优化: 大文件拆分+代码分割+按需加载+console清理+any类型替换

- Money.tsx (2260行→54行): 拆分为 money/ 子目录4个组件, React.lazy二级分割
- AIAssistant.tsx (2038行→63行): 拆分为 ai-assistant/ 子目录6个组件, React.lazy二级分割
- xlsx改为动态导入, OvertimeTab从345KB降至12.7KB
- api-services.ts: 请求参数 any→Record<string,unknown>
- 移除前端3处console.log残留
- 后端console替换为pino logger
- 前后端未使用import/变量清理
- Zod schema验证: termination/platform/special-status/work-process
- 新增 leave.routes.ts, acceptance-test.routes.ts
- UI组件: PageGuide, QueryError, Stepper

backend/prisma/migration_add_acceptance_test.sql

@@ -0,0 +1,27 @@
+-- 验收测试表
+CREATE TABLE IF NOT EXISTS "AcceptanceTest" (
+    "id"              TEXT NOT NULL,
+    "orgId"           TEXT NOT NULL,
+    "verifierName"    TEXT NOT NULL,
+    "results"         JSONB NOT NULL,
+    "remarks"         JSONB NOT NULL,
+    "conclusionName"  TEXT,
+    "conclusionDate"  TEXT,
+    "conclusionResult" TEXT,
+    "conclusionIssues" TEXT,
+    "screenshots"      JSONB,
+    "signature1"       TEXT,
+    "signature2"       TEXT,
+    "status"          TEXT NOT NULL DEFAULT 'DRAFT',
+    "submittedAt"     TIMESTAMP(3),
+    "createdBy"       TEXT NOT NULL,
+    "createdAt"       TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updatedAt"       TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT "AcceptanceTest_pkey" PRIMARY KEY ("id")
+);
+
+-- 唯一约束：同一组织下验收人姓名唯一
+CREATE UNIQUE INDEX IF NOT EXISTS "AcceptanceTest_orgId_verifierName_key" ON "AcceptanceTest"("orgId", "verifierName");
+
+-- 索引
+CREATE INDEX IF NOT EXISTS "AcceptanceTest_orgId_status_idx" ON "AcceptanceTest"("orgId", "status");