feat(repair): expose case part anchors and fix lid node name

- Fix REPAIR_CASE_LID_NODE_NAME from "partiesup" to "partsup" (the actual
  node name in packderelance.gltf), restoring the lid open/close animation
  that was silently no-oping since introduction.
- Add REPAIR_CASE_PART_ANCHOR_NAMES (cabledroit, cablegauche, pucehaut,
  pucebas, refroidisseur) and REPAIR_CASE_PART_ANCHOR_FALLBACKS for
  case-local positions used when the GLTF lacks a node (refroidisseur).
- RepairCaseModel now resolves these anchor nodes on mount, hides existing
  meshes underneath them, and creates lightweight Object3D placeholders for
  missing names so the anchoring pipeline is uniform.
- Each frame, anchor world positions are converted to step-local space and
  emitted via the new onAnchorsChange callback (debounced via signature like
  placeholders). Consumers added in subsequent commits.

src/data/gameplay/repairCaseConfig.ts

@@ -4,7 +4,7 @@ export const REPAIR_CASE_MODEL_PATH = "/models/packderelance/model.gltf";
 export const REPAIR_CASE_OPEN_SOUND_PATH = "/sounds/effect/open-malette.mp3";
 export const REPAIR_CASE_CLOSE_SOUND_PATH = "/sounds/effect/close-malette.mp3";
 
-export const REPAIR_CASE_LID_NODE_NAME = "partiesup";
+export const REPAIR_CASE_LID_NODE_NAME = "partsup";
 export const REPAIR_CASE_CLOSED_ROTATION_OFFSET_DEGREES = 0;
 export const REPAIR_CASE_OPEN_ROTATION_OFFSET_DEGREES = 115;
 export const REPAIR_CASE_ANIMATION_DURATION = 0.8;
@@ -27,3 +27,50 @@ export const REPAIR_CASE_FOCUS_SCALE = 2.25;
 export const REPAIR_CASE_PLACEHOLDER_NAME_PREFIX = "placeholder_";
 export const REPAIR_CASE_PLACEHOLDER_SNAP_RADIUS = 0.65;
 export const REPAIR_CASE_PLACEHOLDER_SNAP_DURATION = 0.25;
+
+/**
+ * Names of nodes inside the packderelance GLTF where standalone part models
+ * are anchored (visually injected). The original meshes under these nodes are
+ * hidden at runtime so the standalone model takes their place.
+ *
+ * Some entries (e.g. `refroidisseur`) do not exist as nodes in the GLTF; an
+ * empty Object3D is created at mount time at the corresponding case-local
+ * fallback position so the anchoring pipeline is uniform.
+ */
+export const REPAIR_CASE_PART_ANCHOR_NAMES = [
+  "cabledroit",
+  "cablegauche",
+  "pucehaut",
+  "pucebas",
+  "refroidisseur",
+] as const;
+
+export type RepairCasePartAnchorName =
+  (typeof REPAIR_CASE_PART_ANCHOR_NAMES)[number];
+
+/**
+ * Case-local positions used when an anchor node is missing from the GLTF.
+ * Values are expressed in the case model's local coordinate system (the case
+ * is rendered at small intrinsic scale; magnitudes are in the 0.01-0.25 range
+ * to match the existing nodes such as `cabledroit`).
+ */
+export const REPAIR_CASE_PART_ANCHOR_FALLBACKS: Record<
+  RepairCasePartAnchorName,
+  Vector3Tuple
+> = {
+  cabledroit: [0.0087, 0.0139, 0.1921],
+  cablegauche: [0.0087, 0.0139, 0.2477],
+  pucehaut: [-0.0207, 0.009, -0.0479],
+  pucebas: [0.0987, 0.009, -0.0479],
+  refroidisseur: [0.05, 0.014, 0.05],
+};
+
+/**
+ * Quaternion applied to anchor nodes that are created at runtime (because
+ * the corresponding node is absent from the GLTF). Matches the rotation of
+ * the existing part nodes in packderelance to keep visual orientation
+ * consistent.
+ */
+export const REPAIR_CASE_PART_ANCHOR_FALLBACK_QUATERNION = [
+  0.7071068286895752, 0, 0, 0.7071068286895752,
+] as const satisfies readonly [number, number, number, number];