feat: add duplicates count to scan results and update success message in SettingsPage

src/pages/admin/SettingsPage.tsx

@@ -49,7 +49,7 @@ export function SettingsPage() {
       const response = await adminService.scanSounds()
       setLastScanResults(response)
       toast.success(
-        `Sound scan completed! Added: ${response.results.added}, Updated: ${response.results.updated}, Deleted: ${response.results.deleted}`,
+        `Sound scan completed! Added: ${response.results.added}, Updated: ${response.results.updated}, Deleted: ${response.results.deleted}${response.results.duplicates > 0 ? `, Duplicates: ${response.results.duplicates}` : ''}`,
       )
     } catch (error) {
       toast.error('Failed to scan sounds')
@@ -151,6 +151,9 @@ export function SettingsPage() {
                     <div>🔄 Updated: {lastScanResults.results.updated}</div>
                     <div>🗑️ Deleted: {lastScanResults.results.deleted}</div>
                     <div>⏭️ Skipped: {lastScanResults.results.skipped}</div>
+                    {lastScanResults.results.duplicates > 0 && (
+                      <div>📄 Duplicates: {lastScanResults.results.duplicates}</div>
+                    )}
                     {lastScanResults.results.errors.length > 0 && (
                       <div>
                         ❌ Errors: {lastScanResults.results.errors.length}