feat: LokiDeploy 初始提交 - 轻量级 K8s Loki 部署平台

Go(Gin) + React(Vite + shadcn/ui + Tailwind) 前后端分离，全中文 UI

- 集群管理：Kubeconfig / Token 双接入，kubectl + helm 部署
- 主机管理：SSH 密钥 / 密码双认证，CPU/内存/磁盘使用率监控，SSH 错误中文友好提示
- 存储配置、部署管理、系统设置
- Docker 镜像内置 kubectl + helm，开箱即用
- run.sh 一键启停（start/stop/restart/status）

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

backend/controllers/host.go

@@ -0,0 +1,164 @@
+package controllers
+
+import (
+	"lokideploy/models"
+	"lokideploy/services"
+	"lokideploy/utils"
+
+	"github.com/gin-gonic/gin"
+)
+
+type HostController struct {
+	service *services.HostService
+}
+
+func NewHostController() *HostController {
+	return &HostController{service: services.NewHostService()}
+}
+
+type CreateHostRequest struct {
+	Name       string `json:"name" binding:"required"`
+	HostIP     string `json:"hostIP" binding:"required"`
+	Port       int    `json:"port"`
+	User       string `json:"user" binding:"required"`
+	AuthType   string `json:"authType" binding:"required,oneof=password key"`
+	Password   string `json:"password"`
+	PrivateKey string `json:"privateKey"`
+	KeyPhrase  string `json:"keyPhrase"`
+	OS         string `json:"os"`
+	Arch       string `json:"arch"`
+	Labels     string `json:"labels"`
+}
+
+func (ctrl *HostController) Create(c *gin.Context) {
+	var req CreateHostRequest
+	if !utils.BindAndValidate(c, &req) {
+		return
+	}
+	host, err := ctrl.service.Create(req.Name, req.HostIP, req.Port, req.User, req.AuthType,
+		req.Password, req.PrivateKey, req.KeyPhrase, req.OS, req.Arch, req.Labels)
+	if err != nil {
+		utils.Error(c, 400, err.Error())
+		return
+	}
+	utils.Success(c, models.SanitizedJSON(host))
+}
+
+func (ctrl *HostController) Get(c *gin.Context) {
+	id, err := utils.IntParam(c, "id")
+	if err != nil {
+		utils.BadRequest(c, "ID 无效")
+		return
+	}
+	host, err := ctrl.service.Get(uint(id))
+	if err != nil {
+		utils.NotFound(c, "主机不存在")
+		return
+	}
+	utils.Success(c, models.SanitizedJSON(host))
+}
+
+func (ctrl *HostController) List(c *gin.Context) {
+	page, pageSize := utils.Pagination(c)
+	hosts, total, err := ctrl.service.List(page, pageSize)
+	if err != nil {
+		utils.Error(c, 500, err.Error())
+		return
+	}
+	utils.Success(c, utils.PageData{
+		List:  models.SanitizedJSON(hosts),
+		Total: total, Page: page, PageSize: pageSize,
+	})
+}
+
+func (ctrl *HostController) Update(c *gin.Context) {
+	id, err := utils.IntParam(c, "id")
+	if err != nil {
+		utils.BadRequest(c, "ID 无效")
+		return
+	}
+	var updates map[string]interface{}
+	if !utils.BindAndValidate(c, &updates) {
+		return
+	}
+	if err := ctrl.service.Update(uint(id), updates); err != nil {
+		utils.Error(c, 400, err.Error())
+		return
+	}
+	utils.Success(c, gin.H{"message": "updated"})
+}
+
+func (ctrl *HostController) Delete(c *gin.Context) {
+	id, err := utils.IntParam(c, "id")
+	if err != nil {
+		utils.BadRequest(c, "ID 无效")
+		return
+	}
+	if err := ctrl.service.Delete(uint(id)); err != nil {
+		utils.Error(c, 400, err.Error())
+		return
+	}
+	utils.Success(c, gin.H{"message": "deleted"})
+}
+
+func (ctrl *HostController) Validate(c *gin.Context) {
+	id, err := utils.IntParam(c, "id")
+	if err != nil {
+		utils.BadRequest(c, "ID 无效")
+		return
+	}
+	go ctrl.service.Validate(uint(id))
+	utils.Success(c, gin.H{"message": "validation started"})
+}
+
+func (ctrl *HostController) GetInfo(c *gin.Context) {
+	id, err := utils.IntParam(c, "id")
+	if err != nil {
+		utils.BadRequest(c, "ID 无效")
+		return
+	}
+	host, err := ctrl.service.Get(uint(id))
+	if err != nil {
+		utils.NotFound(c, "主机不存在")
+		return
+	}
+
+	password := host.Password
+	if len(password) > 4 && password[:4] == "ENC:" {
+		password, _ = utils.Decrypt(password[4:])
+	}
+
+	client, err := services.NewSSHClient(host.HostIP, host.Port, host.User, password)
+	if err != nil {
+		utils.Error(c, 500, err.Error())
+		return
+	}
+	defer client.Close()
+
+	info, err := client.GetHostInfo(c.Request.Context())
+	if err != nil {
+		utils.Error(c, 500, err.Error())
+		return
+	}
+	utils.Success(c, info)
+}
+
+func (ctrl *HostController) Execute(c *gin.Context) {
+	id, err := utils.IntParam(c, "id")
+	if err != nil {
+		utils.BadRequest(c, "ID 无效")
+		return
+	}
+	var req struct {
+		Command string `json:"command" binding:"required"`
+	}
+	if !utils.BindAndValidate(c, &req) {
+		return
+	}
+	stdout, stderr, err := ctrl.service.ExecuteCommand(uint(id), req.Command)
+	if err != nil {
+		utils.Error(c, 500, err.Error())
+		return
+	}
+	utils.Success(c, gin.H{"stdout": stdout, "stderr": stderr})
+}