fix: support ts backend core cli probes

scripts/src/ssh.ts

@@ -661,8 +661,9 @@ export function wrapSshRemoteCommand(command: string | null): string {
 function brokerSource(): string {
   return String.raw`
 const open = JSON.parse(process.argv[2] || process.argv[1] || "{}");
-const token = process.env.PROVIDER_TOKEN || "";
-const url = "ws://backend-core:8080/ws/ssh?token=" + encodeURIComponent(token);
+const token = process.env.PROVIDER_TOKEN || process.env.UNIDESK_PROVIDER_TOKEN || "";
+const baseUrl = process.env.UNIDESK_SSH_BROKER_URL || "ws://backend-core:8080/ws/ssh";
+const url = baseUrl + "?token=" + encodeURIComponent(token);
 const ws = new WebSocket(url);
 let exitCode = 255;
 let canSend = false;
@@ -802,13 +803,25 @@ export async function runSsh(config: UniDeskConfig, providerId: string, args: st
     cols: size.cols,
     rows: size.rows,
   };
+  const payloadJson = JSON.stringify(payload);
+  const encodedBrokerSource = Buffer.from(brokerSource(), "utf8").toString("base64");
+  const script = [
+    "set -euo pipefail",
+    `payload=${shellQuote(payloadJson)}`,
+    "if command -v backend-core >/dev/null 2>&1; then",
+    '  exec backend-core --ssh-broker "$payload"',
+    "fi",
+    `export UNIDESK_SSH_BROKER_URL=${shellQuote("ws://127.0.0.1:8080/ws/ssh")}`,
+    `printf %s ${shellQuote(encodedBrokerSource)} | base64 -d >/tmp/unidesk-ssh-broker.js`,
+    "exec bun /tmp/unidesk-ssh-broker.js \"$payload\"",
+  ].join("\n");
   const child = spawn("docker", [
     "exec",
     "-i",
     "unidesk-backend-core",
-    "backend-core",
-    "--ssh-broker",
-    JSON.stringify(payload),
+    "sh",
+    "-lc",
+    script,
   ], {
     cwd: repoRoot,
     stdio: ["pipe", "pipe", "pipe"],