feat(ui): add identity management for tenants and users

* Implement tenant and user creation in IdentityPage
* Add API calls for managing tenants and users
* Introduce tenant-scoped API requests
* Update sidebar to include identity navigation
* Create BooleanStatusBadge component for key status

internal/auth/middleware.go

@@ -53,7 +53,11 @@ func Middleware(cfg config.AuthConfig, keyring *Keyring, oauthRegistry *OAuthReg
 	}
 	withTenant := func(ctx context.Context, keyID string) context.Context {
 		ctx = context.WithValue(ctx, keyIDContextKey, keyID)
-		return tenancy.WithTenantKey(ctx, keyID)
+		tenantID := keyID
+		if keyring != nil {
+			tenantID = keyring.TenantForKey(keyID)
+		}
+		return tenancy.WithTenantKey(ctx, tenantID)
 	}
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {