fix: 自动恢复失效令牌并保留身份入口

src/components/xingbang/AgentNav.tsx

@@ -24,7 +24,14 @@ export default function AgentNav({active,project,identity:provided}:{active:stri
   useEffect(()=>{
     setRoleHint(sessionStorage.getItem("xingbang-demo-role")||"");
     if(provided)return;
-    fetch("/api/risk-agent/access/context",{headers:identityHeaders()}).then(async r=>r.ok?setLoaded(await r.json()):null).catch(()=>null);
+    fetch("/api/risk-agent/access/context",{headers:identityHeaders()}).then(async response=>{
+      if(response.ok){setLoaded(await response.json());return;}
+      if(response.status===401&&sessionStorage.getItem("xingbang-access-token")&&!sessionStorage.getItem("xingbang-demo-role")){
+        sessionStorage.removeItem("xingbang-access-token");
+        sessionStorage.setItem("xingbang-demo-role","manager");
+        location.reload();
+      }
+    }).catch(()=>null);
   },[provided]);
   const identity=provided||loaded;
   const role=identity?.role||roleHint;
@@ -42,6 +49,6 @@ export default function AgentNav({active,project,identity:provided}:{active:stri
     {canConfigure&&<a href="/data-access" className={active==="risk"?"selected":""}><Settings2 size={16}/>配置治理</a>}
     <span className="xb-nav-spacer"/>
     {project&&<span className="xb-project-context">项目 · {project}</span>}
-    {identity?<IdentitySelector identity={identity}/>:<span className="xb-identity"><i/><span>当前身份</span><b>待连接</b></span>}
+    <IdentitySelector identity={identity||{role:roleHint}} pending={!identity}/>
   </nav>;
 }

src/components/xingbang/IdentitySelector.tsx

@@ -4,8 +4,8 @@ import {ShieldCheck} from "lucide-react";
 
 export const ROLE_LABEL:Record<string,string>={manager:"客户经理",reviewer:"评审员",admin:"配置管理员"};
 
-export default function IdentitySelector({identity,dark=false}:{identity:any;dark?:boolean}){
-  const role=identity?.role||"manager";
+export default function IdentitySelector({identity,dark=false,pending=false}:{identity:any;dark?:boolean;pending?:boolean}){
+  const role=identity?.role||(pending?"":"manager");
   function switchRole(next:string){
     sessionStorage.removeItem("xingbang-access-token");
     sessionStorage.setItem("xingbang-demo-role",next);
@@ -14,6 +14,7 @@ export default function IdentitySelector({identity,dark=false}:{identity:any;dar
   return <label className={`xb-role-switch role-${role}${dark?" dark":""}`}>
     <span>当前身份</span><ShieldCheck size={16}/>
     <select aria-label="切换演示身份" value={role} onChange={event=>switchRole(event.target.value)}>
+      {pending&&<option value="" disabled>选择身份</option>}
       <option value="manager">客户经理</option><option value="reviewer">评审员</option><option value="admin">配置管理员</option>
     </select>
   </label>;