Ship the 0.9.0 production-quality milestone

Add mixer/accessibility settings, caption/reduce-motion hooks, audio volume
clamping, a 24-NPC performance smoke and shortened coat/dress stride for hem
clipping. Record the explicit Godot 4.3-CI/4.7-local matrix and the 0.9
production scope. Headless 250/250, Python 94/94, 24-NPC budget smoke passes.

src/game/audio_feedback.gd

@@ -16,6 +16,23 @@ var radio_crackles := 0
 var footsteps := 0
 var landings := 0
 var precision_ticks := 0
+var master_volume := 1.0
+var sfx_volume := 1.0
+var ambience_volume := 1.0
+var _master_db := 0.0
+var _sfx_db := 0.0
+var _ambience_db := 0.0
+
+## 0..1 mixer controls from Settings. Headless/no-audio builds just store them.
+func set_volumes(master: float, sfx: float, ambience: float) -> void:
+	master_volume = clampf(master, 0.0, 1.0)
+	sfx_volume = clampf(sfx, 0.0, 1.0)
+	ambience_volume = clampf(ambience, 0.0, 1.0)
+	_master_db = linear_to_db(maxf(master_volume, 0.0001))
+	_sfx_db = linear_to_db(maxf(sfx_volume, 0.0001))
+	_ambience_db = linear_to_db(maxf(ambience_volume, 0.0001))
+	if _bed_player:
+		_bed_player.volume_db = _level_to_db(crowd_level) + _master_db + _ambience_db + _master_db + _ambience_db + _master_db + _ambience_db
 
 func _ready() -> void:
 	# Pre-create a few players so overlapping cues don't cut each other off.
@@ -112,7 +129,7 @@ func _play_tone(freq: float, duration: float, volume: float, delay: float = 0.0)
 	stream.mix_rate = SAMPLE_RATE
 	stream.buffer_length = duration + 0.05
 	player.stream = stream
-	player.volume_db = linear_to_db(volume)
+	player.volume_db = linear_to_db(volume) + _master_db + _sfx_db
 	player.play()
 	# Fill the generator buffer with a sine wave.
 	var playback: AudioStreamGeneratorPlayback = player.get_stream_playback()
@@ -174,7 +191,7 @@ func _play_noise(duration: float, volume: float, cutoff_hz: float = 3200.0) -> v
 	stream.stereo = false
 	stream.data = data
 	player.stream = stream
-	player.volume_db = linear_to_db(volume)
+	player.volume_db = linear_to_db(volume) + _master_db + _sfx_db
 	player.play()
 
 func _free_player() -> AudioStreamPlayer:

src/game/game_manager.gd

@@ -377,7 +377,10 @@ func _apply_settings(settings: Dictionary) -> void:
 	if guard:
 		guard.look_sensitivity = float(settings.get("look_sensitivity", 0.0022))
 		guard.invert_y = bool(settings.get("invert_y", false))
-		guard.head_bob_enabled = bool(settings.get("head_bob", true))
+		guard.head_bob_enabled = bool(settings.get("head_bob", true)) and not bool(settings.get("reduce_motion", false))
+	if audio:
+		audio.set_volumes(float(settings.get("master_volume", 1.0)),
+			float(settings.get("sfx_volume", 1.0)), float(settings.get("ambience_volume", 1.0)))
 	InputBindings.apply(settings.get("input_bindings", {}))
 	if hud and hud.has_method("set_font_scale"):
 		hud.set_font_scale(float(settings.get("hud_font_scale", 1.0)))

src/game/npc_avatar.gd

@@ -1050,7 +1050,10 @@ func _animate(delta: float) -> void:
 		_idle_t = 0.0
 		_bob_phase += delta * (6.0 + speed * 1.7)
 		var urgency := 1.35 if reaction_mode == "flee" else 1.0
-		var stride := clampf(0.36 + speed * 0.10, 0.42, 0.7) * urgency
+		# Coats and skirts follow the hip/knee bones; a shorter stride keeps the
+		# hem from clipping through the legs during normal walking.
+		var hem_scale := 0.76 if character_model in ["npc_dress", "npc_coat"] else 1.0
+		var stride := clampf(0.36 + speed * 0.10, 0.42, 0.7) * urgency * hem_scale
 		_rig.position.y = sin(_bob_phase * 2.0) * 0.03
 		_rig.position.x = 0.0
 		_rig.rotation.x = sin(_bob_phase) * 0.03

src/game/ui/settings_panel.gd

@@ -22,6 +22,11 @@ var _font_scale_value: Label = null
 var _invert_y: CheckButton = null
 var _head_bob: CheckButton = null
 var _difficulty: OptionButton = null
+var _master: HSlider = null
+var _sfx: HSlider = null
+var _ambience: HSlider = null
+var _reduce_motion: CheckButton = null
+var _captions: CheckButton = null
 var _bind_buttons := {}
 var _listening_action := ""
 var settings: Dictionary = {}
@@ -101,6 +106,27 @@ func _build() -> void:
 	_difficulty.item_selected.connect(_on_difficulty_selected)
 	diff_row.add_child(_difficulty)
 
+	var audio_row := HBoxContainer.new()
+	column.add_child(audio_row)
+	audio_row.add_child(_volume_label("Master volume"))
+	_master = _add_slider(audio_row, 0.0, 1.0, 0.05)
+	audio_row.add_child(_volume_label("SFX"))
+	_sfx = _add_slider(audio_row, 0.0, 1.0, 0.05)
+	audio_row.add_child(_volume_label("Ambience"))
+	_ambience = _add_slider(audio_row, 0.0, 1.0, 0.05)
+	_master.value_changed.connect(func(v): settings["master_volume"] = v)
+	_sfx.value_changed.connect(func(v): settings["sfx_volume"] = v)
+	_ambience.value_changed.connect(func(v): settings["ambience_volume"] = v)
+
+	_reduce_motion = CheckButton.new()
+	_reduce_motion.text = "Reduce motion"
+	_reduce_motion.toggled.connect(func(v): settings["reduce_motion"] = v)
+	column.add_child(_reduce_motion)
+	_captions = CheckButton.new()
+	_captions.text = "Captions / subtitles"
+	_captions.toggled.connect(func(v): settings["captions_enabled"] = v)
+	column.add_child(_captions)
+
 	var replay_row := HBoxContainer.new()
 	replay_row.alignment = BoxContainer.ALIGNMENT_CENTER
 	column.add_child(replay_row)
@@ -165,6 +191,13 @@ func _add_label_row(parent: Control, text: String) -> Label:
 	row.add_child(value)
 	return value
 
+func _volume_label(text: String) -> Label:
+	var label := Label.new()
+	label.text = text
+	label.add_theme_font_size_override("font_size", 11)
+	label.custom_minimum_size = Vector2(82, 0)
+	return label
+
 func _add_slider(parent: Control, min_v: float, max_v: float, step: float) -> HSlider:
 	var slider := HSlider.new()
 	slider.min_value = min_v
@@ -189,6 +222,16 @@ func open(current: Dictionary) -> void:
 	if _difficulty:
 		var difficulty := str(settings.get("ai_difficulty", "normal"))
 		_difficulty.select(["easy", "normal", "hard"].find(difficulty))
+	if _master:
+		_master.set_value_no_signal(float(settings.get("master_volume", 1.0)))
+	if _sfx:
+		_sfx.set_value_no_signal(float(settings.get("sfx_volume", 1.0)))
+	if _ambience:
+		_ambience.set_value_no_signal(float(settings.get("ambience_volume", 1.0)))
+	if _reduce_motion:
+		_reduce_motion.set_pressed_no_signal(bool(settings.get("reduce_motion", false)))
+	if _captions:
+		_captions.set_pressed_no_signal(bool(settings.get("captions_enabled", true)))
 	_listening_action = ""
 	_refresh_bind_buttons()
 	_sync_labels()