P4: Production hardening — reconnect, auto-scene-load, service cleanup

backend/Makefile

@@ -0,0 +1,66 @@
+# OPLabs Mixer Backend — install / uninstall / restart / status
+
+VENV := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))venv
+SERVICE := oplabs-mixer-backend.service
+SERVICE_PATH := /etc/systemd/system/$(SERVICE)
+UVICORN := $(VENV)/bin/uvicorn
+APP_DIR := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
+DAEMON_DIR := $(APP_DIR)../../oplabs-mixer-daemon
+
+.PHONY: install uninstall restart status start stop logs deps deps-daemon dev
+
+# Install systemd service and start it
+install: daemon-service-install
+	sudo cp $(SERVICE) $(SERVICE_PATH)
+	sudo systemctl daemon-reload
+	sudo systemctl enable $(SERVICE)
+	sudo systemctl restart $(SERVICE)
+	@echo "=== Service status ==="
+	sudo systemctl status --no-pager $(SERVICE)
+
+# Install the mixer daemon service (dependency for backend)
+daemon-service-install:
+	@if [ -f $(DAEMON_DIR)/Makefile ]; then \
+		echo "=== Installing mixer daemon service ==="; \
+		$(MAKE) -C $(DAEMON_DIR) install; \
+	else \
+		echo "WARNING: mixer-daemon repo not found at $(DAEMON_DIR)"; \
+		echo "Install the daemon service manually from its repo."; \
+	fi
+	sudo cp $(SERVICE) $(SERVICE_PATH)
+	sudo systemctl daemon-reload
+	sudo systemctl enable $(SERVICE)
+	sudo systemctl restart $(SERVICE)
+	@echo "=== Service status ==="
+	sudo systemctl status --no-pager $(SERVICE)
+
+# Remove systemd service
+uninstall:
+	sudo systemctl stop $(SERVICE) || true
+	sudo systemctl disable $(SERVICE) || true
+	sudo rm -f $(SERVICE_PATH)
+	sudo systemctl daemon-reload
+
+restart:
+	sudo systemctl restart $(SERVICE)
+	sudo systemctl status --no-pager $(SERVICE)
+
+status:
+	sudo systemctl status --no-pager $(SERVICE)
+
+start:
+	sudo systemctl start $(SERVICE)
+
+stop:
+	sudo systemctl stop $(SERVICE)
+
+logs:
+	sudo journalctl -u $(SERVICE) -n 100 -f
+
+# Install Python deps
+deps:
+	$(VENV)/bin/pip install -r requirements.txt
+
+# Run dev server (no systemd, hot-reload)
+dev:
+	$(UVICORN) app:app --host 0.0.0.0 --port 8081 --reload --log-level info