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Upon tapping the 'Copy link' button within the QR code modal, a dark toast notification containing the text 'Profile link copied' slides up from the bottom edge of the screen. The toast animates with a distinct spring physics curve, overshooting its final resting position slightly before settling. This tactile, bouncy motion aligns with Duolingo's characteristically playful design language, turning a routine confirmation into a delightful micro-interaction.
