feat: add embedded svelte frontend

Dockerfile

@@ -1,3 +1,13 @@
+FROM node:22-bookworm AS ui-builder
+
+WORKDIR /src/ui
+
+COPY ui/package.json ui/package-lock.json ./
+RUN npm ci
+
+COPY ui/ ./
+RUN npm run build
+
 FROM golang:1.26.1-bookworm AS builder
 
 WORKDIR /src
@@ -6,6 +16,7 @@ COPY go.mod go.sum ./
 RUN go mod download
 
 COPY . .
+COPY --from=ui-builder /src/internal/app/ui/dist ./internal/app/ui/dist
 
 RUN set -eu; \
     VERSION_TAG="$(git describe --tags --exact-match 2>/dev/null || echo dev)"; \