fix: resolve tab chars, typing, and parse errors in UI and game controller

src/core/move_generator.gd

@@ -16,10 +16,12 @@ static func generate(hand: Array[Card], current_rank: int, config: RuleConfig) -
     results.append(pass_play)
     if hand.is_empty():
         return results
-    var sorted := hand.duplicate(false)
+    var sorted: Array[Card] = []
+    for item: Card in hand:
+        sorted.append(item)
     _sort(sorted)
     var seen_ranks := {}
-    for c in sorted:
+    for c: Card in sorted:
         var rk := c.rank()
         if seen_ranks.get(rk, 0) < 4:
             var ep := HandEvaluator.evaluate([c], current_rank, config)

src/game/game_controller.gd

@@ -94,11 +94,11 @@ func _next_alive_player() -> void:
             return
 
 func _trigger_ai(player_idx: int) -> void:
-    var ai := ai_players.get(player_idx)
+    var ai: BaseAI = ai_players.get(player_idx) as BaseAI
     if ai == null:
         return
     var hand8: Array = game_state.get_hand(player_idx)
-    var decision := ai.decide(hand8, game_state.round.table, game_state.current_rank, game_state.rule_config)
+    var decision: HandEvaluator.EvaluatedPlay = ai.decide(hand8, game_state.round.table, game_state.current_rank, game_state.rule_config)
     if decision.type == -1:
         _apply_play(player_idx, decision)
     else:

src/ui/components/card_node.gd

@@ -1,8 +1,8 @@
 class_name CardNode
 extends Control
 
-signal card_clicked(card_node)
-signal card_double_clicked(card_node)
+signal card_clicked(card_node: CardNode)
+signal card_double_clicked(card_node: CardNode)
 
 var card_data: Card = null
 var is_selected: bool = false

src/ui/components/hand_area.gd

@@ -18,7 +18,7 @@ func update_hand(hand: Array) -> void:
     card_nodes.clear()
     selected_cards.clear()
     for c in hand:
-        var node: CardNode = CARD_SCENE.instantiate()
+        var node := CARD_SCENE.instantiate() as CardNode
         node.setup(c)
         node.card_clicked.connect(_on_card_clicked)
         node.card_double_clicked.connect(_on_card_double_clicked)