feat: add build_service and start_service functions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/dev.sh

@@ -53,3 +53,52 @@ DB_USER="${DB_USER:-haihuizhu}"
 DB_PASSWORD="${DB_PASSWORD:-admin}"
 DB_NAME="${DB_NAME:-top-fans}"
 DB_ARGS=(-db-host="$DB_HOST" -db-port="$DB_PORT" -db-user="$DB_USER" -db-password="$DB_PASSWORD" -db-name="$DB_NAME")
+
+# 启动一个服务
+# 用法: start_service name binary port use_db
+start_service() {
+    local name=$1
+    local binary=$2
+    local port=$3
+    local use_db=$4
+
+    echo -e "${GREEN}🚀 启动 $name...${NC}"
+
+    if [ "$use_db" = "1" ]; then
+        "$SCRIPT_DIR/$binary" -port=$port "${DB_ARGS[@]}" > "/tmp/${name}.log" 2>&1 &
+    else
+        "$SCRIPT_DIR/$binary" -port=$port > "/tmp/${name}.log" 2>&1 &
+    fi
+    local pid=$!
+
+    sleep 2
+
+    if ps -p $pid > /dev/null 2>&1; then
+        echo -e "${GREEN}✅ $name 已启动 (PID: $pid, 端口: $port)${NC}"
+    else
+        echo -e "${RED}❌ $name 启动失败${NC}"
+        echo -e "${YELLOW}查看日志: tail -f /tmp/${name}.log${NC}"
+    fi
+}
+
+# 构建一个服务（在服务目录下执行 go build）
+# 用法: build_service name dir binary
+build_service() {
+    local name=$1
+    local dir=$2
+    local binary=$3
+
+    if [ ! -d "$SCRIPT_DIR/$dir" ]; then
+        echo -e "${RED}❌ $dir 目录不存在${NC}"
+        return 1
+    fi
+
+    cd "$SCRIPT_DIR/$dir"
+    if go build -o "$SCRIPT_DIR/$binary" . 2>&1; then
+        echo -e "${GREEN}✅ $name 编译成功${NC}"
+        return 0
+    else
+        echo -e "${RED}❌ $name 编译失败${NC}"
+        return 1
+    fi
+}