telegram-user: avoid mtcute signal exit-hook

extensions/telegram-user/src/client.ts

@@ -1,13 +1,31 @@
-import { TelegramClient } from "@mtcute/node";
+import { BaseTelegramClient, NodePlatform, TelegramClient } from "@mtcute/node";
+
+class ClawdbotTelegramUserPlatform extends NodePlatform {
+  // mtcute's NodePlatform.beforeExit installs SIGINT/SIGTERM handlers that re-send the signal,
+  // which can race with Clawdbot's graceful shutdown and close sqlite while writes are pending.
+  // We only hook into process exit events (no signal handlers) and rely on Clawdbot to stop cleanly.
+  override beforeExit(fn: () => void): () => void {
+    const onBeforeExit = () => fn();
+    const onExit = () => fn();
+    process.once("beforeExit", onBeforeExit);
+    process.once("exit", onExit);
+    return () => {
+      process.off("beforeExit", onBeforeExit);
+      process.off("exit", onExit);
+    };
+  }
+}
 
 export function createTelegramUserClient(params: {
   apiId: number;
   apiHash: string;
   storagePath: string;
 }) {
-  return new TelegramClient({
+  const client = new BaseTelegramClient({
     apiId: params.apiId,
     apiHash: params.apiHash,
     storage: params.storagePath,
+    platform: new ClawdbotTelegramUserPlatform(),
   });
+  return new TelegramClient({ client });
 }