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/test/tests/test_npc_character.gd

@@ -0,0 +1,138 @@
+extends RefCounted
+## Headless tests for the character pass: layered outfits, hand items, idle
+## styles, queue slots, LOD tiers/labels, and the articulated rig structure.
+
+const NpcAvatar := preload("res://src/game/npc_avatar.gd")
+const NpcProfile := preload("res://src/core/npc_profile.gd")
+const Rules := preload("res://src/core/rules.gd")
+
+func _avatar(npc_type: int, seed_value: int) -> NpcAvatar:
+	var profile := NpcProfile.new()
+	profile.id = "char_test"
+	profile.npc_type = npc_type
+	profile.display_name = "Test Person"
+	var avatar := NpcAvatar.new()
+	avatar.setup(profile, "enter", seed_value,
+		Vector3(0, 0.5, 6), Vector3(0, 0.5, 1.5), Vector3(0, 0.5, 1.2), "char_test")
+	return avatar
+
+func test_outfit_layers_and_items_are_deterministic() -> bool:
+	var a: Dictionary = NpcAvatar.outfit_for(Rules.NpcType.TOURIST, 4242)
+	var b: Dictionary = NpcAvatar.outfit_for(Rules.NpcType.TOURIST, 4242)
+	return TestUtils.check(
+		a["layer"] == b["layer"] and a["hand_item"] == b["hand_item"]
+			and a["hair_style"] == b["hair_style"],
+		"outfit layers, hand item and hair style follow the seed")
+
+func test_layers_follow_roles() -> bool:
+	var a := TestUtils.check_eq(
+		NpcAvatar.layer_for(Rules.NpcType.RESPONDER, 1), "vest",
+		"responders wear a hi-vis vest")
+	var b := TestUtils.check_eq(
+		NpcAvatar.layer_for(Rules.NpcType.INFLUENCER, 1), "coat",
+		"influencers wear a coat")
+	var c := TestUtils.check_eq(
+		NpcAvatar.layer_for(Rules.NpcType.AUTHORIZED_STAFF, 1), "jacket",
+		"staff wear a jacket")
+	return a and b and c
+
+func test_hand_items_are_known_and_deterministic() -> bool:
+	var allowed := ["phone", "cup", "clipboard", "umbrella", "camera", "none"]
+	var ok := true
+	for seed_value in range(1, 30):
+		var item := NpcAvatar.hand_item_for(Rules.NpcType.TOURIST, seed_value * 31)
+		ok = ok and item in allowed
+		ok = ok and item == NpcAvatar.hand_item_for(
+			Rules.NpcType.TOURIST, seed_value * 31)
+	return TestUtils.check(ok, "hand items stay in the catalogue and are deterministic")
+
+func test_idle_styles_are_known() -> bool:
+	var allowed := ["phone", "crossed", "look", "clipboard", "breathe"]
+	var ok := true
+	for seed_value in range(1, 30):
+		var style := NpcAvatar.idle_style_for(Rules.NpcType.TOURIST, seed_value) \
+			if seed_value > 1 else NpcAvatar.idle_style_for(Rules.NpcType.INFLUENCER, 1)
+		ok = ok and style in allowed
+	return TestUtils.check(ok, "idle styles stay in the catalogue")
+
+func test_queue_slots_are_spaced_and_unique() -> bool:
+	var seen := {}
+	var ok := true
+	var previous := NpcAvatar.queue_slot_for(0)
+	for index in 6:
+		var slot := NpcAvatar.queue_slot_for(index)
+		ok = ok and not seen.has(slot)
+		seen[slot] = true
+		if index > 0:
+			ok = ok and slot.distance_to(previous) > 0.3
+		previous = slot
+	return TestUtils.check(ok and NpcAvatar.queue_slot_for(0) == Vector3.ZERO,
+		"queue slots are unique, spaced, and start at the door")
+
+func test_lod_tiers_use_hysteresis() -> bool:
+	var avatar := NpcAvatar.new()
+	avatar._lod_tier = 0
+	var a := TestUtils.check_eq(avatar._lod_tier_for(5.0), 0, "near stays full detail")
+	var b := TestUtils.check_eq(avatar._lod_tier_for(16.0), 1,
+		"past the hysteresis band switches to simplified")
+	avatar._lod_tier = 1
+	var c := TestUtils.check_eq(avatar._lod_tier_for(13.0), 1,
+		"hysteresis keeps the simplified tier just inside the edge")
+	var d := TestUtils.check_eq(avatar._lod_tier_for(12.0), 0,
+		"clearing the hysteresis band returns to full detail")
+	avatar._lod_tier = 1
+	var e := TestUtils.check_eq(avatar._lod_tier_for(30.0), 2, "far uses the impostor")
+	avatar.free()
+	return a and b and c and d and e
+
+func test_reaction_labels_match_state() -> bool:
+	var a := TestUtils.check_eq(NpcAvatar.reaction_label("flee", 0), "!!", "panic label")
+	var b := TestUtils.check_eq(NpcAvatar.reaction_label("watch", 0), "?!", "watching label")
+	var c := TestUtils.check_eq(NpcAvatar.reaction_label("", 3), "!", "blocked label")
+	var d := TestUtils.check_eq(NpcAvatar.reaction_label("", 0), "", "calm has no label")
+	return a and b and c and d
+
+func test_walk_to_idle_animation_transition() -> bool:
+	var avatar := _avatar(Rules.NpcType.TOURIST, 21)
+	var hip := avatar.find_child("HipL", true, false) as Node3D
+	var a := TestUtils.check(hip != null, "rig has a hip pivot")
+	avatar.velocity = Vector3(0, 0, 1.2)
+	avatar._animate(0.016)
+	var walking := absf(hip.rotation.x) > 0.01
+	var b := TestUtils.check(walking, "walking swings the hip")
+	avatar.velocity = Vector3.ZERO
+	for i in 90:
+		avatar._animate(0.016)
+	var c := TestUtils.check(absf(hip.rotation.x) < 0.05,
+		"stopping settles the hip back to the idle pose (%.3f)" % hip.rotation.x)
+	avatar.free()
+	return a and b and c
+
+func test_rig_is_articulated() -> bool:
+	var avatar := _avatar(Rules.NpcType.TOURIST, 77)
+	var a := TestUtils.check(avatar.find_child("HipL", true, false) != null
+		and avatar.find_child("Knee", true, false) != null,
+		"legs have hip and knee pivots")
+	var b := TestUtils.check(avatar.find_child("ShoulderR", true, false) != null
+		and avatar.find_child("Elbow", true, false) != null
+		and avatar.find_child("Hand", true, false) != null,
+		"arms have shoulder, elbow and hand pivots")
+	var c := TestUtils.check(avatar.get_node_or_null("Rig/Head") != null,
+		"the focus code can still find Rig/Head")
+	avatar.free()
+	return a and b and c
+
+func test_avatar_mesh_budget_and_lod_swap() -> bool:
+	var avatar := _avatar(Rules.NpcType.TOURIST, 12)
+	var meshes := avatar.find_children("*", "MeshInstance3D", true, false)
+	var a := TestUtils.check(meshes.size() <= 40,
+		"avatar stays inside the mesh budget (%d)" % meshes.size())
+	avatar.apply_lod(2)
+	var impostor := avatar.get_node_or_null("Impostor") as Node3D
+	var rig := avatar.get_node_or_null("Rig") as Node3D
+	var b := TestUtils.check(impostor != null and impostor.visible, "far LOD shows the impostor")
+	var c := TestUtils.check(rig != null and not rig.visible, "far LOD hides the full rig")
+	avatar.apply_lod(0)
+	var d := TestUtils.check(rig.visible and not impostor.visible, "near LOD restores the rig")
+	avatar.free()
+	return a and b and c and d