refactor(pairing): centralize reply formatting

src/pairing/pairing-messages.ts

@@ -0,0 +1,19 @@
+import type { PairingProvider } from "./pairing-store.js";
+
+export function buildPairingReply(params: {
+  provider: PairingProvider;
+  idLine: string;
+  code: string;
+}): string {
+  const { provider, idLine, code } = params;
+  return [
+    "Clawdbot: access not configured.",
+    "",
+    idLine,
+    "",
+    `Pairing code: ${code}`,
+    "",
+    "Ask the bot owner to approve with:",
+    `clawdbot pairing approve --provider ${provider} <code>`,
+  ].join("\n");
+}