feat: add one-click startup scripts for project management

- Add start.sh/start.bat for one-click startup (backend + frontend)
- Add stop.sh/stop.bat for stopping all services
- Add restart.sh for restarting services
- Add status.sh for checking service status
- Add Makefile with convenient management commands
- Add comprehensive documentation (ONE_CLICK_START.md)
- Update README with one-click startup instructions

Features:
- Automatic environment checking (venv, node_modules)
- Process management with PID tracking
- Unified log management (logs/*.log)
- Health checking after startup
- Support for Linux, macOS, and Windows
- No more need for multiple terminal windows

Usage:
  ./start.sh      # Start all services
  ./stop.sh       # Stop all services
  ./status.sh     # Check service status
  ./restart.sh    # Restart services
  make start      # Alternative using Makefile

Benefits:
- One command instead of multiple terminals
- Automatic environment validation
- Centralized logging
- Process lifecycle management
- Developer-friendly output messages

status.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+# ERP AI Assistant - 状态检查脚本
+
+# 颜色定义
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# 项目根目录
+PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PID_FILE="$PROJECT_ROOT/logs/pids.txt"
+
+echo -e "${BLUE}========================================${NC}"
+echo -e "${BLUE}   ERP AI Assistant - 服务状态${NC}"
+echo -e "${BLUE}========================================${NC}"
+echo ""
+
+# 检查后端
+echo -e "${YELLOW}后端服务:${NC}"
+if curl -s http://localhost:8000/health > /dev/null 2>&1; then
+    HEALTH=$(curl -s http://localhost:8000/health)
+    echo -e "  状态: ${GREEN}✓ 运行中${NC}"
+    echo -e "  地址: http://localhost:8000"
+    echo -e "  API文档: http://localhost:8000/docs"
+    echo -e "  健康检查: $HEALTH"
+else
+    echo -e "  状态: ${RED}✗ 未运行${NC}"
+fi
+
+echo ""
+
+# 检查前端
+echo -e "${YELLOW}前端服务:${NC}"
+if curl -s http://localhost:5173 > /dev/null 2>&1; then
+    echo -e "  状态: ${GREEN}✓ 运行中${NC}"
+    echo -e "  地址: http://localhost:5173"
+else
+    echo -e "  状态: ${RED}✗ 未运行${NC}"
+fi
+
+echo ""
+
+# 显示进程信息
+if [ -f "$PID_FILE" ]; then
+    echo -e "${YELLOW}进程信息:${NC}"
+    while read pid; do
+        if kill -0 "$pid" 2>/dev/null; then
+            PROCESS_INFO=$(ps -p "$pid" -o pid,ppid,cmd --no-headers 2>/dev/null || echo "$pid (进程信息不可用)")
+            echo -e "  ${GREEN}✓${NC} PID $PROCESS_INFO"
+        else
+            echo -e "  ${RED}✗${NC} PID $pid (已停止)"
+        fi
+    done < "$PID_FILE"
+else
+    echo -e "${YELLOW}未找到 PID 文件${NC}"
+fi
+
+echo ""
+echo -e "${BLUE}========================================${NC}"
+echo ""
+
+# 日志提示
+if [ -d "$PROJECT_ROOT/logs" ]; then
+    echo -e "${YELLOW}💡 查看日志:${NC}"
+    echo -e "  后端: tail -f $PROJECT_ROOT/logs/backend.log"
+    echo -e "  前端: tail -f $PROJECT_ROOT/logs/frontend.log"
+    echo ""
+fi