Phase 0: project scaffold

- Go module + chi server with embedded SPA serving and /api/health
- internal/config env loader (local-dev defaults; auth/copyleaks deferred)
- React 19 + Vite 6 + Tailwind v4 frontend with full Petal design tokens
- Frontend embedded into the binary via web/embed.go (go:embed all:dist)
- README dev workflow, .env.example, BUILD_PLAN progress tracker
- Verified end-to-end: binary serves health, embedded SPA, and SPA fallback

README.md

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+# 🌸 Petal
+
+A self-hosted, privacy-first writing editor with warm bubbly design, auto-save, and
+local-LLM grammar/ESL suggestions. See [`petal-spec.md`](./petal-spec.md) for the full
+design spec and [`BUILD_PLAN.md`](./BUILD_PLAN.md) for build progress.
+
+## Stack
+Go + chi backend · SQLite (modernc, pure Go) · React + Vite + Tiptap + Tailwind v4 frontend ·
+local vLLM/Ollama for AI suggestions. Single-binary deployment (frontend embedded via `go:embed`).
+
+## Local development
+
+Two processes during development:
+
+```bash
+# 1. Backend (serves /api on :8080)
+go run ./cmd/server
+
+# 2. Frontend dev server (HMR on :5173, proxies /api → :8080)
+cd web && npm install && npm run dev
+```
+
+Open http://localhost:5173 while developing.
+
+## Production build (single binary)
+
+```bash
+cd web && npm run build      # emits web/dist (embedded by the Go binary)
+cd .. && go build -o petal ./cmd/server
+./petal                      # serves UI + API on :8080
+```
+
+Configuration is via environment variables — copy `.env.example` to `.env`.
+
+## Status
+Early build, multi-session. Auth (Authentik), Copyleaks plagiarism, and Docker/Traefik
+deployment are deferred — see `BUILD_PLAN.md`.