Reorganize the codebase into role-based folders (snake_case)

Move the 40-odd root-level scripts and scenes into a tree that groups by role,
per the approved roadmap (WS2/WS3): actors/{player,matador,bear}, systems/{combat,
fx,input,debug,render,crowd,config}, ui/, props/ (was tscn_s/). Rename the shell
scene.tscn -> levels/game_shell.tscn and every PascalCase scene to snake_case
(Player.tscn -> player.tscn, MainMenu.tscn -> main_menu.tscn, etc.) so the
case-insensitive web/macOS filesystems can't alias two files together.

Done as a scripted move: each file travels with its .uid; every quoted res:// path
across scenes, scripts, .tres, and project.godot's 9 autoloads is rewritten; the
.godot uid/class cache is rebuilt from scratch. Scenes still resolve by uid, so the
rewrite is belt-and-suspenders. Lint globs (run_tests.sh + both CI workflows) now
walk the new dirs; an orphan animation_tree.gd.uid and 7 pre-existing trailing-
whitespace lints (barrel/torch, never covered by the old root-only glob) are cleaned.

Full suite green on both sides. Asset consolidation (Assets/Animations/fonts ->
art/) is deferred — moving imported .glb/.png/.ttf is safer done in the editor.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017KoYBYQgRyY1zDHXMsXY3V

systems/config/settings.gd

@@ -0,0 +1,117 @@
+extends Node
+## Player-facing game options (autoload `Settings`), persisted to user://settings.cfg.
+## Distinct from DP (debug tunables) and Controls (keybinds): this is the small set of
+## comfort/accessibility toggles the options menu exposes to the player.
+
+signal changed(key: String, value: Variant)
+
+const SAVE_PATH := "user://settings.cfg"
+const SECTION := "options"
+
+## Master screen-shake toggle — gates every camera_iso.trigger_hit (hits and ability FX).
+var screen_shake: bool = true
+## Gore toggle — when off, no blood spawns (impact spurt + ongoing spear-wound bleed).
+var gore: bool = true
+
+## Audio volumes stored as linear 0–1. Applied to AudioServer buses on load/change.
+var volume_master:  float = 1.0
+var volume_ambient: float = 1.0
+var volume_effects: float = 1.0
+var mute_all:       bool  = false
+
+
+func _ready() -> void:
+	_ensure_buses()
+	load_saved()
+
+
+## Ensure Ambient and Effects buses exist as children of Master.
+func _ensure_buses() -> void:
+	for bus_name: String in ["Ambient", "Effects"]:
+		if AudioServer.get_bus_index(bus_name) == -1:
+			AudioServer.add_bus()
+			var idx := AudioServer.bus_count - 1
+			AudioServer.set_bus_name(idx, bus_name)
+			AudioServer.set_bus_send(idx, &"Master")
+
+
+func _apply_audio() -> void:
+	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Master"),  _vol_db(volume_master))
+	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Ambient"), _vol_db(volume_ambient))
+	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Effects"), _vol_db(volume_effects))
+	AudioServer.set_bus_mute(AudioServer.get_bus_index("Master"), mute_all)
+
+
+func _vol_db(linear: float) -> float:
+	return linear_to_db(maxf(linear, 0.0001))
+
+
+func set_screen_shake(value: bool) -> void:
+	if screen_shake == value:
+		return
+	screen_shake = value
+	changed.emit("screen_shake", value)
+	save()
+
+
+func set_gore(value: bool) -> void:
+	if gore == value:
+		return
+	gore = value
+	changed.emit("gore", value)
+	save()
+
+
+func set_volume_master(value: float) -> void:
+	volume_master = clampf(value, 0.0, 1.0)
+	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Master"), _vol_db(volume_master))
+	changed.emit("volume_master", volume_master)
+	save()
+
+
+func set_volume_ambient(value: float) -> void:
+	volume_ambient = clampf(value, 0.0, 1.0)
+	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Ambient"), _vol_db(volume_ambient))
+	changed.emit("volume_ambient", volume_ambient)
+	save()
+
+
+func set_volume_effects(value: float) -> void:
+	volume_effects = clampf(value, 0.0, 1.0)
+	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Effects"), _vol_db(volume_effects))
+	changed.emit("volume_effects", volume_effects)
+	save()
+
+
+func set_mute_all(value: bool) -> void:
+	if mute_all == value:
+		return
+	mute_all = value
+	AudioServer.set_bus_mute(AudioServer.get_bus_index("Master"), mute_all)
+	changed.emit("mute_all", value)
+	save()
+
+
+func save() -> void:
+	var cfg := ConfigFile.new()
+	cfg.set_value(SECTION, "screen_shake",   screen_shake)
+	cfg.set_value(SECTION, "gore",           gore)
+	cfg.set_value(SECTION, "volume_master",  volume_master)
+	cfg.set_value(SECTION, "volume_ambient", volume_ambient)
+	cfg.set_value(SECTION, "volume_effects", volume_effects)
+	cfg.set_value(SECTION, "mute_all",       mute_all)
+	cfg.save(SAVE_PATH)
+
+
+func load_saved() -> void:
+	var cfg := ConfigFile.new()
+	if cfg.load(SAVE_PATH) != OK:
+		_apply_audio()
+		return
+	screen_shake   = cfg.get_value(SECTION, "screen_shake",   true)  as bool
+	gore           = cfg.get_value(SECTION, "gore",           true)  as bool
+	volume_master  = cfg.get_value(SECTION, "volume_master",  1.0)   as float
+	volume_ambient = cfg.get_value(SECTION, "volume_ambient", 1.0)   as float
+	volume_effects = cfg.get_value(SECTION, "volume_effects", 1.0)   as float
+	mute_all       = cfg.get_value(SECTION, "mute_all",       false) as bool
+	_apply_audio()