fix(brain-repo): /onboarding?reconfigure=brain enters connect step directly after onboarding completion

The "Configure" / "Reconnect" buttons on /backups and /settings/brain-repo linked to /onboarding, which the OnboardingRouter bounces straight to /agents when onboarding_state is completed or skipped — leaving users with no UI path to connect the brain repo after initial setup.

Add a "reconfigure=brain" query param that skips the welcome screen and the provider step and drops the user directly into StepBrainConnect, and point all three call sites at it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: DavidsonGomes

dashboard/frontend/src/pages/Backups.tsx

@@ -468,7 +468,7 @@ function DestinationsPanel({
               </Link>
               {(cryptoBroken || brain?.last_error) && (
                 <Link
-                  to="/onboarding"
+                  to="/onboarding?reconfigure=brain"
                   className={`${pillBtn} bg-[#f87171]/10 text-[#f87171] border border-[#3a1515] hover:bg-[#f87171]/20`}
                 >
                   {t('backups.destinations.reconnect')}
@@ -479,7 +479,7 @@ function DestinationsPanel({
         ) : (
           <div className="mt-1">
             <Link
-              to="/onboarding"
+              to="/onboarding?reconfigure=brain"
               className={`${pillBtn} bg-[#00FFA7]/10 text-[#00FFA7] border border-[#00FFA7]/20 hover:bg-[#00FFA7]/20`}
             >
               {t('backups.destinations.configure')}
@@ -1275,7 +1275,7 @@ export default function Backups() {
               <p className="text-sm text-[#8a9aae]">{t('backups.brainTab.notConnectedTitle')}</p>
               <p className="text-xs mt-1">{t('backups.brainTab.notConnectedHint')}</p>
               <Link
-                to="/onboarding"
+                to="/onboarding?reconfigure=brain"
                 className="mt-4 px-4 py-2 rounded-lg bg-[#00FFA7]/10 text-[#00FFA7] border border-[#00FFA7]/20 hover:bg-[#00FFA7]/20 text-sm font-medium transition-colors"
               >{t('backups.destinations.configure')}</Link>
             </div>

dashboard/frontend/src/pages/onboarding/OnboardingRouter.tsx

@@ -32,8 +32,21 @@ export default function OnboardingRouter() {
   const [loading, setLoading] = useState(true)
 
   useEffect(() => {
+    // Allow re-entry into a specific sub-flow even after onboarding is completed.
+    // "?reconfigure=brain" enters the brain-repo connect step directly — used by the
+    // "Configure" buttons on /backups and /settings/brain-repo when the user already
+    // completed onboarding but never connected a brain repo (or disconnected it).
+    const params = new URLSearchParams(window.location.search)
+    const reconfigure = params.get('reconfigure')
+
     api.get('/onboarding/state')
       .then((data: OnboardingState) => {
+        if (reconfigure === 'brain') {
+          setFlow('first-time')
+          setWantBrainRepo(true)
+          setStep(3)
+          return
+        }
         // If already completed or skipped, go to agents
         if (data.onboarding_state === 'completed' || data.onboarding_state === 'skipped') {
           navigate('/agents', { replace: true })

dashboard/frontend/src/pages/settings/BrainRepo.tsx

@@ -298,7 +298,7 @@ export default function BrainRepo() {
             {t('brainRepoSettings.empty.desc')}
           </p>
           <a
-            href="/onboarding"
+            href="/onboarding?reconfigure=brain"
             className="inline-block mt-4 px-4 py-2 rounded-lg bg-[#00FFA7] text-[#080c14] hover:bg-[#00e69a] text-sm font-semibold transition-colors"
           >
             {t('brainRepoSettings.empty.btn')}