rnd(M02): extract character presenters

Work-Package: M02-RND-CHARACTER-PRESENTATION-001

Agent: sindo-main-codex

Tests: presentation/input/movement/terrain/camera regressions; coordinate/streaming/docs/coordination gates; renderer dry-run 7/7

Fidelity: preserves current sandbox model/outfit and Stand/Idle/Run/Walk behavior; build-12340 parity remains unverified

src/scenes/character/character_animation_presenter.gd

@@ -0,0 +1,95 @@
+class_name CharacterAnimationPresenter
+extends Node
+
+## Selects and plays the current sandbox idle or moving animation.
+## Animation import, movement simulation and model composition remain external.
+
+const MOVING_ANIMATION_CANDIDATES: Array[String] = ["Run", "Walk"]
+const STATIONARY_ANIMATION_CANDIDATES: Array[String] = ["Stand", "Idle"]
+
+## Cross-fade time retained from the current sandbox controller.
+@export var animation_blend_time_seconds: float = 0.15
+
+var active_animation_name: String:
+	get:
+		return _active_animation_name
+
+var has_animation_player: bool:
+	get:
+		return _animation_player != null and is_instance_valid(_animation_player)
+
+var _animation_player: AnimationPlayer
+var _active_animation_name := ""
+
+
+## Finds the first AnimationPlayer below a newly composed character root.
+## Binding null or a root without animations clears the current presentation.
+func bind_character_root(character_root: Node) -> bool:
+	_animation_player = (
+		_find_animation_player(character_root)
+		if character_root != null and is_instance_valid(character_root)
+		else null
+	)
+	_active_animation_name = ""
+	if _animation_player == null:
+		return false
+	_prepare_animation_player(_animation_player)
+	present_locomotion(false)
+	return true
+
+
+## Presents the current moving/stationary locomotion state.
+## Returns true only when a different animation starts playing.
+func present_locomotion(is_moving: bool) -> bool:
+	if _animation_player == null or not is_instance_valid(_animation_player):
+		_animation_player = null
+		_active_animation_name = ""
+		return false
+	var candidates := MOVING_ANIMATION_CANDIDATES if is_moving else STATIONARY_ANIMATION_CANDIDATES
+	var selected_animation := _choose_animation(candidates)
+	if selected_animation.is_empty() or selected_animation == _active_animation_name:
+		return false
+	_active_animation_name = selected_animation
+	_animation_player.play(selected_animation, animation_blend_time_seconds)
+	return true
+
+
+func _prepare_animation_player(animation_player: AnimationPlayer) -> void:
+	animation_player.playback_default_blend_time = animation_blend_time_seconds
+	for animation_name in animation_player.get_animation_list():
+		var lowercase_name := String(animation_name).to_lower()
+		if (
+			lowercase_name == "stand"
+			or lowercase_name == "idle"
+			or lowercase_name == "run"
+			or lowercase_name == "walk"
+			or lowercase_name.contains("stand")
+			or lowercase_name.contains("run")
+			or lowercase_name.contains("walk")
+		):
+			var animation := animation_player.get_animation(animation_name)
+			if animation != null:
+				animation.loop_mode = Animation.LOOP_LINEAR
+
+
+func _choose_animation(candidates: Array[String]) -> String:
+	for candidate in candidates:
+		if _animation_player.has_animation(candidate):
+			return candidate
+	var animation_names := _animation_player.get_animation_list()
+	for candidate in candidates:
+		var lowercase_candidate := candidate.to_lower()
+		for animation_name in animation_names:
+			if String(animation_name).to_lower().contains(lowercase_candidate):
+				return String(animation_name)
+	return ""
+
+
+func _find_animation_player(root: Node) -> AnimationPlayer:
+	if root is AnimationPlayer:
+		return root
+	for child in root.get_children():
+		var animation_player := _find_animation_player(child)
+		if animation_player != null:
+			return animation_player
+	return null