Added aria-label navi-bar and themeswitcher

Author: tkokhing

src/app/_components/main_frame/navi_bar.tsx

@@ -65,6 +65,7 @@ export default function Navigationbar() {
                   <a
                     key={item.name}
                     href={item.href}
+                    aria-label="NavigationBar"
                     aria-current={selected === item.name ? 'page' : undefined}
                     className={classNames(
                       selected === item.name ? 'bg-gray-700 dark:bg-gray-600' : 'text-sky-800 hover:bg-gray-500',

src/app/_components/main_frame/theme-switcher.tsx

@@ -87,6 +87,7 @@ const Switch = () => {
     <button
       suppressHydrationWarning={true}
       className={styles.switch}
+      aria-label="ThemeSwitch"
       onClick={handleModeSwitch}
     >
     </button>