When building AI-powered apps, GenAI is not the only source of latency. External banking APIs, database insertions, and model context generation add measurable seconds during initial user provisioning. For a new user, 10 seconds of a raw spinner or a blank screen means this app is broken. Today, I scrapped generic raw spinners. I moved away from a passive loading component and architected an immersive Provisioning state in React to manage cold-boot anxiety. React detects a new user (no transactions and no name in database). It forces a profile modal first. Only when the user hits Save does the application trigger the expensive data fetch and immediately invoke a conditional state. This activates a backdrop-blur glassmorphism full-screen overlay. The overlay replaces the Raw Spinner with a narrative sequence: provisioning agent, retrieving footprint, training models. The wait feels productive and professional, not broken.…