fix: newline chunking across channels

src/config/types.telegram.ts

@@ -80,6 +80,8 @@ export type TelegramAccountConfig = {
   dms?: Record<string, DmConfig>;
   /** Outbound text chunk size (chars). Default: 4000. */
   textChunkLimit?: number;
+  /** Chunking mode: "length" (default) splits by size; "newline" splits on every newline. */
+  chunkMode?: "length" | "newline";
   /** Disable block streaming for this account. */
   blockStreaming?: boolean;
   /** Chunking config for draft streaming in `streamMode: "block"`. */