The original CSS scoped .flag to .locale-switcher__option only, so the flag SVG inside the <summary> trigger rendered at 0x0 (intrinsic svg defaults). Add a .locale-switcher .flag rule so the closed trigger visibly shows a 24x16 flag. Playwright recheck: trigger 52x44, flag 24x16 (matches previous inline flags). 141/141 PHPUnit green.