Update repair-game.md to reflect the recent flow refactor:
- single ExplodableModel mounted across fragmented -> done
- splitSpeed for slower, more deliberate explosion
- ebike repairing simplified to a single 'Changez le refroidisseur' trigger
- ebike done auto-completes on narrateur_ebikerepare's ended event
- narrator ownership table clarified (narrator vs scan sequence vs repair game)
- Add RepairFocusBubble + useRepairFocusStore to the main files table.
- New 'Focus Bubble' section documenting the shroud lifecycle, the
cocoon decor pass and the vegetation/zone-overlay hide hook.
- Update the 'Fragmented' section to describe the recursive descent in
ExplodedModel.createParts and the new modelRotation field used to
align the fragmented model with the world-space source.
- Drop the stale reference to useRepairMovementLocked (removed in a
prior commit).
Tom Boullay