R47 A1-A8：完成薪资管理模块

server/prisma/migrations/20260330010000_r47_payroll/migration.sql

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+-- CreateEnum
+CREATE TYPE "SalaryItemType" AS ENUM ('earning', 'deduction');
+
+-- CreateEnum
+CREATE TYPE "PayslipStatus" AS ENUM ('draft', 'issued');
+
+-- CreateTable
+CREATE TABLE "salary_items" (
+    "id" UUID NOT NULL,
+    "name" TEXT NOT NULL,
+    "item_type" "SalaryItemType" NOT NULL,
+    "sort_order" INTEGER NOT NULL,
+    "enabled" BOOLEAN NOT NULL DEFAULT true,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "created_by" UUID,
+    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_by" UUID,
+
+    CONSTRAINT "salary_items_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "employee_salaries" (
+    "id" UUID NOT NULL,
+    "employee_id" UUID NOT NULL,
+    "salary_item_id" UUID NOT NULL,
+    "monthly_amount" DECIMAL(12,2) NOT NULL,
+    "effective_date" DATE NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "created_by" UUID,
+    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_by" UUID,
+
+    CONSTRAINT "employee_salaries_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "payslips" (
+    "id" UUID NOT NULL,
+    "employee_id" UUID NOT NULL,
+    "pay_month" DATE NOT NULL,
+    "status" "PayslipStatus" NOT NULL DEFAULT 'draft',
+    "gross_amount" DECIMAL(12,2) NOT NULL DEFAULT 0,
+    "deduction_amount" DECIMAL(12,2) NOT NULL DEFAULT 0,
+    "net_amount" DECIMAL(12,2) NOT NULL DEFAULT 0,
+    "issued_at" TIMESTAMP(3),
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "created_by" UUID,
+    "updated_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_by" UUID,
+
+    CONSTRAINT "payslips_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "payslip_items" (
+    "id" UUID NOT NULL,
+    "payslip_id" UUID NOT NULL,
+    "salary_item_id" UUID NOT NULL,
+    "amount" DECIMAL(12,2) NOT NULL DEFAULT 0,
+
+    CONSTRAINT "payslip_items_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "salary_items_name_key" ON "salary_items"("name");
+
+-- CreateIndex
+CREATE INDEX "idx_salary_items_enabled_sort" ON "salary_items"("enabled", "sort_order");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "employee_salaries_employee_item_effective_ux" ON "employee_salaries"("employee_id", "salary_item_id", "effective_date");
+
+-- CreateIndex
+CREATE INDEX "idx_employee_salaries_employee_effective" ON "employee_salaries"("employee_id", "effective_date");
+
+-- CreateIndex
+CREATE INDEX "idx_employee_salaries_salary_item" ON "employee_salaries"("salary_item_id");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "payslips_employee_month_ux" ON "payslips"("employee_id", "pay_month");
+
+-- CreateIndex
+CREATE INDEX "idx_payslips_month_status" ON "payslips"("pay_month", "status");
+
+-- CreateIndex
+CREATE INDEX "idx_payslips_employee_month" ON "payslips"("employee_id", "pay_month");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "payslip_items_payslip_salary_item_ux" ON "payslip_items"("payslip_id", "salary_item_id");
+
+-- CreateIndex
+CREATE INDEX "idx_payslip_items_salary_item" ON "payslip_items"("salary_item_id");
+
+-- AddForeignKey
+ALTER TABLE "employee_salaries" ADD CONSTRAINT "employee_salaries_employee_id_fkey" FOREIGN KEY ("employee_id") REFERENCES "employees"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "employee_salaries" ADD CONSTRAINT "employee_salaries_salary_item_id_fkey" FOREIGN KEY ("salary_item_id") REFERENCES "salary_items"("id") ON DELETE RESTRICT ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "payslips" ADD CONSTRAINT "payslips_employee_id_fkey" FOREIGN KEY ("employee_id") REFERENCES "employees"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "payslip_items" ADD CONSTRAINT "payslip_items_payslip_id_fkey" FOREIGN KEY ("payslip_id") REFERENCES "payslips"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "payslip_items" ADD CONSTRAINT "payslip_items_salary_item_id_fkey" FOREIGN KEY ("salary_item_id") REFERENCES "salary_items"("id") ON DELETE RESTRICT ON UPDATE CASCADE;