Character and movement pass

NPC characters
- Articulated rig (hips/knees, shoulders/elbows/hands) replaces rigid capsules;
  the walk cycle bends knees and elbows and flees with a longer stride.
- Layered outfits (jacket/vest/coat/dress), extended accessories and hand items
  (bag, umbrella, phone, camera, clipboard, cup), face details and five hair
  silhouettes, all deterministic per profile seed.
- Idle behaviour layers (phone, clipboard, crossed arms, look-around), breathing
  and weight shift; escalation raises hands or points, and noticed NPCs turn
  toward the guard.
- Reaction symbols above the head (!!, ?!, !, ?), door-queue offsets assigned by
  GameManager, three LOD tiers with hysteresis and a billboard impostor.
- smoke_npc_budget.gd: 16 avatars = 534 meshes, ~6.9 ms average (50 ms budget).

Player movement
- Separate accel/decel, step-up assist for kerbs and the entrance steps, and a
  forward-axis fix: W was inverted (get_axis(forward, back) is negative).
- Head bob, landing dip and precision-walk FOV, gated by persisted head-bob and
  invert-Y settings; precision chip and tick; surface-aware footsteps and a
  landing cue forwarded to AudioFeedback.
- Gamepad support (sticks, deadzone, face buttons, bumpers), a control legend
  that follows the active device, and named actions for the remaining keys.
- Key/button remapping in Settings, persisted as input_bindings and applied by
  InputBindings (mouse and gamepad axes are never removed).
- smoke_movement.gd (windowed): climbs the steps, checks precision speed, chip,
  footsteps and landing; new 11-precision-walk capture and catalogue entry.

Verification: headless 208/208, Python tooling 56/56, all 11 smokes pass,
compare 11 good / 0 bad, movement judge match. Version 0.5.0. Only optional
Future ideas remain in TODO.

src/game/ui/settings_panel.gd

@@ -6,6 +6,8 @@ extends CanvasLayer
 ## Emits `applied(settings)` so the game manager can push values into the guard
 ## and HUD as soon as the player confirms.
 
+const InputBindings := preload("res://src/core/input_bindings.gd")
+
 signal applied(settings: Dictionary)
 signal closed()
 
@@ -14,6 +16,10 @@ var _sensitivity: HSlider = null
 var _font_scale: HSlider = null
 var _sensitivity_value: Label = null
 var _font_scale_value: Label = null
+var _invert_y: CheckButton = null
+var _head_bob: CheckButton = null
+var _bind_buttons := {}
+var _listening_action := ""
 var settings: Dictionary = {}
 
 func _ready() -> void:
@@ -66,6 +72,37 @@ func _build() -> void:
 	_font_scale = _add_slider(font_row, 0.75, 1.75, 0.05)
 	_font_scale.value_changed.connect(_on_font_scale_changed)
 
+	_invert_y = CheckButton.new()
+	_invert_y.text = "Invert vertical look"
+	_invert_y.toggled.connect(_on_invert_y_toggled)
+	column.add_child(_invert_y)
+
+	_head_bob = CheckButton.new()
+	_head_bob.text = "Head bob and camera motion"
+	_head_bob.toggled.connect(_on_head_bob_toggled)
+	column.add_child(_head_bob)
+
+	var controls_title := Label.new()
+	controls_title.text = "Controls (click a binding, then press a key or pad button)"
+	controls_title.add_theme_font_size_override("font_size", 13)
+	controls_title.modulate = Color(0.75, 0.8, 0.9)
+	column.add_child(controls_title)
+	var grid := GridContainer.new()
+	grid.columns = 4
+	grid.add_theme_constant_override("h_separation", 10)
+	grid.add_theme_constant_override("v_separation", 6)
+	column.add_child(grid)
+	for action in InputBindings.REMAPPABLE:
+		var label := Label.new()
+		label.text = str(action).replace("_", " ").capitalize()
+		label.size_flags_horizontal = Control.SIZE_EXPAND_FILL
+		grid.add_child(label)
+		var button := Button.new()
+		button.custom_minimum_size = Vector2(130, 0)
+		button.pressed.connect(_on_rebind.bind(action))
+		grid.add_child(button)
+		_bind_buttons[action] = button
+
 	var row := HBoxContainer.new()
 	row.alignment = BoxContainer.ALIGNMENT_CENTER
 	row.add_theme_constant_override("separation", 12)
@@ -112,6 +149,12 @@ func open(current: Dictionary) -> void:
 		_sensitivity.set_value_no_signal(clampf(sens, _sensitivity.min_value, _sensitivity.max_value))
 	if _font_scale:
 		_font_scale.set_value_no_signal(clampf(scale, _font_scale.min_value, _font_scale.max_value))
+	if _invert_y:
+		_invert_y.set_pressed_no_signal(bool(settings.get("invert_y", false)))
+	if _head_bob:
+		_head_bob.set_pressed_no_signal(bool(settings.get("head_bob", true)))
+	_listening_action = ""
+	_refresh_bind_buttons()
 	_sync_labels()
 	visible = true
 	_root.visible = true
@@ -135,6 +178,42 @@ func _on_font_scale_changed(value: float) -> void:
 	settings["hud_font_scale"] = value
 	_sync_labels()
 
+func _on_invert_y_toggled(pressed: bool) -> void:
+	settings["invert_y"] = pressed
+
+func _on_head_bob_toggled(pressed: bool) -> void:
+	settings["head_bob"] = pressed
+
+func _refresh_bind_buttons() -> void:
+	var remaps: Dictionary = settings.get("input_bindings", {})
+	for action in _bind_buttons.keys():
+		var button: Button = _bind_buttons[action]
+		var descriptor: Dictionary = remaps.get(action, {})
+		if descriptor.is_empty():
+			descriptor = InputBindings.current_descriptor(action)
+		button.text = InputBindings.label_for(descriptor)
+
+func _on_rebind(action: String) -> void:
+	_listening_action = action
+	var button: Button = _bind_buttons.get(action)
+	if button:
+		button.text = "Press…"
+		if button.is_inside_tree():
+			button.grab_focus()
+
+func _apply_remap(event: InputEvent) -> bool:
+	if _listening_action == "":
+		return false
+	var descriptor := InputBindings.descriptor_from_event(event)
+	if descriptor.is_empty():
+		return false
+	var remaps: Dictionary = settings.get("input_bindings", {})
+	remaps[_listening_action] = descriptor
+	settings["input_bindings"] = remaps
+	_listening_action = ""
+	_refresh_bind_buttons()
+	return true
+
 func _on_apply() -> void:
 	if Save:
 		Save.save_settings(settings)
@@ -149,6 +228,12 @@ func _on_cancel() -> void:
 func _unhandled_input(event: InputEvent) -> void:
 	if not visible:
 		return
+	if _listening_action != "":
+		var pressed: bool = (event is InputEventKey and event.pressed and not event.echo) \
+			or (event is InputEventJoypadButton and event.pressed)
+		if pressed and _apply_remap(event):
+			get_viewport().set_input_as_handled()
+			return
 	if event is InputEventKey and event.pressed and not event.echo and event.keycode == KEY_ESCAPE:
 		_on_cancel()
 		get_viewport().set_input_as_handled()