Stand Up @dididecks/shell and Ship the Chroma TOC + Slide-Ranking UI
Phase A of the exploration that landed on `@dididecks/shell` as the path to chroma-↔-calmstorm parity. Scaffold `apps/deck-shell/` inside the dididecks-ai monorepo as an Astro integration; ship two seed routes (TOC + slide-ranking pills) and one decomposition-stub generator that bridges the deck-iteration-workflow Phase 1 → Phase 2 transition; install in `client-sites/chroma-decks/` first via local link, then via a v0.1.0 publish to a private pnpm-scoped npm registry. Each client-site stays a standalone repo on its own Vercel project; the shell is the only thing that travels.