v4: every request about a user, and the dump editor's path, come from one builder each — fourteen places wrote /api/users/<key>/… by hand, some encoding a handle (@alice%40music.example) and some not, a slug never; userApiUrl (src/utils/shared/urls.ts) now writes them all, by the user's id or by @ and the handle a page's path gives, each segment encoded. The editor's path was the dump's page's with /edit added in two places; dumpPath takes the view, as userPath and feedPath do.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/components/profile/ProfileManageTab.tsx

@@ -7,7 +7,7 @@
  */
 
 import { Trans } from "@lingui/react/macro";
-import { API_URL } from "../../config/api.ts";
+import { userApiUrl } from "../../utils/shared/urls.ts";
 import type { Wire } from "../../../shared/api.ts";
 import type { PublicUser } from "../../../shared/user.ts";
 import { expectOk } from "../../utils/shared/api.ts";
@@ -42,7 +42,7 @@ export function ProfileManageTab(
   async function rename(username: string): Promise<string> {
     const renamed = deserializePublicUser(
       await expectOk<Wire<PublicUser>>(
-        await authFetch(`${API_URL}/api/users/${user.id}/username`, {
+        await authFetch(userApiUrl(user, "username"), {
           method: "PATCH",
           body: JSON.stringify({ username }),
         }),