feat: 五项目业务实现并对接完成

- MES(B): 工单/BOM/备料/工序字典/PLC下发/拧紧/扫码报工/半成品/AGV/追溯逻辑，WMS与海康RCS客户端，看板Redis缓存API(概览/设备/进度/报警/趋势)+SSE
- WMS(C): JWT滑动续签、Excel导入、盘点、内部API、种子数据、独立Postgres配置
- WMS客户端(E): Go网关8891反向代理+内嵌Vue3十页
- 工位终端(D): SQLite本地缓存+模拟拧紧源+内嵌Vue3页面
- Dashboard(A): 看板数据改接MES内部缓存API，SSE实时刷新+vite代理
- 清理各项目球形磨遗留代码，新增部署手册.md

bj_power_wms/internal/handler/zone.go

@@ -0,0 +1,63 @@
+package handler
+
+import (
+	"net/http"
+
+	"bj_power_wms/ent"
+	"bj_power_wms/ent/zone"
+	"bj_power_wms/internal/svc"
+)
+
+// createZoneHandler 创建区域
+func createZoneHandler(ctx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var req struct {
+			ZoneCode    string `json:"zoneCode"`
+			ZoneName    string `json:"zoneName"`
+			Description string `json:"description"`
+		}
+		if err := parseJSON(r, &req); err != nil {
+			fail(w, http.StatusBadRequest, "参数错误")
+			return
+		}
+		if req.ZoneCode == "" || req.ZoneName == "" {
+			fail(w, http.StatusBadRequest, "zoneCode 和 zoneName 必填")
+			return
+		}
+
+		exists, err := ctx.EntClient.Zone.Query().
+			Where(zone.ZoneCodeEQ(req.ZoneCode)).
+			Exist(ctx0())
+		if err != nil {
+			fail(w, http.StatusInternalServerError, err.Error())
+			return
+		}
+		if exists {
+			fail(w, http.StatusConflict, "区域编码已存在")
+			return
+		}
+
+		z, err := ctx.EntClient.Zone.Create().
+			SetZoneCode(req.ZoneCode).
+			SetZoneName(req.ZoneName).
+			SetNillableDescription(strPtr(req.Description)).
+			Save(ctx0())
+		if err != nil {
+			fail(w, http.StatusInternalServerError, err.Error())
+			return
+		}
+		ok(w, z)
+	}
+}
+
+// listZonesHandler 区域列表
+func listZonesHandler(ctx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		list, err := ctx.EntClient.Zone.Query().Order(ent.Desc("id")).All(ctx0())
+		if err != nil {
+			fail(w, http.StatusInternalServerError, err.Error())
+			return
+		}
+		ok(w, list)
+	}
+}