add: focus repair case view

docs/user/main-feature.md

@@ -16,7 +16,7 @@ The current user flow is:
 6. Press `E` or hold both fists closed for one second to move from `inspected` to `fragmented`.
 7. The mission object uses an exploded-model transition, then moves to `scanning`.
 8. The scan visual moves across the fragmented model one part at a time and keeps a red marker plus the `cassé.webm` prompt centered on any configured broken part once it has been found.
-9. In `repairing`, the case opens and several grabbable replacement parts appear near the case.
+9. In `repairing`, the case opens in a larger focused view and several grabbable replacement parts appear near it.
 10. Move the correct replacement part close to the install target.
 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. The repair case closes, returns to the ground, disappears, then `completeMission` moves to the next mission or to `outro` after `ferme`.
@@ -33,7 +33,7 @@ When the player inspects the object, `RepairGame` writes `inspected` through the
 
 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`, the exploded model remains visible, a blue scan visual moves from part to part, and a red halo/wire marker plus the configured broken UI video stay attached to configured broken parts after the scanner reaches them. The scan can match a specific `nodeName` when mission data provides one, otherwise it falls back to the first scanned parts as placeholder broken parts. 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 plays the case exit animation before advancing the global mission progression.
+In `fragmented`, the repair object is rendered with `ExplodableModel`, then automatically advances to `scanning`. In `scanning`, the exploded model remains visible, a blue scan visual moves from part to part, and a red halo/wire marker plus the configured broken UI video stay attached to configured broken parts after the scanner reaches them. The scan can match a specific `nodeName` when mission data provides one, otherwise it falls back to the first scanned parts as placeholder broken parts. In `repairing`, the case opens in a larger focused transform, several grabbable replacement parts appear around that focused case view, 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 plays the case exit animation before advancing the global mission progression.
 
 ## Key Files