Increase font size and padding for install commands

Make Linux and macOS command lines more readable with
larger text (font-size:md) and more padding (padding:md).

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: MarkJamesHoward

web/src/pages/download.astro

@@ -62,7 +62,7 @@ const appVersion = import.meta.env.APP_VERSION || "1.0.0";
               <div class="color:c1text2 font-size:sm margin-top:lg">
                 <p class="margin-bottom:sm">Install with:</p>
                 <div class="copy-command-container">
-                  <code id="linux-install-cmd" class="background-color:black color:c1text2 padding:sm border-radius:5px font-size:sm display:block">sudo apt install ./visualgit-linux-amd64.deb</code>
+                  <code id="linux-install-cmd" class="background-color:black color:c1text2 padding:md border-radius:5px font-size:md display:block">sudo apt install ./visualgit-linux-amd64.deb</code>
                   <button
                     type="button"
                     class="copy-btn"
@@ -94,7 +94,7 @@ const appVersion = import.meta.env.APP_VERSION || "1.0.0";
               </a>
               <div class="color:c1text2 font-size:sm margin-top:lg">
                 <p class="margin-bottom:sm">Open the .dmg, drag to Applications. First time, run:</p>
-                <code class="background-color:black color:c1text2 padding:xs border-radius:5px font-size:xs display:block">xattr -cr "/Applications/Visual Git.app"</code>
+                <code class="background-color:black color:c1text2 padding:md border-radius:5px font-size:md display:block">xattr -cr "/Applications/Visual Git.app"</code>
               </div>
             </div>
           </div>