feat: show "Generating your brief..." badge during brief generation

Visual feedback while the complete_brief API call runs (~15s).
Badge appears below the orb with a spinner animation.

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

src/components/configurator/VoiceAgentProvider.tsx

@@ -21,6 +21,7 @@ interface VoiceAgentContextValue {
   transcript: TranscriptEntry[];
   selections: Partial<WizardFormData>;
   isAnalyzingSite: boolean;
+  isGeneratingBrief: boolean;
   userAmplitude: number;
   agentAmplitude: number;
   startConversation: () => Promise<void>;
@@ -127,6 +128,7 @@ export default function VoiceAgentProvider({ locale, children }: VoiceAgentProvi
   const [transcript, setTranscript] = useState<TranscriptEntry[]>([]);
   const [selections, setSelections] = useState<Partial<WizardFormData>>({});
   const [isAnalyzingSite, setIsAnalyzingSite] = useState(false);
+  const [isGeneratingBrief, setIsGeneratingBrief] = useState(false);
   const [userAmplitude, setUserAmplitude] = useState(0);
   const [agentAmplitude, setAgentAmplitude] = useState(0);
   const [completedBrief, setCompletedBrief] = useState<string | null>(null);
@@ -195,6 +197,7 @@ export default function VoiceAgentProvider({ locale, children }: VoiceAgentProvi
         // Prevent duplicate submissions
         if (briefSubmittedRef.current) return JSON.stringify({ success: true, message: 'Brief already submitted' });
         briefSubmittedRef.current = true;
+        setIsGeneratingBrief(true);
         console.log('[VoiceAgent] complete_brief called, generating...');
         try {
           const formData = { ...DEFAULT_FORM_DATA, ...(args as Partial<WizardFormData>), locale };
@@ -475,6 +478,7 @@ export default function VoiceAgentProvider({ locale, children }: VoiceAgentProvi
     transcript,
     selections,
     isAnalyzingSite,
+    isGeneratingBrief,
     userAmplitude,
     agentAmplitude,
     startConversation,