update: stabilize repair mission stage mounting

src/world/GameStageContent.tsx

@@ -1,5 +1,6 @@
 import { RepairGame } from "@/components/three/gameplay/RepairGame";
 import { useGameStore } from "@/managers/stores/useGameStore";
+import type { RepairMissionId } from "@/types/gameplay/repairMission";
 import type { Vector3Tuple } from "@/types/three/three";
 
 interface StageAnchorProps {
@@ -8,6 +9,26 @@ interface StageAnchorProps {
   scale?: number;
 }
 
+interface GameRepairZone {
+  mission: RepairMissionId;
+  position: Vector3Tuple;
+}
+
+const GAME_REPAIR_ZONES = [
+  {
+    mission: "bike",
+    position: [8, 0, -6],
+  },
+  {
+    mission: "pylone",
+    position: [64, 0, -66],
+  },
+  {
+    mission: "ferme",
+    position: [-24, 0, 42],
+  },
+] as const satisfies readonly GameRepairZone[];
+
 function StageAnchor({
   color,
   position,
@@ -30,16 +51,21 @@ function StageAnchor({
 export function GameStageContent(): React.JSX.Element {
   const mainState = useGameStore((state) => state.mainState);
 
-  switch (mainState) {
-    case "intro":
-      return <StageAnchor color="#7dd3fc" position={[0, 4, 0]} />;
-    case "bike":
-      return <RepairGame mission="bike" position={[8, 0, -6]} />;
-    case "pylone":
-      return <RepairGame mission="pylone" position={[64, 0, -66]} />;
-    case "ferme":
-      return <RepairGame mission="ferme" position={[-24, 0, 42]} />;
-    case "outro":
-      return <StageAnchor color="#fb7185" position={[0, 6, 10]} scale={1.25} />;
-  }
+  return (
+    <>
+      {mainState === "intro" ? (
+        <StageAnchor color="#7dd3fc" position={[0, 4, 0]} />
+      ) : null}
+      {GAME_REPAIR_ZONES.map((zone) => (
+        <RepairGame
+          key={zone.mission}
+          mission={zone.mission}
+          position={zone.position}
+        />
+      ))}
+      {mainState === "outro" ? (
+        <StageAnchor color="#fb7185" position={[0, 6, 10]} scale={1.25} />
+      ) : null}
+    </>
+  );
 }