diff --git a/client/README.md b/client/README.md
index 6dccfb81..23092e26 100644
--- a/client/README.md
+++ b/client/README.md
@@ -34,6 +34,20 @@ npm run dev
 - 前端在 401 时自动调用 `/api/auth/refresh` 并重试一次请求。
 - 登录与刷新请求都会附带 `x-device-fingerprint`。
 
+## 4.1 开发环境默认账号（seed:dev）
+仅用于本地联调（`cd server && npm run seed:dev`）：
+
+| 角色 | 账号 | 密码 |
+|---|---|---|
+| employee | `employee@hyinda.com` | `EmployeePassword1234` |
+| manager | `manager@hyinda.com` | `ManagerPassword1234` |
+| finance | `finance@hyinda.com` | `FinancePassword1234` |
+| finance_mgr | `finance_mgr@hyinda.com` | `FinanceMgrPassword1234` |
+| admin | `admin@hyinda.com` | `AdminPassword1234` |
+| ceo | `ceo@hyinda.com` | `CeoPassword1234` |
+
+忘记密码：试运行/生产建议采用“管理员重置密码”策略。
+
 ## 5. 菜单与权限（当前壳层）
 - 仪表盘：登录即可访问。
 - 我的报销：`expense.view_own` 或 `expense.view_all`。
diff --git a/client/src/api/errorMessages.ts b/client/src/api/errorMessages.ts
index 4abdfd10..c678279d 100644
--- a/client/src/api/errorMessages.ts
+++ b/client/src/api/errorMessages.ts
@@ -7,6 +7,10 @@ export function mapApiErrorMessage(
     return "账号或密码错误，请检查后重试。";
   }
 
+  if (code === "AUTH_003") {
+    return "账号已离职/禁用，请联系管理员。";
+  }
+
   if (code === "AUTH_004") {
     return "登录状态失效，请重新登录。";
   }
@@ -23,6 +27,10 @@ export function mapApiErrorMessage(
     return "目标数据不存在或已被删除。";
   }
 
+  if (code === "SYS_001") {
+    return "服务暂不可用，请稍后重试或联系管理员。";
+  }
+
   if (code === "VALID_002") {
     return "输入内容长度不足，请补充后再提交。";
   }
@@ -59,4 +67,3 @@ export function mapApiErrorMessage(
 
   return fallbackMessage || "请求失败，请稍后重试。";
 }
-
diff --git a/client/src/pages/LoginPage.tsx b/client/src/pages/LoginPage.tsx
index 75b45ccd..4e072b2c 100644
--- a/client/src/pages/LoginPage.tsx
+++ b/client/src/pages/LoginPage.tsx
@@ -1,7 +1,12 @@
 import { useState } from "react";
 import { useNavigate, useSearchParams } from "react-router-dom";
+import { mapApiErrorMessage } from "../api/errorMessages";
 import { isApiError } from "../api/types";
 import { useAuth } from "../auth/AuthContext";
+import { Button } from "../components/ui/button";
+import { Card } from "../components/ui/card";
+import { Input } from "../components/ui/input";
+import { Label } from "../components/ui/label";
 
 function resolveRedirect(searchParams: URLSearchParams) {
   const redirect = searchParams.get("redirect");
@@ -38,7 +43,9 @@ export function LoginPage() {
       navigate(redirectTo, { replace: true });
     } catch (err) {
       if (isApiError(err)) {
-        setError(`${err.code}: ${err.message}`);
+        setError(`${err.code}: ${mapApiErrorMessage(err.code, err.details, err.message)}`);
+      } else if (err instanceof TypeError) {
+        setError("无法连接后端服务，请确认 server 已启动（http://127.0.0.1:3000）。");
       } else {
         setError("登录失败，请稍后重试");
       }
@@ -48,49 +55,53 @@ export function LoginPage() {
   }
 
   return (
-    <div className="card-std border-primary-100">
+    <Card className="space-y-6 border-primary-100 p-6">
       <div className="mb-6">
         <p className="text-xs font-semibold uppercase tracking-wide text-primary">hyb-oa</p>
         <h1 className="mt-2 text-2xl font-bold text-slate-900">登录工作台</h1>
         <p className="mt-2 text-sm text-secondary">使用邮箱/手机号与密码登录。</p>
+        <p className="mt-1 text-xs text-slate-500">忘记密码：请联系管理员重置。</p>
       </div>
 
       <form className="space-y-4" onSubmit={handleSubmit}>
-        <label className="block text-sm font-medium text-slate-700" htmlFor="identifier">
-          账号
-          <input
+        <div className="space-y-1">
+          <Label htmlFor="identifier">账号</Label>
+          <Input
             autoComplete="username"
-            className="mt-1 w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm focus:border-primary-400 focus:outline-none focus:ring-2 focus:ring-primary-100"
+            data-testid="login-identifier"
             id="identifier"
             onChange={(event) => setIdentifier(event.target.value)}
             placeholder="邮箱或手机号"
             value={identifier}
           />
-        </label>
+        </div>
 
-        <label className="block text-sm font-medium text-slate-700" htmlFor="password">
-          密码
-          <input
+        <div className="space-y-1">
+          <Label htmlFor="password">密码</Label>
+          <Input
             autoComplete="current-password"
-            className="mt-1 w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm focus:border-primary-400 focus:outline-none focus:ring-2 focus:ring-primary-100"
+            data-testid="login-password"
             id="password"
             onChange={(event) => setPassword(event.target.value)}
             placeholder="请输入密码"
             type="password"
             value={password}
           />
-        </label>
+        </div>
 
         {error ? (
-          <p className="rounded-lg border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-600">
+          <p
+            className="rounded-lg border border-red-200 bg-red-50 px-3 py-2 text-sm text-red-600"
+            data-testid="login-error"
+          >
             {error}
           </p>
         ) : null}
 
-        <button className="btn-primary w-full" disabled={submitting} type="submit">
+        <Button data-testid="login-submit" className="w-full" disabled={submitting} type="submit">
           {submitting ? "登录中..." : "登录"}
-        </button>
+        </Button>
       </form>
-    </div>
+    </Card>
   );
 }
diff --git a/issues/2026-02-08_21-50-09-p4-trialrun-ready.csv b/issues/2026-02-08_21-50-09-p4-trialrun-ready.csv
index 537bfa34..bb688abb 100644
--- a/issues/2026-02-08_21-50-09-p4-trialrun-ready.csv
+++ b/issues/2026-02-08_21-50-09-p4-trialrun-ready.csv
@@ -6,7 +6,7 @@ E4,待办页精修（列表详情动作）,用UI primitives收敛待办列表与
 E5,报销页精修（列表详情联动）,收敛报销列表详情展示并优化支付凭证与票据区块一致性并补data-testid,employee可create submit withdraw且finance可pay并填写凭证字段,cd client && npm run typecheck && npm run build,manual,DONE,DONE,DONE,client/src/pages/ReimbursementsPage.tsx | client/src/pages/ReimbursementDetailPage.tsx | client/src/api/reimbursements.ts,"[""E3""]",为E2E补稳定选择器data-testid
 E6,票据中心精修（OCR与预览）,收敛上传列表详情并强化OCR状态展示绑定与签名预览交互并补data-testid,OCR_PROVIDER=mock联调可轮询pending_ocr且ocr_failed展示原因且预览可用,cd client && npm run typecheck && npm run build,manual,DONE,DONE,DONE,client/src/pages/InvoicePoolPage.tsx | client/src/api/invoicePool.ts | client/src/api/http.ts,"[""E3""]",为E2E补稳定选择器data-testid
 E7,委派管理前端页（运营可用）,新增委派管理页与API封装支持创建列表撤销并加菜单入口与守卫,可创建委派撤销后delegate不可代办且无权限用户403提示正确,"manual: manager创建委派让delegate代办一次后撤销再验证PERM_002",manual,DONE,TODO,TODO,client/src/pages/DelegationsPage.tsx | client/src/api/delegations.ts | client/src/router/index.tsx | client/src/components/navigation/Sidebar.tsx,"[""E3""]",权限码沿用expense.proxy_manage
-E8,默认账号与失败体验收敛,补dev seed默认账号文档并让前端对网络失败给出可操作提示（含“忘记密码请联系管理员重置”）,登录页后端不可达提示服务未启动且README列出默认账号且SYS_001提示可读,"manual: 停后端访问登录页看到提示并按README默认账号登录成功",manual,TODO,TODO,TODO,client/src/pages/LoginPage.tsx | client/src/api/errorMessages.ts | server/README.md | client/README.md,"[""E1""]",仅写dev seed账号不写生产密码与密钥
+E8,默认账号与失败体验收敛,补dev seed默认账号文档并让前端对网络失败给出可操作提示（含“忘记密码请联系管理员重置”）,登录页后端不可达提示服务未启动且README列出默认账号且SYS_001提示可读,"manual: 停后端访问登录页看到提示并按README默认账号登录成功",manual,DONE,TODO,TODO,client/src/pages/LoginPage.tsx | client/src/api/errorMessages.ts | server/README.md | client/README.md,"[""E1""]",仅写dev seed账号不写生产密码与密钥
 E9,DB索引补强（试运行性能）,为列表分页与筛选补组合索引以降低试运行慢查询风险,迁移可重复执行且回归全绿,cd server && npm run prisma:migrate:deploy && ./scripts/regression-all.sh,manual,TODO,TODO,TODO,server/prisma/schema.prisma | server/prisma/migrations/*,"[""E1""]",新增组合索引仅增不破回滚成本低
 E10,后端安全基线（上线级）,增加安全头与关键接口限流并完善上传校验与日志脱敏约定,限流触发行为正确安全头存在上传非法类型被拒绝且不泄露token,"manual: curl压测login并验证429与headers并做一次上传非法类型校验",manual,TODO,TODO,TODO,server/src/app.js | server/src/config.js | server/src/routes/auth.js | server/src/routes/invoicePool.js | server/README.md | server/package.json,"[""E1""]",优先使用@fastify/helmet与@fastify/rate-limit并写回滚说明
 E11,可观测性基线（ready与作业统计）,新增/ready进行DB探活并为OCR与委派回收作业输出结构化统计,ready可反映db状态且作业日志输出claimed updated audited等计数便于排障,"manual: 启动服务curl /ready并触发一次job观察日志字段",manual,TODO,TODO,TODO,server/src/app.js | server/src/jobs/delegationRevokeJob.js | server/src/jobs/ocrJob.js | server/README.md,"[""E10""]",不引入外部监控先提供最小可观测字段
diff --git a/server/README.md b/server/README.md
index 989d73cf..e40b5e27 100644
--- a/server/README.md
+++ b/server/README.md
@@ -31,6 +31,18 @@ cd /home/shunli/Projects/hyb-oa/server
 npm run seed:dev
 ```
 
+开发环境默认账号（仅用于本地 seed:dev）：
+- employee：`employee@hyinda.com` / `EmployeePassword1234`
+- manager：`manager@hyinda.com` / `ManagerPassword1234`
+- finance：`finance@hyinda.com` / `FinancePassword1234`
+- finance_mgr：`finance_mgr@hyinda.com` / `FinanceMgrPassword1234`
+- admin：`admin@hyinda.com` / `AdminPassword1234`
+- ceo：`ceo@hyinda.com` / `CeoPassword1234`
+
+说明：
+- 以上账号可通过 `SEED_*` 环境变量覆盖（见 `server/src/scripts/seed-dev.js`）。
+- 生产/试运行环境默认采用“管理员重置密码”，不建议启用默认弱口令。
+
 ### 2.4 启动服务
 ```bash
 cd /home/shunli/Projects/hyb-oa/server