feat: 添加出牌动画和牌型排序显示

- 修复 AI decide 方法参数类型为 Array[Card]
- 添加 cards_played 和 player_passed 信号
- 出牌时在桌面中央显示排序后的卡牌
- 过牌时清除桌面牌
- 添加延迟动画效果（0.8秒显示，0.5秒清除）
- 添加 TableLabel 作为出牌显示区域
- 出牌按 rank 排序显示

🤖 Generated with [Qoder][https://qoder.com]

src/ui/scenes/training_room.gd

@@ -1,6 +1,9 @@
 extends Control
 
+const CARD_NODE_SCENE := preload("res://src/ui/components/card_node.tscn")
+
 var controller: TrainingController
+var table_cards: Array[CardNode] = []
 
 @onready var hand_area := $ScrollContainer/HandArea as HandArea
 @onready var play_button: Button = $Buttons/PlayButton
@@ -8,6 +11,7 @@ var controller: TrainingController
 @onready var hint_button: Button = $Buttons/HintButton
 @onready var status_label: Label = $StatusLabel
 @onready var guide_label: Label = $GuideLabel
+@onready var table_label: Label = $TableLabel
 
 func _ready() -> void:
 	if play_button:
@@ -26,6 +30,8 @@ func start_training() -> void:
 	controller.turn_ready.connect(_on_turn_ready)
 	controller.state_changed.connect(_refresh_ui)
 	controller.game_ended.connect(_on_game_ended)
+	controller.cards_played.connect(_on_cards_played)
+	controller.player_passed.connect(_on_player_passed)
 	_update_guide_text()
 	_refresh_ui()
 
@@ -58,17 +64,7 @@ func _on_play_pressed() -> void:
 			status_label.text = "❌ %s" % error_msg
 		return
 	hand_area.clear_selection()
-	if status_label:
-		status_label.text = "✓ 出牌成功！"
-	_refresh_ui()
-
-func _get_error_message(error_code: int) -> String:
-	match error_code:
-		1: return "无效的牌型组合"
-		2: return "不是你的回合"
-		3: return "不能过牌（你是领出者）"
-		4: return "牌不在手中"
-		_: return "出牌失败"
+	# 不立即刷新，等 cards_played 信号触发刷新
 
 func _on_pass_pressed() -> void:
 	var result := controller.handle_human_pass()
@@ -79,8 +75,63 @@ func _on_pass_pressed() -> void:
 		return
 	if status_label:
 		status_label.text = "✓ 已过牌"
+
+func _on_cards_played(player_idx: int, play: HandEvaluator.EvaluatedPlay) -> void:
+	# 显示出的牌
+	_show_table_cards(play.cards)
+	var player_name := controller.game_state.player_names[player_idx]
+	var type_name := _get_type_name(play.type)
+	if status_label:
+		status_label.text = "%s 出了 %s（%d张）" % [player_name, type_name, play.cards.size()]
+	
+	# 延迟刷新手牌，让玩家看到出牌效果
+	await get_tree().create_timer(0.8).timeout
 	_refresh_ui()
 
+func _on_player_passed(player_idx: int) -> void:
+	var player_name := controller.game_state.player_names[player_idx]
+	if status_label:
+		status_label.text = "%s 过牌" % player_name
+	# 清除桌面牌
+	_clear_table_cards()
+	await get_tree().create_timer(0.5).timeout
+	_refresh_ui()
+
+func _show_table_cards(cards: Array[Card]) -> void:
+	_clear_table_cards()
+	# 按 rank 排序
+	var sorted_cards: Array[Card] = cards.duplicate(false)
+	sorted_cards.sort_custom(func(a: Card, b: Card): return a.compare_to(b) < 0)
+	
+	var total_width := sorted_cards.size() * 60
+	var start_x := (1280 - total_width) / 2
+	
+	for i in range(sorted_cards.size()):
+		var card: Card = sorted_cards[i]
+		var node := CARD_NODE_SCENE.instantiate() as CardNode
+		if node == null:
+			continue
+		table_label.add_child(node)
+		node.setup(card)
+		node.position = Vector2(start_x + i * 60, 80)
+		node.custom_minimum_size = Vector2(55, 80)
+		node.size = Vector2(55, 80)
+		node.mouse_filter = Control.MOUSE_FILTER_IGNORE
+		table_cards.append(node)
+
+func _clear_table_cards() -> void:
+	for cn in table_cards:
+		cn.queue_free()
+	table_cards.clear()
+
+func _get_error_message(error_code: int) -> String:
+	match error_code:
+		1: return "无效的牌型组合"
+		2: return "不是你的回合"
+		3: return "不能过牌（你是领出者）"
+		4: return "牌不在手中"
+		_: return "出牌失败"
+
 func _on_hint_pressed() -> void:
 	var hint := controller.get_hint()
 	if hint == null or hint.type == -1:
@@ -114,10 +165,12 @@ func _get_type_name(type_idx: int) -> String:
 		_: return "未知"
 
 func _on_game_ended(winner_team: int, _reason: String) -> void:
-	if status_label: status_label.text = "游戏结束! 队伍 %d 获胜" % winner_team
-	if hand_area: hand_area.disable_input()
+	if status_label:
+		status_label.text = "游戏结束! 队伍 %d 获胜" % winner_team
+	if hand_area:
+		hand_area.disable_input()
 
 func _refresh_ui() -> void:
 	if controller and controller.game_state and hand_area:
-		var hand: Array = controller.game_state.get_hand(0)
+		var hand: Array[Card] = controller.game_state.get_hand(0)
 		hand_area.update_hand(hand)