feat: add embedded svelte frontend

README.md

@@ -531,7 +531,33 @@ Run the SQL migrations against a local database with:
 
 `DATABASE_URL=postgres://... make migrate`
 
-LLM integration instructions are served at `/llm`.
+### Backend + embedded UI build
+
+The web UI now lives in the top-level `ui/` module and is embedded into the Go binary at build time with `go:embed`.
+
+- `make build` — builds the Svelte/Tailwind frontend, then compiles the Go server
+- `make test` — runs `svelte-check` for the frontend and `go test ./...` for the backend
+- `make ui-build` — builds only the frontend into `internal/app/ui/dist`
+- `make ui-dev` — starts the Vite dev server with hot reload on `http://localhost:5173`
+
+### Local UI workflow
+
+For the normal production-style local flow:
+
+1. Start the backend: `./scripts/run-local.sh configs/dev.yaml`
+2. Open `http://localhost:8080`
+
+For frontend iteration with hot reload and no Go rebuilds:
+
+1. Start the backend once: `go run ./cmd/amcs-server --config configs/dev.yaml`
+2. In another shell start the UI dev server: `make ui-dev`
+3. Open `http://localhost:5173`
+
+The Vite dev server proxies backend routes such as `/api/status`, `/llm`, `/healthz`, `/readyz`, `/files`, `/mcp`, and the OAuth endpoints back to the Go server on `http://127.0.0.1:8080` by default. Override that target with `AMCS_UI_BACKEND` if needed.
+
+The root page (`/`) is now the Svelte frontend. It preserves the existing landing-page content and status information by fetching data from `GET /api/status`.
+
+LLM integration instructions are still served at `/llm`.
 
 ## Containers