chore(talkie): consolidate to single GLB, remove orphan LOD assets

- Replace public/models/talkie/* (PNG textures + .bin + .gltf) with single model.glb
- Delete unused public/models/talkie-LOD/ folder (no longer referenced in MAP_LOD_MODEL_PATHS)
- Remove farm-radio-distractor (talkie) from farm repair mission distractors

src/data/gameplay/repairMissions.ts

@@ -129,11 +129,6 @@ export const REPAIR_MISSIONS: Record<RepairMissionId, RepairMissionConfig> = {
         label: "Tree sensor",
         modelPath: "/models/sapin/model.gltf",
       },
-      {
-        id: "farm-radio-distractor",
-        label: "Radio module",
-        modelPath: "/models/talkie/model.glb",
-      },
     ],
   },
 };