Please provide the code changes or file diffs you would like me to summarize.

Makefile

@@ -1,22 +1,28 @@
-.PHONY: help build up down restart logs ps
+.PHONY: help build up up-build down restart logs ps
 
 COMPOSE_FILE := docker/docker-compose.yml
 COMPOSE := docker compose -f $(COMPOSE_FILE)
 
 help:
 	@printf "Available targets:\n"
-	@printf "  make build    Build Docker images\n"
-	@printf "  make up       Build and start services in background\n"
-	@printf "  make down     Stop and remove services\n"
-	@printf "  make restart  Restart services\n"
-	@printf "  make logs     Follow service logs\n"
-	@printf "  make ps       Show service status\n"
+	@printf "  make build      Build Docker images (with cache)\n"
+	@printf "  make up         Start services (NO rebuild, reuse existing image)\n"
+	@printf "  make up-build   Rebuild image then start (use after code changes)\n"
+	@printf "  make down       Stop and remove services\n"
+	@printf "  make restart    Restart services without rebuild\n"
+	@printf "  make logs       Follow service logs\n"
+	@printf "  make ps         Show service status\n"
 	@printf "  Note: do not use 'docker compose down -v' in daily usage (it removes persistent volumes)\n"
 
 build:
 	$(COMPOSE) build
 
+# 日常启动：直接用已有镜像，不重新构建（秒启动）
 up:
+	$(COMPOSE) up -d
+
+# 代码有改动时使用：重新构建镜像再启动
+up-build:
 	$(COMPOSE) build
 	$(COMPOSE) up -d
 
@@ -24,8 +30,7 @@ down:
 	$(COMPOSE) down
 
 restart:
-	$(COMPOSE) down
-	$(COMPOSE) up -d
+	$(COMPOSE) restart
 
 logs:
 	$(COMPOSE) logs -f