feat: GET /pair-qr endpoint — QR code in terminal, fix double-port bug

extensions/remote-control/server/server.ts

@@ -28,7 +28,12 @@ import type {
   ExtensionAPI,
   ExtensionContext,
 } from "@earendil-works/pi-coding-agent";
-import { consumePairingToken } from "../auth/pairing.js";
+import {
+  buildPairingUrl,
+  consumePairingToken,
+  generatePairingToken,
+  printPairingQr,
+} from "../auth/pairing.js";
 import { createToken, validateBearer } from "../auth/tokens.js";
 import {
   generateSessionId,
@@ -226,6 +231,46 @@ export async function startServer(
 
     // New API routes (IC-2) — bearer token auth
     const asyncHandler = async (): Promise<boolean> => {
+      // GET /pair-qr — generates pairing token + prints QR to response
+      if (pathname === "/pair-qr" && req.method === "GET") {
+        if (!isAuthenticated(req)) {
+          sendJson(res, 403, { error: "forbidden" });
+          return true;
+        }
+        const addr = httpServer.address() as {
+          address: string;
+          port: number;
+        } | null;
+        const port = addr?.port ?? 7777;
+        const rawHost =
+          (config.publicBaseUrl ?? config.advertisedBaseUrl)
+            ?.replace(/^https?:\/\//, "")
+            .replace(/\/$/, "") ??
+          addr?.address ??
+          "localhost";
+        // Strip :port suffix if publicBaseUrl already contains it
+        const host = rawHost.includes(":")
+          ? rawHost.slice(0, rawHost.lastIndexOf(":"))
+          : rawHost;
+        const pairingEntry = generatePairingToken();
+        const url = buildPairingUrl({
+          host,
+          port,
+          pairingToken: pairingEntry.token,
+          fingerprint: "",
+          sidecarName: "pi-remote",
+        });
+        res.writeHead(200, { "Content-Type": "text/plain; charset=utf-8" });
+        // Render QR inline
+        const qrcode = await import("qrcode");
+        const qr = await qrcode.toString(url, {
+          type: "terminal",
+          small: true,
+        });
+        res.end(`${qr}\n${url}\n\nExpires in 10 minutes.`);
+        return true;
+      }
+
       // POST /pair — unauthenticated, uses one-time pairingToken
       if (pathname === "/pair" && req.method === "POST") {
         let body: Record<string, unknown> = {};