feat(history): add multi-account and WhatsApp foundation

src/pages/settings/SettingsPage.tsx

@@ -131,7 +131,7 @@ export function SettingsPage() {
               <Field label="当前密码"><Input type="password" value={passwords.currentPassword} onChange={(e) => setPasswords((v) => ({ ...v, currentPassword: e.target.value }))} /></Field>
               <Field label="新密码"><Input type="password" placeholder="至少10位，包含字母和数字" value={passwords.newPassword} onChange={(e) => setPasswords((v) => ({ ...v, newPassword: e.target.value }))} /></Field>
               <Field label="确认新密码"><Input type="password" value={passwords.confirmPassword} onChange={(e) => setPasswords((v) => ({ ...v, confirmPassword: e.target.value }))} /></Field>
-              <div className="rounded bg-emerald-50 p-3 text-sm text-emerald-700"><ShieldCheck className="inline h-4 w-4 mr-1" />密码使用 bcrypt 加密；修改后所有旧登录 Token 会立即失效。</div>
+              <div className="rounded bg-emerald-50 p-3 text-sm text-emerald-700"><ShieldCheck className="inline h-4 w-4 mr-1" />修改密码后，其他已登录设备需要重新登录。</div>
               <Button onClick={async () => {
                 if (passwords.newPassword !== passwords.confirmPassword) return toast.error('两次输入的新密码不一致')
                 try {
@@ -148,7 +148,7 @@ export function SettingsPage() {
           <Card>
             <CardHeader title="API 与 Webhook" />
             <div className="space-y-3 p-4">
-              <p className="text-sm text-muted-foreground">密钥只在创建时完整显示一次，数据库仅保存 SHA-256 摘要。</p>
+              <p className="text-sm text-muted-foreground">密钥只在创建时完整显示一次，请立即复制并妥善保存。</p>
               <div className="flex gap-2">
                 <Input value={apiName} onChange={(e) => setApiName(e.target.value)} placeholder="密钥名称" />
                 <Button variant="outline" onClick={async () => {