fix: gate SSO and Audit behind Team Pro license tier (#213)

SSO settings tab and content were visible to Personal Pro users despite
being a Team Pro-only feature. Added TeamProGate component that checks
both isPro and variant === 'team', and hid the SSO nav button for
non-Team Pro users. Audit was already correctly gated in EditorLayout.

frontend/src/components/SSOSection.tsx

@@ -7,7 +7,7 @@ import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@
 import { Badge } from '@/components/ui/badge';
 import { toast } from 'sonner';
 import { apiFetch } from '@/lib/api';
-import { ProGate } from './ProGate';
+import { TeamProGate } from './TeamProGate';
 import { Shield, Loader2, CheckCircle, XCircle } from 'lucide-react';
 
 interface SSOProviderConfig {
@@ -320,7 +320,7 @@ export function SSOSection() {
         try {
             const res = await apiFetch('/sso/config');
             if (res.ok) setConfigs(await res.json());
-        } catch { /* ignore - ProGate will handle non-pro */ }
+        } catch { /* ignore - TeamProGate will handle non-pro */ }
     };
 
     // eslint-disable-next-line react-hooks/set-state-in-effect
@@ -329,7 +329,7 @@ export function SSOSection() {
     const getConfig = (provider: string) => configs.find(c => c.provider === provider) || null;
 
     return (
-        <ProGate featureName="SSO Authentication">
+        <TeamProGate featureName="SSO Authentication">
             <div className="space-y-6">
                 <div>
                     <h3 className="text-lg font-semibold tracking-tight flex items-center gap-2">
@@ -360,6 +360,6 @@ export function SSOSection() {
                     <p>For OIDC providers, set the OAuth callback URL to: <code className="bg-muted px-1 rounded">{'https://<your-sencho-url>/api/auth/sso/oidc/<provider>/callback'}</code></p>
                 </div>
             </div>
-        </ProGate>
+        </TeamProGate>
     );
 }

frontend/src/components/SettingsModal.tsx

@@ -998,7 +998,7 @@ export function SettingsModal({ isOpen, onClose }: SettingsModalProps) {
                         {!isRemote && isAdmin && (
                             <NavButton section="users" icon={<Users className="w-4 h-4 mr-2" />} label="Users" />
                         )}
-                        {!isRemote && isAdmin && (
+                        {!isRemote && isAdmin && isPro && license?.variant === 'team' && (
                             <NavButton section="sso" icon={<Shield className="w-4 h-4 mr-2" />} label="SSO" />
                         )}
                         <NavButton

frontend/src/components/TeamProGate.tsx

@@ -0,0 +1,73 @@
+import { type ReactNode, useState } from 'react';
+import { Crown } from 'lucide-react';
+import { Button } from '@/components/ui/button';
+import { useLicense } from '@/context/LicenseContext';
+
+interface TeamProGateProps {
+    children: ReactNode;
+    featureName?: string;
+}
+
+const DISMISS_KEY = 'sencho-team-upgrade-prompt-dismissed';
+const DISMISS_DURATION_MS = 24 * 60 * 60 * 1000; // 24 hours
+
+function isDismissedFromStorage(): boolean {
+    const dismissedAt = localStorage.getItem(DISMISS_KEY);
+    return !!dismissedAt && Date.now() - parseInt(dismissedAt, 10) < DISMISS_DURATION_MS;
+}
+
+export function TeamProGate({ children, featureName = 'This feature' }: TeamProGateProps) {
+    const { isPro, license } = useLicense();
+    const [dismissed, setDismissed] = useState(isDismissedFromStorage);
+
+    if (isPro && license?.variant === 'team') return <>{children}</>;
+
+    if (dismissed) {
+        return (
+            <div className="relative">
+                <div className="opacity-40 pointer-events-none select-none blur-[2px]">
+                    {children}
+                </div>
+                <div className="absolute inset-0 flex items-start justify-center pt-8">
+                    <div className="flex items-center gap-2 px-3 py-1.5 rounded-full bg-muted/80 border border-border text-muted-foreground text-xs">
+                        <Crown className="w-3 h-3" />
+                        Upgrade to Team Pro to unlock
+                    </div>
+                </div>
+            </div>
+        );
+    }
+
+    return (
+        <div className="flex flex-col items-center justify-center h-full gap-6 p-8">
+            <div className="flex items-center justify-center w-16 h-16 rounded-2xl bg-muted/50 border border-border">
+                <Crown className="w-8 h-8 text-muted-foreground" />
+            </div>
+            <div className="text-center max-w-md">
+                <h3 className="text-lg font-semibold mb-2">{featureName} requires Sencho Team Pro</h3>
+                <p className="text-sm text-muted-foreground">
+                    Unlock team features like SSO authentication, audit logging, and unlimited user accounts with a Sencho Team Pro license.
+                </p>
+            </div>
+            <div className="flex gap-3">
+                <Button
+                    variant="outline"
+                    size="sm"
+                    onClick={() => {
+                        localStorage.setItem(DISMISS_KEY, Date.now().toString());
+                        setDismissed(true);
+                    }}
+                >
+                    Dismiss
+                </Button>
+                <Button
+                    size="sm"
+                    onClick={() => window.open('https://sencho.io/pricing', '_blank')}
+                >
+                    <Crown className="w-4 h-4 mr-2" />
+                    Get Team Pro
+                </Button>
+            </div>
+        </div>
+    );
+}