fmt.Sprintf("  %3d [r%d %s %s.%s] hp=%d/%d (Δp=%+d Δe=%+d) roll=%d vsAC=%d dmg=%d desc=%q\n",
+			i, e.Round, e.Phase, e.Actor, e.Action, e.PlayerHP, e.EnemyHP, dp, de,
+			e.Roll, e.RollAgainst, e.Damage, e.Desc))
+		prevP, prevE = e.PlayerHP, e.EnemyHP
+	}
+	b.WriteString("=== end dump ===\n")
+	slog.Info("combat debug dump", "log", b.String())
+}