feat: 重构前后端架构，添加Go后端和Python Agent服务

- 新增 Go 语言后端服务(server/)，包含用户认证、Agent管理、数据库连接等API
- 新增 Python Agent 服务(agent/)，实现Agent核心逻辑和工具集
- 前端从原生HTML迁移到Vue.js框架(web/src/)
- 添加 Docker Compose 支持(docker-compose.yml)
- 添加项目架构文档(docs/ARCHITECTURE.md)
- 添加环境变量示例(.env.example)和本地启动脚本(start-local.ps1)

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

server/internal/handler/sub_table_handler.go

@@ -0,0 +1,132 @@
+package handler
+
+import (
+	"net/http"
+
+	"x-agents/server/internal/model"
+	"x-agents/server/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+type SubTableHandler struct {
+	service *service.SubTableService
+}
+
+func NewSubTableHandler(svc *service.SubTableService) *SubTableHandler {
+	return &SubTableHandler{service: svc}
+}
+
+// Create 创建子表信息
+func (h *SubTableHandler) Create(c *gin.Context) {
+	var req model.CreateSubTableRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	info, err := h.service.Create(req)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusCreated, info)
+}
+
+// GetByID 获取详情
+func (h *SubTableHandler) GetByID(c *gin.Context) {
+	id := c.Param("id")
+
+	info, err := h.service.GetByID(id)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, info)
+}
+
+// ListByDatabase 获取数据库下所有子表
+func (h *SubTableHandler) ListByDatabase(c *gin.Context) {
+	databaseID := c.Param("database_id")
+
+	list, err := h.service.ListByDatabaseID(databaseID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	if list == nil {
+		list = []model.SubTableInfo{}
+	}
+
+	c.JSON(http.StatusOK, gin.H{"list": list})
+}
+
+// GetMappingFromFile 从文件获取映射
+func (h *SubTableHandler) GetMappingFromFile(c *gin.Context) {
+	databaseID := c.Param("database_id")
+
+	mapping, err := h.service.GetMappingFromFile(databaseID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	if mapping == nil {
+		c.JSON(http.StatusOK, gin.H{"mapping": nil, "message": "no mapping file found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"mapping": mapping})
+}
+
+// Update 更新
+func (h *SubTableHandler) Update(c *gin.Context) {
+	id := c.Param("id")
+
+	var req model.UpdateSubTableRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	info, err := h.service.Update(id, req)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, info)
+}
+
+// Delete 删除
+func (h *SubTableHandler) Delete(c *gin.Context) {
+	id := c.Param("id")
+
+	err := h.service.Delete(id)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{"message": "deleted"})
+}
+
+// GetTablesDDL 获取数据库下所有表及DDL
+func (h *SubTableHandler) GetTablesDDL(c *gin.Context) {
+	databaseID := c.Param("database_id")
+
+	tables, err := h.service.GetTableDDLFromDatabase(databaseID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	if tables == nil {
+		tables = []model.TableDDLInfo{}
+	}
+
+	c.JSON(http.StatusOK, gin.H{"tables": tables})
+}