add: configure mission-specific repair variants

docs/user/main-feature.md

@@ -37,6 +37,8 @@ In `inspected`, `RepairGame` can also move to `fragmented`. The player can use t
 
 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, `RepairCaseModel` traverses the case GLTF for empty nodes named `placeholder_*`, several grabbable replacement parts appear on those placeholder positions, and releasing a part near a placeholder snaps it into place with a short GSAP animation. Scanned broken parts are also rendered as grabbable objects and must be deposited into a compatible placeholder before the final install target validates. If `brokenParts[].placeholderName` is configured, that broken part snaps only to the matching placeholder; otherwise it can use any available placeholder. If the current case asset has no placeholder nodes, the flow keeps using fallback focus positions. The install target only validates when the configured correct replacement part is placed and all scanned broken parts have been deposited. In `reassembling`, the exploded model animates back into its assembled position with green completion particles before the flow moves to `done`. In `done`, the repaired object remains visible with a completion target that plays the case exit animation before advancing the global mission progression.
 
+The mission config now carries the mission-specific variations. `bike` repairs one cooling core, `pylone` scans and stores both the lamp relay and a damaged panel with slower scan/reassembly timing, and `ferme` scans and stores an irrigation pump plus humidity sensor with faster scan/reassembly timing.
+
 ## Key Files
 
 - `src/world/GameStageContent.tsx` mounts production `RepairGame` instances for `bike`, `pylone`, and `ferme`.