[MileStage] Add a feature for tracking late payments and scope creep

A year ago I could not write a single line of code. Today I have a live product with real users and real payments flowing through it. Here is what the process actually taught me. AI gets you 80% there surprisingly fast. The first version of MileStage came together quicker than I expected. Prompting an AI to build React components, set up Supabase tables, connect authentication, most of it just worked. That first 80% felt almost too easy and honestly that is where the overconfidence kicks in and things start going wrong. The last 20% is where you actually have to learn something. Stripe webhooks nearly broke me. Not because the AI could not help but because I did not understand enough about what was happening underneath to debug it when things went sideways. At some point the AI gives you code that looks right and still does not work and you have no idea why. That gap forced me to actually understand what I had built rather than just shipping what the AI produced. Shipping something broken to production is a great teacher. I did this more than once. Nothing clarifies your understanding of a system faster than watching it fail in front of real users and having to trace back exactly what went wrong. No tutorial prepares you for that feeling and nothing replaces it either. Your non-technical skills matter more than you think. Ten years of UI/UX design meant I could give precise feedback to the AI, catch bad design decisions instantly, and communicate exactly what I wanted. The code was mostly AI. The judgment about what to build and how it should feel was entirely mine. That combination turned out to be more powerful than either one alone. Build something you have lived yourself. The reason MileStage exists is because I dealt with late payments and scope creep for a decade as a freelance designer. That frustration was the brief. Every feature decision came from a real moment where something went wrong on a real project. Building from genuine experience is a completely different thing than building from a market opportunity you read about. If you have been sitting on an idea because you do not know how to code, the tools are genuinely good enough now. The barrier is lower than you think. The hard part is not the code.