correctly handle MXIDs with not just-domain server names; update testdata config to include that case by default; fixes #239

src/utils/mxid.ts

@@ -44,6 +44,11 @@ export function generateRandomMXID(): string {
 export function returnMXID(input: string | Identifier): string {
   const homeserver = localStorage.getItem("home_server");
 
+  // when homeserver is not (just) a domain name, but a domain:port or even an IPv6 address
+  if (input.endsWith(homeserver) && input.startsWith("@")) {
+    return input as string; // Already a valid MXID
+  }
+
   // Check if the input already looks like a valid MXID (i.e., starts with "@" and contains ":")
   if (isMXID(input)) {
     return input as string; // Already a valid MXID