Renders an OIDC Front-Channel Logout 1.0 HTML page: one hidden <iframe> per RP
that has a frontchannelLogoutUri. Each iframe URL carries iss and optionally
sid query parameters (sid included when frontchannelLogoutSessionRequired
is not explicitly false). When postLogoutRedirectUri is provided, appends
a <script> that redirects after redirectDelayMs to let iframes load.
Pure function: does no I/O, returns a string. Callers MUST send with
Content-Type: text/html; charset=utf-8.
Renders an OIDC Front-Channel Logout 1.0 HTML page: one hidden
<iframe>per RP that has afrontchannelLogoutUri. Each iframe URL carriesissand optionallysidquery parameters (sid included whenfrontchannelLogoutSessionRequiredis not explicitlyfalse). WhenpostLogoutRedirectUriis provided, appends a<script>that redirects afterredirectDelayMsto let iframes load.Pure function: does no I/O, returns a string. Callers MUST send with
Content-Type: text/html; charset=utf-8.