move dumb loop to regex replace

Signed-off-by: GitHub <[email protected]>

backend/src/utils.ts

@@ -625,7 +625,6 @@ const plainLinkRegex = /((?!https?:\/\/)\S)+\.\S+/; // anything.anything, withou
 // Both of the above, with precedence on the first one
 const urlRegex = new RegExp(`(${realLinkRegex.source}|${plainLinkRegex.source})`, "g");
 const protocolRegex = /^[a-z]+:\/\//;
-const hostnameTldRegex = /^[a-z]$/;
 
 interface MatchedURL extends URL {
   input: string;
@@ -651,10 +650,7 @@ export function getUrlsInString(str: string, onlyUnique = false): MatchedURL[] {
     let hostname = matchUrl.hostname.toLowerCase();
 
     if (hostname.length > 3) {
-      while (!hostnameTldRegex.test(hostname.at(-1)!)) {
-        if (!hostname.length) break;
-        hostname = hostname.slice(0, -1);
-      }
+      hostname = hostname.replace(/[^a-z]+$/, "");
     }
 
     const hostnameParts = hostname.split(".");