fix: resolve CI type errors in TeamPage and install qrcode.react

- Change Button size="small" to size="sm" (design system API)
- Remove unsupported style prop from Card component
- Ensure qrcode.react is properly installed

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

ui/src/pages/tenant/TeamPage.tsx

@@ -105,7 +105,7 @@ export function TeamPage() {
           </Button>
           <Button
             variant="secondary"
-            size="small"
+            size="sm"
             onClick={() => setMfaResetTarget(row)}
           >
             Reset MFA
@@ -256,7 +256,7 @@ export function TeamPage() {
 
       {/* Reset MFA inline form */}
       {mfaResetTarget && (
-        <Card title={`Reset MFA for ${mfaResetTarget.name || mfaResetTarget.email}`} style={{ marginTop: 16 }}>
+        <Card title={`Reset MFA for ${mfaResetTarget.name || mfaResetTarget.email}`}>
           <Alert variant="warning">
             This will remove all MFA factors for this user. They will need to re-enroll if MFA is required.
           </Alert>