Default live DM test target to zzib

poc/src/test-dm.ts

@@ -1,19 +1,22 @@
 /*
  * Veskslop Phase 0 — live DM send test through a running Vesktop instance.
  *
- * Sanctioned test target: user zzib. Set TEST_DM_USER_ID to their user ID.
+ * Sanctioned test target: user zzib. Defaults to their user ID.
  * This talks to the control socket directly (which must be a real Vesktop,
  * not the mock) and paces the command like everything else.
  *
  * Usage:
- *   TEST_DM_USER_ID=... pnpm poc:dm
+ *   pnpm poc:dm
  *   TEST_DM_USER_ID=... TEST_DM_CONTENT="hello" pnpm poc:dm
  */
 
 import { paced } from "./pacing.js";
 import { sendVesktopCommand, socketPath } from "./vesktop-socket.js";
 
-const userId = process.env.TEST_DM_USER_ID;
+/** zzib — the only sanctioned live-send target. */
+const DEFAULT_TEST_DM_USER_ID = "177117296140091393";
+
+const userId = process.env.TEST_DM_USER_ID ?? DEFAULT_TEST_DM_USER_ID;
 const content = process.env.TEST_DM_CONTENT ?? "veskslop test dm";
 
 if (!userId) {