Bug: @typescript-eslint/prefer-nullish-coalescing mal-fixes nested condition

Bug: @typescript-eslint/prefer-nullish-coalescing mal-fixes nested condition: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). https://typescript-eslint.io/play/…

The task

https://typescript-eslint.io/play/#ts=5.7.2&showAST=types&fileType=.tsx&code=DYUwLgBAhgXBDOYBOBLAdgcwgHwgVzQBMQAzdEQgKFEgCM4BvCAWxHnigxDkVUwgC%2BOfEVLkqAYwD2aRBEgBeCAAowPZOgwBKCAoB88ypWmzIJKVN3RKEW3YD81u3bi0bzhxFoA6Vu04g7h4QcGDKAEQYwFK0UMDeIEhIUkjeBADWaFIA7mjhWpRAA&eslintrc=N4KABGBEBOCuA2BTAzpAXGUEKQAIBcBPABxQGNoBLY-A…

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.