Only the last emoji shortname in a message is converted to unicode

[yash113gadia]

Description

parseEmoji (packages/react/src/lib/emoji.js) only ever converts a single emoji shortname in a given text. It collects every :shortname: match with a global regex but then picks the last match and runs one String.replace, which replaces the first occurrence of that match string:

export const parseEmoji = (text) => {
  const regx = /:([^:]*):/g;
  const regx_data = text.match(regx);
  if (regx_data) {
    const result = regx_data[regx_data.length - 1];
    const d = emojione.shortnameToUnicode(result);
    if (d !== undefined) text = text.replace(result, d);
  }
  return text;
};

So any text containing more than one shortname is rendered incorrectly.

Steps to reproduce

1. In the message box, paste :smile: and :heart: (paste, so it arrives in one change rather than being typed char-by-char).
2. Or send a file with an attachment caption containing two shortnames (the caption is parsed once on submit in AttachmentPreview).

Expected

Both shortnames convert: 😄 and ❤️

Actual

Only the last converts and the first is left as raw text: :smile: and ❤️. With a repeated shortname like :tada: foo :tada:, the first occurrence is converted and the second is left literal (🎉 foo :tada:).

Notes

Incremental typing usually hides this because each shortname is converted as it's completed, but pasting and attachment captions both pass a full multi-shortname string in one call.

emoji-toolkit's shortnameToUnicode() already converts every shortname in a string and leaves unknown shortnames / plain text untouched, so the hand-rolled match/replace is both buggy and unnecessary.