chore(deps): bump @honeybbq/teamspeak-client to 0.2.1, drop ts6-compat shim

Version 0.2.1 ships a universal clientinit format that works natively
against both TS3 and TS6 servers:

    client_version: "3.?.? [Build: 5680278000]"
    client_version_sign: DX5NIYLvfJEUjuIbCidnoeozxIDRRkpq3I9vVMBmE9L2qnekOo
                         BzSenkzsg2lC9CMv8K5hkEzhr2TYUYSwUXCg==

The old ts6-compat.ts workaround (monkey-patching handler.sendPacket to
rewrite clientinit's client_version to "3.6.2") is now actively wrong:
it replaces the library's new correct version/signature pair with a
stale one that TS6 servers reject, which is why the first 0.2.1 TS6
handshake attempt still hung at `received initivexpand2`.

Changes:
- package.json: "@honeybbq/teamspeak-client": "^0.1.0" -> "^0.2.1"
- src/ts-protocol/client.ts: remove patchClientInitVersion import and
  the sendPacket monkey-patch block. Leave an inline comment so anyone
  reading the git blame understands why the shim is gone.
- Delete src/ts-protocol/ts6-compat.ts and ts6-compat.test.ts — no
  callers remain.

Other 0.2.x notes worth knowing (no code change here, just documenting):
- ClientOptions gained serverPassword / defaultChannel /
  defaultChannelPassword that are sent DURING clientinit. We still call
  our own joinChannel() post-connect because the existing flow works
  and switching is an orthogonal refactor.
- 0.1.1 contains the P-256 DER encoding fix (PR #5 by ZHANGTIANYAO1).
  Identities generated by 0.1.0 are cryptographically incompatible with
  0.2.x's corrected handshake path — a bot whose identity column was
  populated before this upgrade will hang at `received initivexpand2`
  and fall through the 15s connect deadline. Workaround: clear the
  identity column so the next start generates a fresh key. Server
  groups assigned to the old UID must be re-granted once against the
  new one.

Verification:
- tsc --noEmit clean
- vitest: 93/93 unit tests pass (1 test file removed with ts6-compat)
- scripts/test_full_feature.py against a local TS6 server: 51/51 pass,
  including handshake, voice playback, identity persistence, WebSocket
  stateChange broadcasts, and all corner-case regressions.
- Live: bot connected to TS6 in ~80ms after identity regeneration,
  played NetEase audio through the voice channel, clean stop.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ts-protocol/client.ts

@@ -17,7 +17,6 @@ import {
   type ServerProtocol,
 } from "./protocol-detect.js";
 import { TS6HttpQuery } from "./http-query.js";
-import { patchClientInitVersion } from "./ts6-compat.js";
 
 export { CODEC_OPUS_MUSIC } from "./voice.js";
 export type { ServerProtocol } from "./protocol-detect.js";
@@ -206,37 +205,12 @@ export class TS3Client extends EventEmitter {
     });
 
     await this.client.connect();
-
-    // Patch handler.sendPacket to intercept clientinit during handshake for TS6.
-    //
-    // Why after connect(): The library's connect() internally calls #S() which
-    // replaces this.handler with a fresh PacketHandler. Any patch applied before
-    // connect() would be discarded. Patching here is safe because connect() only
-    // establishes the UDP socket and sends the first Init1 packet — the actual
-    // clientinit command is sent later in async message callbacks (after Init1
-    // round-trips complete), which cannot fire before this sync continuation.
-    //
-    // Why not commandMiddleware: The library's middleware chain only applies to
-    // post-connection commands (sendCommandNoWait/execCommand). The handshake's
-    // clientinit is sent directly via handler.sendPacket(), bypassing middleware.
-    if (this.detectedProtocol === "ts6") {
-      this.logger.info("Applying TS6 compatibility: upgrading client_version to 3.6.2");
-      const handler = this.client.handler;
-      const origSendPacket = handler.sendPacket.bind(handler);
-      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);
-      };
-    }
-
+    // Note: @honeybbq/teamspeak-client 0.2.x ships a universal clientinit
+    // (client_version "3.?.? [Build: 5680278000]" + matching signature)
+    // that works against both TS3 and TS6 servers. The old 3.6.2 monkey-
+    // patch on handler.sendPacket was removed when we bumped to 0.2.1 — it
+    // would have replaced the library's new correct version with a stale
+    // signature and made TS6 handshakes fail.
     await this.client.waitConnected();
     this.clientId = this.client.clientID();
     this.voiceFramesSent = 0;