R89 A4-A5 移动导航与工作台重排

client/src/components/mobile/MobileBottomNav.tsx

@@ -44,6 +44,7 @@ export function MobileBottomNav() {
               <button
                 key={item.key}
                 type="button"
+                data-testid={`mobile-nav-${item.key}`}
                 className="touch-target flex flex-col items-center justify-center gap-1 rounded-2xl px-2 py-2 text-xs font-medium text-zinc-400"
                 disabled
                 aria-disabled="true"
@@ -60,6 +61,7 @@ export function MobileBottomNav() {
               key={item.key}
               end
               to={item.to}
+              data-testid={`mobile-nav-${item.key}`}
               className={({ isActive }) =>
                 cn(
                   "touch-target flex flex-col items-center justify-center gap-1 rounded-2xl px-2 py-2 text-xs font-medium transition-colors",