/**

* Deduplicate media URLs in a final-reply payload against media already

* delivered via block replies. Returns the deduplicated payload, or

* undefined if the payload should be skipped entirely (all media already

* sent and no text remains).

*/

export function deduplicateBlockSentMedia<

T extends { mediaUrl?: string; mediaUrls?: string[]; text?: string },

>(payload: T, sentBlockMediaUrls: ReadonlySet<string>): T | undefined {

recordInboundSession: context.turn.recordInboundSession,

record: context.turn.record,

runDispatch: () => {

// Track media URLs delivered via block replies so final replies

// can skip duplicates. Without this, non-streaming Telegram

// delivers each MEDIA: attachment twice — once from the

// media-only block reply and once from the final reply.

const sentBlockMediaUrls = new Set<string>();

return telegramDeps.dispatchReplyWithBufferedBlockDispatcher({