addition expense claims

backend/prisma/migrations/20260420110000_add_expense_claims/migration.sql

@@ -0,0 +1,26 @@
+CREATE TABLE "expense_claims" (
+    "id" TEXT NOT NULL,
+    "employeeId" TEXT NOT NULL,
+    "claimNumber" TEXT NOT NULL,
+    "expenseDate" DATE,
+    "amount" DECIMAL(12,2),
+    "description" TEXT,
+    "projectOrTender" TEXT,
+    "status" TEXT NOT NULL DEFAULT 'PENDING',
+    "approvedBy" TEXT,
+    "approvedAt" TIMESTAMP(3),
+    "rejectedReason" TEXT,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "expense_claims_pkey" PRIMARY KEY ("id")
+);
+
+CREATE UNIQUE INDEX "expense_claims_claimNumber_key" ON "expense_claims"("claimNumber");
+CREATE INDEX "expense_claims_employeeId_idx" ON "expense_claims"("employeeId");
+CREATE INDEX "expense_claims_status_idx" ON "expense_claims"("status");
+
+ALTER TABLE "expense_claims"
+ADD CONSTRAINT "expense_claims_employeeId_fkey"
+FOREIGN KEY ("employeeId") REFERENCES "employees"("id")
+ON DELETE RESTRICT ON UPDATE CASCADE;

backend/prisma/migrations/20260420150000_add_expense_claim_items/migration.sql

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+ALTER TABLE "expense_claims"
+ADD COLUMN "items" JSONB;
+
+ALTER TABLE "expense_claims"
+ADD COLUMN "totalAmount" DECIMAL(12,2);
+
+UPDATE "expense_claims"
+SET "totalAmount" = "amount"
+WHERE "totalAmount" IS NULL AND "amount" IS NOT NULL;