Add chapter overview briefing menu

scripts/core/campaign_state.gd

@@ -650,6 +650,33 @@ func get_scenario_count_in_chapter(scenario_id: String) -> int:
 	return scenario_ids.size()
 
 
+func get_chapter_progress_entries() -> Array:
+	var entries := []
+	for chapter_index in range(chapter_order.size()):
+		var chapter_id := chapter_order[chapter_index]
+		var scenario_ids: Array = chapter_scenario_ids.get(chapter_id, [])
+		var completed_count := 0
+		var current_in_chapter := false
+		var current_scenario_title := ""
+		for scenario_id in scenario_ids:
+			if completed_scenarios.has(scenario_id):
+				completed_count += 1
+			if scenario_id == current_scenario_id:
+				current_in_chapter = true
+				current_scenario_title = get_scenario_title(scenario_id)
+		entries.append({
+			"id": chapter_id,
+			"title": str(chapter_titles.get(chapter_id, chapter_id)),
+			"position": chapter_index + 1,
+			"chapter_count": chapter_order.size(),
+			"completed": completed_count,
+			"total": scenario_ids.size(),
+			"current": current_in_chapter,
+			"current_scenario_title": current_scenario_title
+		})
+	return entries
+
+
 func get_next_scenario_id(scenario_id: String) -> String:
 	var index := scenario_order.find(scenario_id)
 	if index == -1 or index + 1 >= scenario_order.size():