fix: clean up runtime UI and harden session expiry handling

Remove redundant "X/X LIVE" badge from runtime page, breadcrumb trail
and routes section from agent detail page (pills moved into Process
Information card). Fix session expiry: guard against concurrent 401
refresh races and skip re-entrant triggers on auth endpoints.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/auth/use-auth.ts

@@ -1,4 +1,4 @@
-import { useEffect } from 'react';
+import { useEffect, useRef } from 'react';
 import { useAuthStore } from './auth-store';
 import { configureAuth } from '../api/client';
 import { useNavigate } from 'react-router';
@@ -6,14 +6,21 @@ import { useNavigate } from 'react-router';
 export function useAuth() {
   const { accessToken, isAuthenticated, refresh, logout } = useAuthStore();
   const navigate = useNavigate();
+  const refreshingRef = useRef(false);
 
   useEffect(() => {
     configureAuth({
       onUnauthorized: async () => {
-        const ok = await useAuthStore.getState().refresh();
-        if (!ok) {
-          useAuthStore.getState().logout();
-          navigate('/login', { replace: true });
+        if (refreshingRef.current) return;
+        refreshingRef.current = true;
+        try {
+          const ok = await useAuthStore.getState().refresh();
+          if (!ok) {
+            useAuthStore.getState().logout();
+            navigate('/login', { replace: true });
+          }
+        } finally {
+          refreshingRef.current = false;
         }
       },
     });