Fix mobile navbar disappearing issue and optimize image loading across all pages

- Fix: Removed undefined checkLite function in ControlsDropdown causing navbar to crash on menu close
- Fix: Add justClosedDrawerRef to prevent navbar auto-hide after closing mobile menu
- Optimize: Add loading and fetchPriority attributes to all images across components
- Optimize: Eagerly load above-the-fold images (gallery first 3, certifications first 1+2 badges)
- Optimize: Lazy load below-the-fold images with proper decoding async
- Improve: Better LCP performance and bandwidth usage across gallery, projects, and certifications pages

src/components/ControlsDropdown.tsx

@@ -89,9 +89,6 @@ export default function ControlsDropdown() {
     window.addEventListener('theme-change', handleCustomThemeChange as EventListener);
 
     return () => {
-      window.removeEventListener('tier-change', checkLite);
-      document.removeEventListener('astro:after-swap', checkLite);
-      document.removeEventListener('astro:page-load', checkLite);
       if (darkQuery.removeEventListener) {
         darkQuery.removeEventListener('change', handleSystemThemeChange);
       }