feat: enhance UI and fix video handling

- Hide video elements in widget for improved user experience
- Update header background for better contrast
- Prevent empty image containers from rendering
- Remove unsupported video player elements
- Add onclick attribute to links for enhanced functionality
- Include Yandex.ru in target whitelist for expanded compatibility

src/components/header.astro

@@ -156,6 +156,7 @@ const staticProxy = getEnv(import.meta.env, Astro, 'STATIC_PROXY') ?? '/static/'
 <style>
   #site-intro {
     color: var(--secondary-color);
+    background-color: var(--code-background-color);
     word-break: break-word;
 
     & :global(.emoji) {