Improve dismissable banner buttons when they dont fit on 1 line (#25580)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/mastodon/features/home_timeline/components/explore_prompt.jsx

@@ -15,9 +15,11 @@ export const ExplorePrompt = () => (
     <h1><FormattedMessage id='home.explore_prompt.title' defaultMessage='This is your home base within Mastodon.' /></h1>
     <p><FormattedMessage id='home.explore_prompt.body' defaultMessage="Your home feed will have a mix of posts from the hashtags you've chosen to follow, the people you've chosen to follow, and the posts they boost. It's looking pretty quiet right now, so how about:" /></p>
 
-    <div className='dismissable-banner__message__actions'>
-      <Link to='/explore' className='button'><FormattedMessage id='home.actions.go_to_explore' defaultMessage="See what's trending" /></Link>
-      <Link to='/explore/suggestions' className='button button-tertiary'><FormattedMessage id='home.actions.go_to_suggestions' defaultMessage='Find people to follow' /></Link>
+    <div className='dismissable-banner__message__actions__wrapper'>
+      <div className='dismissable-banner__message__actions'>
+        <Link to='/explore' className='button'><FormattedMessage id='home.actions.go_to_explore' defaultMessage="See what's trending" /></Link>
+        <Link to='/explore/suggestions' className='button button-tertiary'><FormattedMessage id='home.actions.go_to_suggestions' defaultMessage='Find people to follow' /></Link>
+      </div>
     </div>
   </DismissableBanner>
 );

app/javascript/styles/mastodon/components.scss

@@ -8768,9 +8768,18 @@ noscript {
 
     &__actions {
       display: flex;
-      align-items: center;
+      flex-wrap: wrap;
       gap: 4px;
-      margin-top: 30px;
+
+      &__wrapper {
+        display: flex;
+        margin-top: 30px;
+      }
+
+      .button {
+        display: block;
+        flex-grow: 1;
+      }
     }
 
     .button-tertiary {