fix(router): update AdminUsers call to match new signature

Fix function call to pass currentUser as first parameter instead of
templateUsers, matching the refactored AdminUsers template signature.

internal/router/frontend.go

@@ -458,7 +458,7 @@ func registerFrontendRoutes(cfg *Config) {
 		}
 
 		var buf bytes.Buffer
-		err = templates.AdminUsers(templateUsers, adminCount, user.ID).Render(c.Request().Context(), &buf)
+		err = templates.AdminUsers(user, templateUsers, adminCount).Render(c.Request().Context(), &buf)
 		if err != nil {
 			return err
 		}