Fix: remove Anthropic from onboarding, require 3/3 credentials

nexus/client/src/components/onboarding-modal.tsx

@@ -43,11 +43,11 @@ export default function OnboardingModal() {
 
   // Count configured settings
   const configured = settings?.filter(s =>
-    ["ANTHROPIC_API_KEY", "HF_TOKEN", "KAGGLE_KEY", "SUPABASE_ANON_KEY"].includes(s.key) && s.configured
+    ["HF_TOKEN", "KAGGLE_KEY", "SUPABASE_ANON_KEY"].includes(s.key) && s.configured
   ).length || 0;
 
   const okCountFromState = Object.values(stepStatus).filter(s => s === "ok").length;
-  const allConfigured = configured >= 4 || okCountFromState >= 4;
+  const allConfigured = configured >= 3 || okCountFromState >= 3;
   const open = !allConfigured && !dismissed;
 
   const setValue = (key: string, value: string) => {
@@ -189,7 +189,7 @@ export default function OnboardingModal() {
           })}
         </div>
 
-        {okCount >= 4 && (
+        {okCount >= 3 && (
           <Button
             className="w-full bg-indigo-600 hover:bg-indigo-700 text-white"
             onClick={() => setDismissed(true)}
@@ -198,9 +198,9 @@ export default function OnboardingModal() {
             Launch NEXUS
           </Button>
         )}
-        {okCount < 4 && (
+        {okCount < 3 && (
           <div className="text-center text-xs text-muted-foreground">
-            {okCount}/4 credentials configured — complete all above to continue
+            {okCount}/3 credentials configured — complete all above to continue
           </div>
         )}
       </DialogContent>