diff --git a/web/backend/database.py b/web/backend/database.py
index 8fe8e6d..b9c8f5d 100644
--- a/web/backend/database.py
+++ b/web/backend/database.py
@@ -106,7 +106,12 @@ def run_migrations():
     config = Config(str(PROJECT_ROOT / "alembic.ini"))
     config.set_main_option("script_location", str(PROJECT_ROOT / "web" / "backend" / "migrations"))
     config.set_main_option("sqlalchemy.url", DATABASE_URL)
-    command.upgrade(config, "head")
+    # 标记为应用内嵌调用，env.py 据此跳过 fileConfig，避免覆盖 uvicorn 日志配置。
+    os.environ["ALEMBIC_EMBEDDED"] = "1"
+    try:
+        command.upgrade(config, "head")
+    finally:
+        os.environ.pop("ALEMBIC_EMBEDDED", None)
 
 
 def _seed():
diff --git a/web/backend/migrations/env.py b/web/backend/migrations/env.py
index ea53746..6116008 100644
--- a/web/backend/migrations/env.py
+++ b/web/backend/migrations/env.py
@@ -2,6 +2,7 @@
 
 from logging.config import fileConfig
 from pathlib import Path
+import os
 import sys
 
 from alembic import context
@@ -17,7 +18,10 @@ from web.backend import models  # noqa: F401,E402
 config = context.config
 config.set_main_option("sqlalchemy.url", DATABASE_URL)
 
-if config.config_file_name is not None:
+# 仅在独立运行 alembic CLI 时配置 logging；应用进程内（如 uvicorn 启动调用
+# run_migrations）跳过 fileConfig，避免它覆盖 uvicorn 已配置的日志处理器，
+# 否则会导致 "Application startup complete" 等启动日志无法输出。
+if config.config_file_name is not None and not os.getenv("ALEMBIC_EMBEDDED"):
     fileConfig(config.config_file_name)
 
 target_metadata = Base.metadata
diff --git a/web/backend/routers/cookies.py b/web/backend/routers/cookies.py
index c9643af..aee2a9b 100644
--- a/web/backend/routers/cookies.py
+++ b/web/backend/routers/cookies.py
@@ -133,37 +133,6 @@ def cookies_summary(
     }
 
 
-@router.get("/{task_id}")
-def get_cookie(
-    task_id: int,
-    db: Session = Depends(get_db),
-    current: User = Depends(get_current_user),
-):
-    """获取单条 Cookie 详情，供复制操作按需读取完整敏感字段。"""
-    task = _visible_cookie_tasks_query(db, current).filter(LoginTask.id == task_id).first()
-    if not task:
-        raise HTTPException(status_code=404, detail="记录不存在")
-    acc = db.query(Account).filter(Account.id == task.account_id).first()
-    item = {
-        "id": task.id,
-        "batch_id": task.batch_id,
-        "account_id": task.account_id,
-        "account_username": acc.username if acc else "",
-        "assigned_to": acc.assigned_to if acc else None,
-        "assigned_username": acc.assigned_user.username if acc and acc.assigned_user else None,
-        "created_at": _fmt_dt(task.finished_at),
-        "cookie": "",
-        "cookie_preview": "***",
-        "account_password": "",
-    }
-    if user_has_permission(current, "cookie:view"):
-        cookie = task.cookie or ""
-        item["cookie"] = cookie
-        item["cookie_preview"] = cookie[:50] + "..." if len(cookie) > 50 else cookie
-        item["account_password"] = acc.password if acc else ""
-    return item
-
-
 @router.get("/export")
 def export_cookies(
     format: str = "csv",
@@ -215,6 +184,37 @@ def export_cookies(
     )
 
 
+@router.get("/{task_id}")
+def get_cookie(
+    task_id: int,
+    db: Session = Depends(get_db),
+    current: User = Depends(get_current_user),
+):
+    """获取单条 Cookie 详情，供复制操作按需读取完整敏感字段。"""
+    task = _visible_cookie_tasks_query(db, current).filter(LoginTask.id == task_id).first()
+    if not task:
+        raise HTTPException(status_code=404, detail="记录不存在")
+    acc = db.query(Account).filter(Account.id == task.account_id).first()
+    item = {
+        "id": task.id,
+        "batch_id": task.batch_id,
+        "account_id": task.account_id,
+        "account_username": acc.username if acc else "",
+        "assigned_to": acc.assigned_to if acc else None,
+        "assigned_username": acc.assigned_user.username if acc and acc.assigned_user else None,
+        "created_at": _fmt_dt(task.finished_at),
+        "cookie": "",
+        "cookie_preview": "***",
+        "account_password": "",
+    }
+    if user_has_permission(current, "cookie:view"):
+        cookie = task.cookie or ""
+        item["cookie"] = cookie
+        item["cookie_preview"] = cookie[:50] + "..." if len(cookie) > 50 else cookie
+        item["account_password"] = acc.password if acc else ""
+    return item
+
+
 @router.delete("/batch")
 def delete_cookies_batch(
     task_ids: str = "",
diff --git a/web/frontend/src/api/client.ts b/web/frontend/src/api/client.ts
index 076b0c2..119b5bc 100644
--- a/web/frontend/src/api/client.ts
+++ b/web/frontend/src/api/client.ts
@@ -10,7 +10,9 @@ const api = axios.create({
 api.interceptors.response.use(
   (response) => response.data,
   (error) => {
-    if (error.response?.status === 401) {
+    // 仅在“已登录后 token 失效”时清除登录态并跳转登录页。
+    // 登录接口本身返回 401（用户名/密码错误）时不应跳转，否则会吞掉错误提示。
+    if (error.response?.status === 401 && error.config?.url !== '/auth/login') {
       localStorage.removeItem('user');
       window.location.href = '/login';
     }
diff --git a/web/frontend/src/pages/LoginPage.tsx b/web/frontend/src/pages/LoginPage.tsx
index 81f120d..fe906ad 100644
--- a/web/frontend/src/pages/LoginPage.tsx
+++ b/web/frontend/src/pages/LoginPage.tsx
@@ -1,5 +1,6 @@
-import { useState } from 'react';
+import { useRef, useState } from 'react';
 import { Card, Form, Input, Button, Typography } from 'antd';
+import type { InputRef } from 'antd';
 import { message } from '../utils/antdMessage';
 import { LockOutlined, UserOutlined } from '@ant-design/icons';
 import { useNavigate } from 'react-router-dom';
@@ -13,6 +14,8 @@ const { Title, Text } = Typography;
 
 export default function LoginPage({ onLogin }: { onLogin?: () => void }) {
   const [loading, setLoading] = useState(false);
+  const [form] = Form.useForm();
+  const passwordRef = useRef<InputRef>(null);
   const navigate = useNavigate();
   const { isDark } = useTheme();
   const appInfo = useAppInfo();
@@ -33,7 +36,13 @@ export default function LoginPage({ onLogin }: { onLogin?: () => void }) {
       onLogin?.();       // 触发 App 重渲染
       navigate('/', { replace: true });
     } catch (e: unknown) {
-      message.error(getErrorMessage(e) || '登录失败');
+      const msg = getErrorMessage(e) || '登录失败';
+      message.error(msg);
+      // 密码错误（401）时清空密码并自动聚焦，方便快速重试
+      if (msg.includes('密码') || msg.includes('用户名')) {
+        form.setFieldValue('password', '');
+        passwordRef.current?.focus();
+      }
     } finally {
       setLoading(false);
     }
@@ -62,12 +71,12 @@ export default function LoginPage({ onLogin }: { onLogin?: () => void }) {
         }}>
           当前版本 {versionText}
         </Text>
-        <Form onFinish={onFinish} size="large">
+        <Form form={form} onFinish={onFinish} size="large">
           <Form.Item name="username" rules={[{ required: true, message: '请输入用户名' }]}>
             <Input prefix={<UserOutlined />} placeholder="用户名" />
           </Form.Item>
           <Form.Item name="password" rules={[{ required: true, message: '请输入密码' }]}>
-            <Input.Password prefix={<LockOutlined />} placeholder="密码" />
+            <Input.Password prefix={<LockOutlined />} placeholder="密码" ref={passwordRef} />
           </Form.Item>
           <Form.Item>
             <Button type="primary" htmlType="submit" loading={loading} block>