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The interaction features a horizontal ruler-style timeline picker used to navigate daily check-ins. As the user drags or scrubs horizontally, the ruler slides smoothly with realistic momentum and deceleration. A green highlight bar represents active check-in periods, which moves dynamically off-screen as the timeline is scrolled to higher numbers (such as 50, 75, and 300). The tick marks and numeric labels scale and slide fluidly, providing a tactile, high-precision feel for navigating historical data.
