Add officer portrait defaults

scripts/core/battle_state.gd

@@ -2492,10 +2492,14 @@ func _normalize_dialogue_line(line) -> Dictionary:
 		var text := str(line.get("text", ""))
 		if text.is_empty():
 			return {}
+		var speaker := str(line.get("speaker", ""))
+		var portrait := str(line.get("portrait", ""))
+		if portrait.is_empty():
+			portrait = data_catalog.get_portrait_for_speaker(speaker)
 		return {
-			"speaker": str(line.get("speaker", "")),
+			"speaker": speaker,
 			"text": text,
-			"portrait": str(line.get("portrait", ""))
+			"portrait": portrait
 		}
 	return {}