fix: support spaced emoji media attributes

admin/dashboard/blueprints/messages.py

@@ -36,7 +36,11 @@ def _is_usable_local_media_path(value: str) -> bool:
 def _extract_emoji_preview_url(xml_text: str) -> str:
     if not xml_text:
         return ''
-    patterns = (r'cdnurl="([^"]+)"', r'encrypturl="([^"]+)"', r'externurl="([^"]+)"')
+    patterns = (
+        r'cdnurl\s*=\s*"([^"]+)"',
+        r'encrypturl\s*=\s*"([^"]+)"',
+        r'externurl\s*=\s*"([^"]+)"'
+    )
     for pattern in patterns:
         match = re.search(pattern, xml_text)
         if match: