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/assets/README.md

@@ -1,37 +1,54 @@
-# Cockpit texture provenance
+# Cockpit asset provenance
 
-These textures were generated specifically for Ransom's Wake on 3 October 2026
+## Textures
+
+The texture below was generated specifically for Ransom's Wake on 3 October 2026
 with OpenAI's built-in image generation tool. No third-party image was used as
 an input or reference.
 
-## `naval_painted_steel_albedo.png`
+### `naval_painted_steel_albedo.png`
 
 Prompt summary: seamless, orthographic PBR-style albedo of dark blue-green
 naval painted steel, with restrained salt-air oxidation, micro-scratches,
 paint chips and grime; neutral illumination; no borders, rivets, text or
 watermark.
 
-## `analog_gauge_face_albedo.png`
+The source output was resized to 1024 × 1024 and stripped of metadata for
+runtime use. The original generated output remains in the local Codex image
+generation store and is not required by the game.
 
-Prompt summary: orthographic vintage naval gauge face in aged ivory enamel,
-with fine crazing, soot, speckling and a faint printed arc; no bezel, needle,
-hub, glass, text, numbers, logo or watermark.
+The generated gauge faces (`analog_gauge_face_albedo.png` and the four
+`*_gauge_face_albedo_v2.png`) were removed on 6 October 2026: the dials are now
+printed on the gauge panel model below.
 
-Both source outputs were resized to 1024 × 1024 and stripped of metadata for
-runtime use. The original generated outputs remain in the local Codex image
-generation store and are not required by the game.
+## Models
 
-## Dedicated instrument faces
+`models/gauge_panel.glb`, `models/sonar.glb`, `models/switch_panel.glb`,
+`models/alert_box.glb`, `models/speaker.glb`, `models/porthole.glb`,
+`models/hull_wall.glb`, `models/cage_lamp.glb`, `models/gas_bottle.glb`,
+`models/handrail_l.glb`, `models/handrail_r.glb` and `models/side_console.glb`
+were produced for Ransom's Wake
+by Blender scripts written for the project, from concept sheets generated for
+the project. No third-party mesh, texture or scan was used. Their textures
+(base colour, ORM, normal and, where relevant, emission) are embedded in the
+`.glb` files: 2048² for the gauge panel, sonar and switch panel, a 4096 × 1024
+strip for the four printed dials, 2048² for the porthole and hull wall, 1024²
+for the other props.
 
-`oxygen_gauge_face_albedo_v2.png`, `battery_gauge_face_albedo_v2.png`,
-`hull_gauge_face_albedo_v2.png` and `depth_gauge_face_albedo_v2.png` were
-generated on 4 October 2026 with the same built-in tool. The approved cockpit
-target and then the oxygen face were used only as project-owned style
-references.
+Dial and label lettering is rendered into the textures with Arial and Impact,
+which are Windows system fonts. **Their licence must be checked before the game
+is distributed.**
 
-Prompt summary: orthographic mechanical submarine gauges in aged ivory enamel,
-with exact French labels and units, dense numerical scales, restrained patina,
-and green, amber and red operating sectors. The generated needles, bezels and
-glass were explicitly excluded because those parts are modeled and animated in
-Godot. The source outputs were resized to 1024 × 1024 and given a circular alpha
-mask for flat, distortion-free mounting inside the physical bezels.
+The Blender sources are not in this repository. A model is changed by editing
+its generating script and re-exporting, never by editing the import in Godot.
+The cockpit scene references the `.glb` files directly, so a replaced file
+updates the cockpit without touching the scene.
+
+With Godot's default import settings the embedded textures are extracted as
+`models/<model>_<texture>.png` next to each `.glb`. Those PNG files are import
+by-products, regenerated from the `.glb`, and are not sources.
+
+As of 6 October 2026 the `.glb` files are deliberately **not committed**
+(their textures are still being balanced, and the repository uses plain Git
+without LFS). Until they are, `cockpit_interior.tscn` only loads on a machine
+that has them in `models/`.