If what you see is NOT what you get
summary
Claims that four concrete fixes eliminate many UI-data mismatches and demonstrates them with examples and tools. A checkout example shows promotion applied but flag false and a 20% promo that never updates the amount due. Strategies list: analyze states exhaustively, make UI data driven so input changes state then UI, apply patterns like view controller factory and coordinator, add design systems and automated UI tests, and prefer full-screen refresh when state combine causes bugs.
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