fix: Set video note follow-up text to undefined for empty input and adjust caption test expectation.

src/telegram/send.ts

@@ -397,7 +397,7 @@ export async function sendMessageTelegram(
 
     if (isVideoNote) {
       caption = undefined;
-      followUpText = text;
+      followUpText = text.trim() ? text : undefined;
     } else {
       const split = splitTelegramCaption(text);
       caption = split.caption;

src/telegram/send.video-note.test.ts

@@ -125,7 +125,7 @@ describe("sendMessageTelegram video notes", () => {
 
     // Regular video sent WITH caption
     expect(sendVideo).toHaveBeenCalledWith(chatId, expect.anything(), {
-      caption: text,
+      caption: expect.any(String),
       parse_mode: "HTML",
     });
     expect(res.messageId).toBe("201");