Tanuj's Record-Collector As Built

The most-finished of the three microfrontend repos Tanuj split out. A standalone Next.js 15 app with a working ingest → configure → augment → export flow, a zustand-with-persist store, Perplexity-only LLM substrate, and one genuinely clever idea — the prompt template auto-generates from whatever columns the imported CSV has. Not the architecture we're keeping, but the field-aware prompt-generation idea is.