Fix standalone emoji not rendering at jumbo 100px size.

Detect emoji-only messages more reliably (including mx-emoticon HTML), bypass folds Text sizing when jumbo, and force 100px emote dimensions via data-jumbo-emoji styles.

src/app/utils/regex.ts

@@ -24,3 +24,28 @@ export const EMOJI_PATTERN = `[#*0-9]\uFE0F?\u20E3|[\xA9\xAE\u203C\u2049\u2122\u
 export const JUMBO_EMOJI_REG = new RegExp(
   `^(((${EMOJI_PATTERN})|(:.+?:))(${VARIATION_SELECTOR_PATTERN}|\\s)*){1,10}$`
 );
+
+/** Zero-width / format chars that break naive emoji-only matching. */
+const JUMBO_IGNORE_CHARS_REG = /[\u200B-\u200D\uFEFF\u00AD\u2060]/g;
+
+const ONLY_MX_EMOTICON_HTML_REG =
+  /^(?:\s|<br\s*\/?>)*((?:<img\b[^>]*\bdata-mx-emoticon\b[^>]*\/?>)(?:\s|<br\s*\/?>)*){1,10}$/i;
+
+/**
+ * True when a message is emoji/custom-emote only (Discord-style jumbo).
+ * Strips zero-width chars and also accepts HTML that is only mx-emoticon imgs.
+ */
+export const isJumboEmoji = (body: string, customBody?: string): boolean => {
+  const plain = body.replace(JUMBO_IGNORE_CHARS_REG, '').trim();
+  if (plain.length > 0 && JUMBO_EMOJI_REG.test(plain)) return true;
+
+  if (typeof customBody === 'string') {
+    const html = customBody
+      .replace(JUMBO_IGNORE_CHARS_REG, '')
+      .trim()
+      .replace(/(<br\s*\/?>\s*)+$/gi, '');
+    if (html.length > 0 && ONLY_MX_EMOTICON_HTML_REG.test(html)) return true;
+  }
+
+  return false;
+};