Add core game retry flow and question stats

scripts/ui/study_map.gd

@@ -41,7 +41,7 @@ func _refresh_zones() -> void:
 
 	if QuestionBankService.is_loading:
 		var loading := Label.new()
-		loading.text = "Loading question bank..."
+		loading.text = "Question API unavailable. Retrying in %d seconds..." % QuestionBankService.next_retry_seconds if QuestionBankService.load_state == "retrying" else "Loading question bank..."
 		Style.set_label(loading, 20, Style.AMBER)
 		zone_list.add_child(loading)
 		return
@@ -52,6 +52,13 @@ func _refresh_zones() -> void:
 		empty.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
 		Style.set_label(empty, 20, Style.RED)
 		zone_list.add_child(empty)
+
+		var retry := Button.new()
+		retry.text = "Retry Questions"
+		retry.custom_minimum_size = Vector2(220, 54)
+		Style.style_chip(retry, Style.AMBER)
+		retry.pressed.connect(QuestionBankService.retry_now)
+		zone_list.add_child(retry)
 		return
 
 	var systems: Array[String] = ["All Systems"]