clean: remove obsolete repair debug code + unused core utilities

docs/user/main-feature.md

@@ -21,27 +21,22 @@ The current user flow is:
 11. Press `E` on the green install target to move to `done` and show the reassembled object. Wrong parts turn the target red and cannot finish the repair.
 12. Press `E` on the completion target to call `completeMission` and move to the next mission, or to `outro` after `ferme`.
 
-The older debug repair sandbox still exists in the physics test scene, but the production path now starts from the reusable `RepairGame` component.
-
 ## Why It Matters
 
-This feature validates the core repair fantasy before a full mission system exists. It tests whether repair objects, physical proximity, model selection, audio feedback, and exploded model visualization can work together in the 3D scene.
+This feature validates the repair loop before a full mission system exists. It tests whether repair objects, physical proximity, model selection, audio feedback, and exploded model visualization can work together in the 3D scene.
 
 ## Current Behavior
 
 In `waiting`, the active mission renders its repair object and the `interagir.webm` prompt in the game scene. The interaction uses the shared focus/raycast interaction system, so the player still gets the normal `E` prompt.
 
-When the player inspects the object, `RepairGame` writes `inspected` through the generic mission store action. The repair case then appears from the mission config. When the player is close enough, the existing case model floats upward and rotates gently to signal interactivity.
+When the player inspects the object, `RepairGame` writes `inspected` through the generic mission store action. The repair case then appears from the mission config with a small pop animation. When the player is close enough, the existing case model floats upward and rotates gently to signal interactivity.
 
 In `inspected`, `RepairGame` can also move to `fragmented`. The player can use the interaction key or hold both fists closed for one second. The hand-tracking path is state-based, so it does not depend on being inside a local object interaction radius.
 
 In `fragmented`, the repair object is rendered with `ExplodableModel`, then automatically advances to `scanning`. In `scanning`, a blue scan visual and the `cassé.webm` prompt are shown before the flow advances to `repairing`. In `repairing`, the case opens, several grabbable replacement parts appear, and the install target only validates the configured correct part for the active mission. In `done`, the repaired object remains visible with a completion target that advances the global mission progression.
 
-Repair module slots and model-selection behavior still exist in the debug prototype. They can be migrated into the reusable repair flow in later steps if the repair interaction needs more depth.
-
 ## Key Files
 
-- `src/world/debug/TestMap.tsx` mounts the repair-game prototype in the debug physics scene.
 - `src/world/GameStageContent.tsx` mounts production `RepairGame` instances for `bike`, `pylone`, and `ferme`.
 - `src/components/three/gameplay/RepairCompletionStep.tsx` renders the final repaired object, completion target, and mission UI prompt.
 - `src/components/three/gameplay/RepairGame.tsx` composes the reusable production repair flow.
@@ -53,14 +48,10 @@ Repair module slots and model-selection behavior still exist in the debug protot
 - `src/hooks/gameplay/useRepairFragmentationInput.ts` handles the `inspected -> fragmented` keyboard and hand-tracking input.
 - `src/hooks/gameplay/useRepairMissionStep.ts` reads the active mission step from the game store.
 - `src/hooks/handTracking/useBothFistsHold.ts` detects the reusable two-fists hold gesture.
-- `src/components/three/gameplay/RepairGameZone.tsx` composes the repair-game zone.
-- `src/components/three/gameplay/RepairCaseObject.tsx` connects the repair case to trigger interaction and audio.
 - `src/components/three/gameplay/RepairCaseModel.tsx` renders and animates the case model.
-- `src/components/three/gameplay/RepairModuleSlot.tsx` renders repair slots and model selection behavior.
 - `src/components/three/models/ExplodableModel.tsx` renders selectable models with split/exploded visualization.
 - `src/data/gameplay/repairCaseConfig.ts` stores repair case model, sound, and animation constants.
-- `src/data/gameplay/repairGameConfig.ts` stores repair zone and slot positions.
-- `src/data/gameplay/repairGameModelCatalog.ts` stores selectable repair models.
+- `src/data/gameplay/repairGameConfig.ts` stores repair flow timing constants.
 - `src/data/gameplay/repairMissions.ts` stores reusable repair mission config for `bike`, `pylone`, and `ferme`.
 - `src/managers/stores/useGameStore.ts` stores mission progression state and generic mission step helpers.