去除 access_token 访问写库逻辑

frontend/components/common/docs/api.tsx

@@ -205,7 +205,6 @@ export const apiSections: PolicySection[] = [
       "name": "my-dev-key",
       "masked_token": "at_628d...29c9",
       "is_admin": false,
-      "last_used_at": null,
       "created_at": "2026-06-07T21:30:00+08:00"
     }
   }
@@ -219,7 +218,7 @@ export const apiSections: PolicySection[] = [
 
         <h3 id="3-4-rotate-token" className="text-base md:text-lg font-semibold text-foreground mt-6 mb-2">3.4 轮换令牌密钥</h3>
         <p><strong>接口：</strong>POST <code className="bg-muted px-1.5 py-0.5 rounded text-xs font-mono">/api/v1/user/access-tokens/:id/rotate</code></p>
-        <p><strong>说明：</strong>轮换指定令牌的物理密钥值。系统将废弃原有密钥，返回新生成的明文 Token，并将 `last_used_at` 置空，令牌名称与 ID 保持一致。</p>
+        <p><strong>说明：</strong>轮换指定令牌的物理密钥值。系统将废弃原有密钥，返回新生成的明文 Token，令牌名称与 ID 保持一致。</p>
       </div>
     ),
     children: [

frontend/components/common/settings/access-token.tsx

@@ -206,11 +206,15 @@ export function AccessTokenMain() {
                   <div className="space-y-1">
                     <div className="flex items-center gap-2">
                       <span className="font-semibold text-sm text-foreground">{token.name}</span>
-                      {token.is_admin && (
+                      {token.is_admin ? (
                         <Badge variant="outline" className="text-[10px] px-1.5 py-0 h-4 border-rose-500/40 text-rose-500 bg-rose-500/5 font-semibold">
                           <Shield className="size-2.5 mr-0.5" />
                           管理员
                         </Badge>
+                      ) : (
+                        <Badge variant="outline" className="text-[10px] px-1.5 py-0 h-4 border-border/50 text-muted-foreground bg-muted/10 font-semibold">
+                          用户令牌
+                        </Badge>
                       )}
                     </div>
                     <div className="flex flex-col gap-1 text-xs text-muted-foreground">
@@ -219,7 +223,6 @@ export function AccessTokenMain() {
                       </div>
                       <div className="flex flex-wrap gap-x-4 gap-y-0.5 pt-1">
                         <span>创建于: {formatDate(token.created_at)}</span>
-                        <span>最后使用: {formatDate(token.last_used_at)}</span>
                       </div>
                     </div>
                   </div>

frontend/lib/services/user/user.service.ts

@@ -6,7 +6,6 @@ export interface AccessToken {
   name: string;
   masked_token: string;
   is_admin: boolean;
-  last_used_at?: string;
   created_at: string;
   updated_at: string;
 }