feat(wiring): MobSpawner integration + take_damage API on dolphin

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scenes/mobs/MobSpawner.tscn

@@ -0,0 +1,6 @@
+[gd_scene load_steps=2 format=3]
+
+[ext_resource type="Script" path="res://scripts/mobs/MobSpawner.gd" id="1"]
+
+[node name="MobSpawner" type="Node3D"]
+script = ExtResource("1")

scripts/Main.gd

@@ -40,6 +40,15 @@ func _ready() -> void:
 	inventory.add_item(6, 5)   # 5 KELP
 	inventory.add_item(8, 2)   # 2 ICE
 
+	# Add dolphin to player group (for mob detection)
+	dolphin.add_to_group("player")
+
+	# Spawner de mobs
+	var MobSpawnerScene: PackedScene = load("res://scenes/mobs/MobSpawner.tscn")
+	var mob_spawner: Node3D = MobSpawnerScene.instantiate()
+	add_child(mob_spawner)
+	mob_spawner.player = mob_spawner.get_path_to(dolphin)
+
 
 func _process(_delta: float) -> void:
 	world.update_player_position(dolphin.global_position)

scripts/dolphin/DolphinController.gd

@@ -250,6 +250,13 @@ func _raycast(reach: float) -> Dictionary:
 	return result
 
 
+func take_damage(amount: float) -> void:
+	health = max(0.0, health - amount)
+	emit_signal("stats_changed", oxygen, health, hunger)
+	if health <= 0.0:
+		emit_signal("player_died")
+
+
 func _trigger_echolocation() -> void:
 	if is_echolocating:
 		return