Fix Gutenberg keyboard hide observer to handle dismissal notifications

[Copilot]

This stacked PR addresses feedback from the SwiftLint follow-up thread by fixing a pre-existing observer wiring bug in GutenbergViewController. The hide observer was incorrectly subscribed to keyboard show notifications, preventing the hide path from running on keyboard dismissal.

• Observer wiring

  • Changed keyboardHideObserver to subscribe to UIResponder.keyboardDidHideNotification instead of UIResponder.keyboardDidShowNotification.

• Behavioral impact

  • Restores expected keyboard-dismiss handling so editor constraints can be updated when the keyboard hides.

keyboardHideObserver = NotificationCenter.default.addObserver(
    forName: UIResponder.keyboardDidHideNotification,
    object: nil,
    queue: .main
) { [weak self] notification in
    if let self, let keyboardRect = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect {
        self.keyboardFrame = keyboardRect
        self.updateConstraintsToAvoidKeyboard(frame: keyboardRect)
    }
}

[dangermattic]

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[mokagio]

@crazytonyli @jkmassel this makes sense to me: The hide observer should subscribe to the hide notification. But you'll sure have more context on the choices of implementation.

[Copilot]

Pull request overview

Fixes keyboard dismissal handling in the Gutenberg editor by correcting a miswired notification observer so constraint updates run when the keyboard actually hides.

Changes:

• Updated keyboardHideObserver to subscribe to UIResponder.keyboardDidHideNotification (instead of keyboardDidShowNotification).
• Restores the keyboard-dismiss path so updateConstraintsToAvoidKeyboard is invoked on dismissal.

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[crazytonyli]

Looks like a copy-pasta error.