实现报销费用政策与票据明细门禁（08-29-reimbursement-expense-policy-invoice-guard）

server/src/routes/invoicePool.js

@@ -20,6 +20,7 @@ const { registerInvoicePoolReadRoutes } = require("./invoicePool/read");
 const { normalizeInvoiceResponse } = require("./invoicePool/shared/mappers");
 const { buildInvoiceDetailSelect } = require("./invoicePool/shared/selects");
 const { writeBuffer } = require("../services/storage");
+const { FEATURE_FLAG_KEYS, evaluateFeatureFlag } = require("../services/featureFlags");
 const {
   mapInvoiceUnavailableReason,
   resolveInvoiceAvailability,
@@ -1573,7 +1574,7 @@ async function invoicePoolRoutes(fastify) {
 
             const { reimbursementId, linkedItemId } = parsedBody.data;
             const reimbursementRows = await tx.$queryRaw`
-              SELECT id, owner_id, submitter_id, status, reimbursement_date
+              SELECT id, owner_id, submitter_id, department_id, status, reimbursement_date
               FROM "reimbursement_forms"
               WHERE id = ${reimbursementId}::uuid
               FOR UPDATE
@@ -1616,6 +1617,22 @@ async function invoicePoolRoutes(fastify) {
               });
             }
 
+            const invoiceGuardGate = await evaluateFeatureFlag({
+              prisma: tx,
+              config: fastify.config,
+              flagKey: FEATURE_FLAG_KEYS.reimbursementInvoiceGuard,
+              departmentId: reimbursement.department_id ?? null,
+              strictDepartment: true,
+            });
+            if (invoiceGuardGate.enabled && !linkedItemId) {
+              throw new AppError({
+                code: "VALID_001",
+                message: "参数校验失败",
+                statusCode: 400,
+                details: { linkedItemId: "required_when_invoice_guard_enabled" },
+              });
+            }
+
             const resolvedLink = await resolveInvoiceLinkedItem(tx, {
               reimbursementId,
               reimbursementDate: reimbursement.reimbursement_date,