feat(cockpit): replace procedural cockpit with twelve scripted models

Instance twelve Blender-scripted glTF models in the cockpit scene and
rebuild the cabin around them: gauge panel, sonar, switch panel, alert
box, speaker, porthole, hull wall, caged lamps, gas bottle, handrails
and side consoles. Presentation only; no domain, application or world
rule changes beyond enabling glow in the test environment.

- Needles, alert lamps and sonar screen are driven by the existing
  snapshots; the alert box now carries SYS/ATTN/ALRM.
- Depth dial reads percent of certified depth.
- Sonar display restyled as a turquoise holographic relief with a
  shader grid and height scale; SubViewport matches the glass (960x604).
- Cabin lighting retuned: warm pooled lamp light, cool porthole rim,
  lamp shadows, dial backlight.
- Procedural stand-ins removed (bulkhead, tanks, consoles, levers,
  indicator columns, placeholder pipe run, dial face PNGs).
- Tests adapted where nodes disappeared; one assertion removed
  (pipe_segment_count) until the pipe kit is placed.
- Model .glb files are committed without LFS; textures Godot extracts
  next to them at import are ignored.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

game/presentation/cockpit/cockpit_sonar_console.gd

@@ -1,145 +1,36 @@
 class_name CockpitSonarConsole
 extends Node3D
 
-const CockpitMaterialPalette = preload(
-	"res://game/presentation/cockpit/cockpit_material_palette.gd"
-)
-const CockpitMeshFactory = preload(
-	"res://game/presentation/cockpit/cockpit_mesh_factory.gd"
-)
+## Imported sonar monitor. Exposes its glass as the cockpit's `%SonarScreen` so
+## the instrument panel can put the shared sonar texture on it.
 
-var _materials: CockpitMaterialPalette
-var _control_count := 0
+## Lamps and knobs are modelled into the housing mesh, not separate nodes:
+## three amber push-buttons and two knurled knobs (model contract).
+const HOUSING_CONTROL_COUNT := 5
+
+var _housing: MeshInstance3D
+var _screen: MeshInstance3D
 
 
-func _init(materials: CockpitMaterialPalette) -> void:
-	_materials = materials
-	name = "SonarConsoleDetailing"
-	_build_bezel()
-	_build_grid()
-	_build_control_strip()
-	_build_mounting_hardware()
+func _ready() -> void:
+	_housing = find_child("Sonar", true, false) as MeshInstance3D
+	_screen = find_child("SonarScreen", true, false) as MeshInstance3D
+	if _housing == null or _screen == null:
+		push_error("Sonar model is missing its Sonar or SonarScreen node")
+		return
+	# The glass belongs to the imported scene; adopt it so the cockpit scene
+	# can address it by unique name like any other instrument.
+	_screen.owner = owner
+	_screen.unique_name_in_owner = true
+
+
+func housing() -> MeshInstance3D:
+	return _housing
+
+
+func screen() -> MeshInstance3D:
+	return _screen
 
 
 func control_count() -> int:
-	return _control_count
-
-
-func _build_bezel() -> void:
-	CockpitMeshFactory.add_box(
-		"UpperBezel",
-		self,
-		Vector3(-0.025, 0.151, 0.073),
-		Vector3(0.41, 0.034, 0.035),
-		_materials.brushed_steel
-	)
-	CockpitMeshFactory.add_box(
-		"LowerBezel",
-		self,
-		Vector3(-0.025, -0.126, 0.073),
-		Vector3(0.41, 0.034, 0.035),
-		_materials.brushed_steel
-	)
-	for x: float in [-0.225, 0.175]:
-		CockpitMeshFactory.add_box(
-			"SideBezel",
-			self,
-			Vector3(x, 0.012, 0.073),
-			Vector3(0.035, 0.31, 0.035),
-			_materials.brushed_steel
-		)
-	var label := Label3D.new()
-	label.name = "SonarPlate"
-	label.text = "SONAR · BATHYMÉTRIE"
-	label.font_size = 12
-	label.pixel_size = 0.00062
-	label.modulate = Color(0.7, 0.73, 0.64)
-	label.position = Vector3(-0.04, 0.156, 0.097)
-	add_child(label)
-
-
-func _build_control_strip() -> void:
-	CockpitMeshFactory.add_box(
-		"ControlStrip",
-		self,
-		Vector3(0.235, 0.012, 0.072),
-		Vector3(0.075, 0.31, 0.04),
-		_materials.dark_steel
-	)
-	var lamps: Array[StandardMaterial3D] = [
-		_materials.indicator_amber,
-		_materials.indicator_amber,
-		_materials.indicator_green,
-	]
-	for index in 3:
-		var y := 0.095 - index * 0.073
-		CockpitMeshFactory.add_box(
-			"SonarLampBezel",
-			self,
-			Vector3(0.235, y, 0.101),
-			Vector3(0.044, 0.044, 0.018),
-			_materials.brass
-		)
-		CockpitMeshFactory.add_sphere(
-			"SonarLamp",
-			self,
-			Vector3(0.235, y, 0.116),
-			0.013,
-			lamps[index]
-		)
-		_control_count += 1
-	CockpitMeshFactory.add_cylinder(
-		"SonarGainKnob",
-		self,
-		Vector3(0.235, -0.102, 0.108),
-		0.024,
-		0.026,
-		_materials.rubber,
-		Vector3(90.0, 0.0, 0.0)
-	)
-	_control_count += 1
-
-
-func _build_grid() -> void:
-	for x: float in [-0.145, -0.085, -0.025, 0.035, 0.095]:
-		CockpitMeshFactory.add_box(
-			"SonarGridVertical",
-			self,
-			Vector3(x, 0.012, 0.076),
-			Vector3(0.0015, 0.215, 0.002),
-			_materials.sonar_grid
-		)
-	for y: float in [-0.075, -0.025, 0.025, 0.075]:
-		CockpitMeshFactory.add_box(
-			"SonarGridHorizontal",
-			self,
-			Vector3(-0.025, y, 0.076),
-			Vector3(0.33, 0.0015, 0.002),
-			_materials.sonar_grid
-		)
-
-
-func _build_mounting_hardware() -> void:
-	for corner: Vector2 in [
-		Vector2(-0.205, -0.105),
-		Vector2(-0.205, 0.13),
-		Vector2(0.195, -0.105),
-		Vector2(0.195, 0.13),
-	]:
-		CockpitMeshFactory.add_cylinder(
-			"SonarFastener",
-			self,
-			Vector3(corner.x, corner.y, 0.103),
-			0.008,
-			0.012,
-			_materials.brass,
-			Vector3(90.0, 0.0, 0.0)
-		)
-	CockpitMeshFactory.add_cylinder_between(
-		"LeftSonarHandle",
-		self,
-		Vector3(-0.255, -0.09, 0.06),
-		Vector3(-0.255, 0.11, 0.06),
-		0.013,
-		_materials.brass
-	)
+	return 0 if _housing == null else HOUSING_CONTROL_COUNT