feat(m6): CSV export, Makefile, README, single-binary build

Makefile

@@ -0,0 +1,34 @@
+.PHONY: build build-web build-go dev test clean
+
+# Build the production single binary (embeds the Svelte SPA)
+build: build-web build-go
+
+build-web:
+	@echo "==> Building Svelte frontend..."
+	cd web && npm run build
+
+build-go:
+	@echo "==> Building Go binary (production, embeds web/build)..."
+	go build -tags production -o wotra ./cmd/wotra
+
+# Development mode: run Go server + Vite dev server concurrently
+dev:
+	@echo "==> Starting development servers..."
+	@echo "    Go API:  http://localhost:8080"
+	@echo "    Vite UI: http://localhost:5173"
+	@trap 'kill 0' INT; \
+	  AUTH_TOKEN=$${AUTH_TOKEN:-devtoken} go run ./cmd/wotra & \
+	  cd web && npm run dev
+
+# Run all Go tests
+test:
+	go test ./...
+
+# Install frontend dependencies
+web/node_modules:
+	cd web && npm install
+
+# Remove build artifacts
+clean:
+	rm -f wotra
+	rm -rf web/build web/.svelte-kit