实现报销材料合并预览与差旅概要（07-27-yang-jun-reimbursement-readiness）

server/prisma/migrations/20260801120000_reimbursement_travel_summary/migration.sql

@@ -0,0 +1,5 @@
+ALTER TABLE "reimbursement_forms"
+ADD COLUMN "travel_purpose" VARCHAR(200),
+ADD COLUMN "travel_location" VARCHAR(200),
+ADD COLUMN "travel_start_date" DATE,
+ADD COLUMN "travel_end_date" DATE;