feat: 패시브 트리 레이아웃 자동화 및 UI 정리

- 패시브 트리 노드 배치를 삼각형 기반 자동 배치 구조로 전환하고 축 및 브릿지 반경을 재정리\n- 패시브 UI 프리팹과 런타임 렌더링을 수정해 노드 겹침, 링크 관통, 상태별 간격 변화, 하단 여백 문제를 정리\n- 프로토타입 패시브 노드, 트리, 프리셋 자산을 재생성해 최신 레이아웃과 확장 노드 구성을 반영

Assets/_Game/Prefabs/UI/PassiveTree/UI_PassiveTreeNode.prefab

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 --- !u!222 &8268640799320570731
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@@ -152,6 +153,7 @@ MonoBehaviour:
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   rootRect: {fileID: 6261231552513207993}
   backgroundImage: {fileID: 448894188463328570}
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   innerImage: {fileID: 3476538439727275718}
   button: {fileID: 2832153398621926819}
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