feat(server): 完成 F15 邮件通知（SMTP/Nodemailer）\n\n- 新增 email 服务（EMAIL_ENABLED + SMTP_* 配置）\n- 待办/审批/付款/密码重置触发可选邮件，失败降级不阻塞\n- 更新 server/README 邮件配置说明，并推进 CSV 状态为 DONE

server/src/routes/reimbursements.js

@@ -8,6 +8,7 @@ const {
   createNotifications,
   resolveRecipientsForAssignee,
 } = require("../services/notifications");
+const { sendNotificationEmailSafe } = require("../services/email");
 const {
   buildWorkflowStepsFromApprovalRule,
   resolveActionableStep,
@@ -1141,6 +1142,7 @@ async function reimbursementRoutes(fastify) {
     async (request, reply) => {
       const reimbursementId = parseReimbursementId(request.params?.id);
       let submitResult = null;
+      const emailTasks = [];
 
       await fastify.prisma.$transaction(async (tx) => {
         const reimbursementRows = await tx.$queryRaw`
@@ -1365,6 +1367,14 @@ async function reimbursementRoutes(fastify) {
             targetType: "workflow_task",
             targetId: workflowTask.id,
           });
+
+          emailTasks.push({
+            type: "workflow.task_assigned",
+            recipientEmployeeIds: recipients,
+            subject: `【待办】报销单 ${formNumber} 待审批`,
+            body: `报销单 ${formNumber} 已提交，请及时处理。`,
+            targetPath: `/workflow/tasks/${workflowTask.id}`,
+          });
         } catch (error) {
           fastify.log.error(
             { err: error, reimbursementId, taskId: workflowTask.id },
@@ -1397,6 +1407,16 @@ async function reimbursementRoutes(fastify) {
         };
       });
 
+      for (const task of emailTasks) {
+        void sendNotificationEmailSafe({
+          prisma: fastify.prisma,
+          config: fastify.config,
+          logger: fastify.log,
+          requestId: request.id,
+          ...task,
+        });
+      }
+
       return sendData(reply, request, submitResult);
     },
   );
@@ -1546,6 +1566,7 @@ async function reimbursementRoutes(fastify) {
       const reimbursementId = parseReimbursementId(request.params?.id);
       const payInput = parsePayBody(request.body);
       let response = null;
+      const emailTasks = [];
 
       await fastify.prisma.$transaction(async (tx) => {
         const reimbursementRows = await tx.$queryRaw`
@@ -1635,6 +1656,14 @@ async function reimbursementRoutes(fastify) {
               targetType: "reimbursement_form",
               targetId: reimbursementId,
             });
+
+            emailTasks.push({
+              type: "reimbursement.paid",
+              recipientEmployeeIds: recipients,
+              subject: `【已付款】报销单 ${reimbursement.form_number ?? reimbursementId}`,
+              body: `报销单 ${reimbursement.form_number ?? reimbursementId} 已完成付款。`,
+              targetPath: `/reimbursements/${reimbursementId}`,
+            });
           } catch (error) {
             fastify.log.error(
               { err: error, reimbursementId },
@@ -1675,6 +1704,16 @@ async function reimbursementRoutes(fastify) {
         };
       });
 
+      for (const task of emailTasks) {
+        void sendNotificationEmailSafe({
+          prisma: fastify.prisma,
+          config: fastify.config,
+          logger: fastify.log,
+          requestId: request.id,
+          ...task,
+        });
+      }
+
       return sendData(reply, request, response);
     },
   );