feat(client): 用户管理页 + E2E 门禁（E15/E16/E18）

- 新增系统用户管理页（创建/禁用启用/重置密码/角色）

- 引入 Playwright E2E：覆盖登录-报销-待办-票据-OCR-支付-登出

- 新增 ci-e2e 工作流（PR + nightly）

client/playwright.config.ts

@@ -0,0 +1,21 @@
+import { defineConfig } from "@playwright/test";
+
+const baseURL = process.env.E2E_BASE_URL ?? "http://127.0.0.1:3000";
+
+export default defineConfig({
+  testDir: "./tests/e2e",
+  timeout: 120_000,
+  expect: {
+    timeout: 30_000,
+  },
+  retries: process.env.CI ? 1 : 0,
+  use: {
+    baseURL,
+    headless: true,
+    trace: "on-first-retry",
+    screenshot: "only-on-failure",
+    video: "retain-on-failure",
+  },
+  reporter: process.env.CI ? [["github"], ["html", { open: "never" }]] : [["list"], ["html"]],
+});
+