feat: 完成MES工位终端系统全量功能迭代

本次提交包含以下核心变更：
1. 新增按钮级权限控制框架与前端权限校验
2. 新增工位管理、工艺流程、巡检终端等核心业务模块
3. 完善用户体系，支持工位终端专属登录权限
4. 新增文件上传下载、报表查询等配套功能
5. 修复多系统兼容性与交互体验问题
6. 完成所有文档与配置项的规范化更新

bj_power_mes/internal/handler/processflow.go

@@ -0,0 +1,100 @@
+package handler
+
+import (
+	"net/http"
+
+	"bj_power_mes/common/httpx"
+	"bj_power_mes/internal/logic"
+	"bj_power_mes/internal/svc"
+)
+
+// ListProcessFlowsHandler GET /process-flows?processCode=
+func ListProcessFlowsHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		code := atoiDefault(r.URL.Query().Get("processCode"), 0)
+		data, err := logic.New(svcCtx).ListFlows(r.Context(), code)
+		if err != nil {
+			httpx.Fail(w, 2201, err.Error())
+			return
+		}
+		httpx.Ok(w, data)
+	}
+}
+
+// SaveProcessFlowHandler POST /process-flows（新建或更新工艺流程，含步骤模板）
+func SaveProcessFlowHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var req logic.FlowReq
+		if err := httpx.ParseJSON(r, &req); err != nil {
+			httpx.BadRequest(w, "请求体解析失败")
+			return
+		}
+		if err := logic.New(svcCtx).SaveFlow(r.Context(), req, operator(r, "")); err != nil {
+			httpx.Fail(w, 2202, err.Error())
+			return
+		}
+		httpx.OkMessage(w, "工艺流程已保存", nil)
+	}
+}
+
+// DeleteProcessFlowHandler DELETE /process-flows/:id
+func DeleteProcessFlowHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if err := logic.New(svcCtx).DeleteFlow(r.Context(), pathId(r), operator(r, "")); err != nil {
+			httpx.Fail(w, 2203, err.Error())
+			return
+		}
+		httpx.OkMessage(w, "工艺流程已删除", nil)
+	}
+}
+
+// UploadPdfHandler POST /process-flows/upload（工艺图纸PDF上传，返回文件名）
+func UploadPdfHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if err := r.ParseMultipartForm(32 << 20); err != nil {
+			httpx.BadRequest(w, "上传文件过大或格式错误")
+			return
+		}
+		name, err := saveUploadFile(r, "file", svcCtx.Config.Upload.Dir)
+		if err != nil {
+			httpx.Fail(w, 2204, "文件保存失败："+err.Error())
+			return
+		}
+		httpx.Ok(w, map[string]any{"filename": name, "url": "/api/v1/files/" + name})
+	}
+}
+
+// FileDownloadHandler JWT 保护的文件下载（MES 前端展示 PDF/照片）
+func FileDownloadHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		serveUploadFile(w, r, svcCtx.Config.Upload.Dir, r.URL.Query().Get("name"))
+	}
+}
+
+// ListStationsHandler GET /stations
+func ListStationsHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		data, err := logic.New(svcCtx).ListStations(r.Context())
+		if err != nil {
+			httpx.Fail(w, 2205, err.Error())
+			return
+		}
+		httpx.Ok(w, data)
+	}
+}
+
+// SaveStationHandler POST /stations（工位绑定工艺流程图）
+func SaveStationHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		var req logic.StationReq
+		if err := httpx.ParseJSON(r, &req); err != nil {
+			httpx.BadRequest(w, "请求体解析失败")
+			return
+		}
+		if err := logic.New(svcCtx).SaveStation(r.Context(), req, operator(r, "")); err != nil {
+			httpx.Fail(w, 2206, err.Error())
+			return
+		}
+		httpx.OkMessage(w, "工位绑定已保存", nil)
+	}
+}