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/VoiceAgent.tsx

@@ -55,6 +55,7 @@ export default function VoiceAgent({ locale, onComplete }: VoiceAgentProps) {
     transcript,
     selections,
     isAnalyzingSite,
+    isGeneratingBrief,
     agentAmplitude,
     startConversation,
     endConversation,
@@ -176,7 +177,7 @@ export default function VoiceAgent({ locale, onComplete }: VoiceAgentProps) {
           )}
         </motion.div>
 
-        {/* Analyzing site badge */}
+        {/* Status badges */}
         <AnimatePresence>
           {isAnalyzingSite && (
             <motion.div
@@ -191,6 +192,19 @@ export default function VoiceAgent({ locale, onComplete }: VoiceAgentProps) {
               {t('voice.analyzingSite')}
             </motion.div>
           )}
+          {isGeneratingBrief && !completedBrief && (
+            <motion.div
+              initial={{ opacity: 0, y: -4 }}
+              animate={{ opacity: 1, y: 0 }}
+              exit={{ opacity: 0, y: -4 }}
+              className="flex items-center gap-1.5 px-3 py-1.5 rounded-full bg-primary/10 text-primary-dark text-xs font-medium"
+            >
+              <motion.div animate={{ rotate: 360 }} transition={{ duration: 1, repeat: Infinity, ease: 'linear' }}>
+                <Loader2 size={11} />
+              </motion.div>
+              {locale === 'fr' ? 'Génération de votre brief...' : 'Generating your brief...'}
+            </motion.div>
+          )}
         </AnimatePresence>
 
         {/* Error message */}