React Nativeではナビゲーションはどのように機能しますか？

Navigation isn't built into React Native → use REACT NAVIGATION (the de facto standard):
  → provides NAVIGATORS that structure how users move between screens:
    STACK navigator → push/pop screens (like a stack — forward/back, the most common)
    TAB navigator → bottom/top tabs (switch between sections)
    DRAWER navigator → a side drawer menu
  → handles navigation state, history (back stack), transitions, headers

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