Show collection preview cards and open collections links locally (#38643)

app/javascript/mastodon/utils/compare_urls.ts

@@ -0,0 +1,14 @@
+export function compareUrls(href1: string, href2: string) {
+  try {
+    const url1 = new URL(href1);
+    const url2 = new URL(href2);
+
+    return (
+      url1.origin === url2.origin &&
+      url1.pathname === url2.pathname &&
+      url1.search === url2.search
+    );
+  } catch {
+    return false;
+  }
+}