Add tweet embed and oEmbed API support

public/js/embedTweet.js

@@ -0,0 +1,23 @@
+// This runs after embedResize.js sets up the sendHeight function
+(function(sendHeight) {
+  // Make images load eagerly so height updates correctly
+  var lazyImages = document.querySelectorAll('img[loading="lazy"]');
+  for (var i = 0; i < lazyImages.length; i++) {
+    lazyImages[i].loading = 'eager';
+  }
+
+  // Update height when images finish loading
+  var allImages = document.querySelectorAll('img');
+  for (var i = 0; i < allImages.length; i++) {
+    var img = allImages[i];
+    if (!img.complete) {
+      img.addEventListener('load', sendHeight);
+    }
+  }
+
+  // Open all links in new tab (we're in an iframe)
+  var allLinks = document.querySelectorAll('a');
+  for (var i = 0; i < allLinks.length; i++) {
+    allLinks[i].target = '_blank';
+  }
+})(arguments[0]);