Holiday switch in the debug menu; darker wood for the treasury chests

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/hr.lang

@@ -389,6 +389,10 @@ set.debug_ping = Prikaži ping
 set.debug_trigger_zones = Prikaži zone okidača
 set.debug_command_markers = Prikaži debug oznake naredbi
 set.debug_path_lines = Prikaži linije putanja
+set.debug_holiday = Blagdan
+val.halloween = Halloween
+val.christmas = Božić
+val.easter = Uskrs
 
 hint.pickup_prisoner_where = Zarobljenici se mogu podići samo na tvom teritoriju.
 hint.punch_where = Ruka može udarati junake samo na tvom teritoriju.