Return to the requested URL after logging in (#24637)

When an unauthenticated user opens a deep link, carry the requested
path through the login page in a redirect query param and return to it
after a successful login instead of always going to the home page.
Only same-origin targets are honored.


Claude-Session: https://claude.ai/code/session_011CFGjgYURSRTpXBaxp1Dq7

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

web/src/api/index.tsx

@@ -3,7 +3,11 @@ import { SWRConfig } from "swr";
 import { WsProvider } from "./WsProvider";
 import axios from "axios";
 import { ReactNode } from "react";
-import { isRedirectingToLogin, setRedirectingToLogin } from "./auth-redirect";
+import {
+  getLoginUrl,
+  isRedirectingToLogin,
+  setRedirectingToLogin,
+} from "./auth-redirect";
 
 axios.defaults.baseURL = `${baseUrl}api/`;
 
@@ -34,7 +38,7 @@ export function ApiProvider({ children, options }: ApiProviderType) {
             const loginPage = error.response.headers.get("location") ?? "login";
             if (window.location.href !== loginPage && !isRedirectingToLogin()) {
               setRedirectingToLogin(true);
-              window.location.href = loginPage;
+              window.location.href = getLoginUrl(loginPage);
             }
           }
         },