fix: animation debug + F1 third-person camera

SkinnedPlayerModel:
- Added _print_tree debug to see GLB scene structure at runtime
- Auto-play Idle animation on load
- Added periodic debug output for animation state
- Only change animation when target differs from current

Third-person camera:
- F1 toggles between FPS and third-person view
- Third-person camera positioned behind/above player
- Smooth follow with lerp
- Camera tracks player position each frame

debug/test_level_builder.gd

@@ -17,7 +17,9 @@ var _fps_label: Label
 var _standalone_speed_label: Label
 var _player: CharacterBody3D
 var _debug_ui_panel: PanelContainer
-
+var _third_person: bool = false
+var _third_person_camera: Camera3D
+var _fps_camera: Camera3D
 
 func _ready() -> void:
 	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
@@ -45,6 +47,61 @@ func _ready() -> void:
 				p.queue_free()
 		)
 
+func _unhandled_input(event: InputEvent) -> void:
+	if event is InputEventKey and event.pressed and not event.echo:
+		if event.keycode == KEY_F1:
+			_toggle_third_person()
+
+func _toggle_third_person() -> void:
+	_third_person = not _third_person
+	
+	# Find cameras
+	if not _fps_camera:
+		_fps_camera = _find_camera_in_player()
+	if not _third_person_camera:
+		_setup_third_person_camera()
+	
+	if _third_person:
+		# Switch to third person
+		if _fps_camera:
+			_fps_camera.current = false
+		if _third_person_camera:
+			_third_person_camera.current = true
+		print("Third person: ON")
+	else:
+		# Switch to first person
+		if _third_person_camera:
+			_third_person_camera.current = false
+		if _fps_camera:
+			_fps_camera.current = true
+		print("Third person: OFF")
+
+func _find_camera_in_player() -> Camera3D:
+	if not _player:
+		return null
+	# Search for Camera3D in player's children
+	for child in _player.get_children():
+		if child is Camera3D:
+			return child
+		for grandchild in child.get_children():
+			if grandchild is Camera3D:
+				return grandchild
+	return null
+
+func _setup_third_person_camera() -> void:
+	if not _player:
+		return
+	_third_person_camera = Camera3D.new()
+	_third_person_camera.name = "ThirdPersonCamera"
+	_third_person_camera.fov = 75.0
+	_third_person_camera.near = 0.1
+	_third_person_camera.far = 200.0
+	# Position behind and above the player
+	_third_person_camera.position = Vector3(0, 2.0, -4.0)
+	_third_person_camera.look_at(Vector3(0, 1.0, 0))
+	_player.add_child(_third_person_camera)
+	_third_person_camera.current = false
+
 
 func _build_materials() -> void:
 	pass
@@ -690,6 +747,12 @@ func _process(_delta: float) -> void:
 	if not _player or not is_instance_valid(_player):
 		return
 
+	# Third person camera follow
+	if _third_person and _third_person_camera and _third_person_camera.current:
+		var target_pos = _player.global_position + Vector3(0, 2.0, -4.0)
+		_third_person_camera.global_position = _third_person_camera.global_position.lerp(target_pos, 0.1)
+		_third_person_camera.look_at(_player.global_position + Vector3(0, 1.0, 0))
+
 	if _debug_ui_panel:
 		_debug_ui_panel.visible = SettingsManager.show_debug_ui