Fix TS6 connection: patch clientinit version at handler level

The @honeybbq/teamspeak-client library sends clientinit directly via
handler.sendPacket() during the handshake, bypassing the commandMiddleware
chain entirely. This meant the ts6VersionMiddleware never intercepted the
handshake clientinit, so TS6 servers always received version 3.5.3 and
silently rejected it (never responding with initserver), causing idle timeout.

Fix: monkey-patch handler.sendPacket() to intercept clientinit packets and
upgrade the version to 3.6.2 before they're sent over the wire.

https://claude.ai/code/session_01QzvMLUT3UkhsffShcY1qzD

src/ts-protocol/client.ts

@@ -10,7 +10,6 @@ import {
   type Identity,
   type TextMessage,
   type ClientInfo,
-  type CommandMiddleware,
 } from "@honeybbq/teamspeak-client";
 import type { Logger } from "../logger.js";
 import {
@@ -18,7 +17,7 @@ import {
   type ServerProtocol,
 } from "./protocol-detect.js";
 import { TS6HttpQuery } from "./http-query.js";
-import { ts6VersionMiddleware } from "./ts6-compat.js";
+import { patchClientInitVersion } from "./ts6-compat.js";
 
 export { CODEC_OPUS_MUSIC } from "./voice.js";
 export type { ServerProtocol } from "./protocol-detect.js";
@@ -154,13 +153,6 @@ export class TS3Client extends EventEmitter {
       this.logger.warn(msg);
     };
 
-    // Apply TS6 version middleware if connecting to a TS6 server
-    const commandMiddleware: CommandMiddleware[] = [];
-    if (this.detectedProtocol === "ts6") {
-      commandMiddleware.push(ts6VersionMiddleware("3.6.2"));
-      this.logger.info("Applying TS6 compatibility: upgrading client_version to 3.6.2");
-    }
-
     this.client = new TS3FullClient(this.identity, addr, this.options.nickname, {
       logger: {
         debug: (msg) => this.logger.debug(msg),
@@ -168,9 +160,30 @@ export class TS3Client extends EventEmitter {
         warn: throttledWarn,
         error: (msg) => this.logger.error(msg),
       },
-      commandMiddleware,
     });
 
+    // Patch handler.sendPacket to intercept clientinit during handshake for TS6.
+    // The library's commandMiddleware only applies to post-connection commands
+    // (sendCommandNoWait/execCommand), but the handshake's clientinit is sent
+    // directly via handler.sendPacket, bypassing middleware entirely.
+    // This monkey-patch ensures the version is upgraded for TS6 servers.
+    if (this.detectedProtocol === "ts6") {
+      this.logger.info("Applying TS6 compatibility: upgrading client_version to 3.6.2");
+      const origSendPacket = this.client.handler.sendPacket.bind(this.client.handler);
+      this.client.handler.sendPacket = (pType: number, data: Uint8Array, flags: number) => {
+        // PacketType.Command = 2
+        if (pType === 2) {
+          const str = Buffer.from(data).toString("utf-8");
+          if (str.startsWith("clientinit ")) {
+            const patched = patchClientInitVersion(str);
+            origSendPacket(pType, Buffer.from(patched), flags);
+            return;
+          }
+        }
+        origSendPacket(pType, data, flags);
+      };
+    }
+
     this.client.on("textMessage", (msg: TextMessage) => {
       const tsMsg: TS3TextMessage = {
         invokerName: msg.invokerName,