Hide diagnostic steps once verdict is shown

The diagnostic sequence card was persisting as a blank-looking panel
between the input and the verdict. Now it only shows while diagnosis
is running, giving way to the verdict card once complete.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: SHAcollision

src/app/page.tsx

@@ -120,8 +120,8 @@ export default function Home() {
             </p>
           )}
 
-          {/* Diagnostic steps */}
-          {showDiagnosis && !showFix && !showTracker && !showReceipt && (
+          {/* Diagnostic steps — hide once verdict is ready */}
+          {showDiagnosis && !showVerdict && !showFix && !showTracker && !showReceipt && (
             <DiagnosticSequence
               steps={diagnosis.steps}
               isRunning={isLoading}