feat: add VOX TTS server on port 33003 with webui integration

- New vox-server/server.py (HTTP API matching morshu-server pattern)
- Added voxstart/voxstop/voxstatus commands to ttstoy cog
- WebUI /api/tts/generate and /api/mc/tts now support VOX mode
- Cog_unload stops VOX server automatically

ttstoy/ttstoy.py

@@ -321,6 +321,11 @@ class TtsToy(Cog):
         self.morshu_process = None
         self.morshu_port = 33002
         
+        # VOX server
+        self.vox_dir = Path(__file__).resolve().parent / "vox-server"
+        self.vox_process = None
+        self.vox_port = 33003
+        
         # TTS queue system - one queue per guild
         self.tts_queues = {}  # guild_id -> asyncio.Queue
         self.tts_locks = {}   # guild_id -> asyncio.Lock
@@ -386,6 +391,8 @@ class TtsToy(Cog):
             self._webui_state_processor.stop()
         await self._stop_webui()
         await self._stop_dectalk_server()
+        await self._stop_morshu_server()
+        await self._stop_vox_server()
 
         if self._health_server:
             self._health_server.shutdown()
@@ -572,6 +579,56 @@ class TtsToy(Cog):
             except Exception as e:
                 log.exception(f"Error stopping Morshu server: {e}")
 
+    async def _start_vox_server(self) -> tuple:
+        """Start the built-in VOX TTS server. Returns (success, error_msg)."""
+        try:
+            if self.vox_process and self.vox_process.poll() is None:
+                return True, None
+
+            server_py = self.vox_dir / "server.py"
+            if not server_py.exists():
+                return False, f"server.py not found: {server_py}"
+
+            env = os.environ.copy()
+            env['PORT'] = str(self.vox_port)
+
+            self.vox_process = await asyncio.to_thread(
+                subprocess.Popen,
+                [sys.executable, str(server_py)],
+                cwd=str(self.vox_dir),
+                env=env,
+                stdout=subprocess.PIPE,
+                stderr=subprocess.PIPE,
+                text=True
+            )
+
+            await asyncio.sleep(2)
+
+            if self.vox_process.poll() is not None:
+                stderr = self.vox_process.stderr.read()
+                stdout = self.vox_process.stdout.read()
+                err = stderr or stdout or "Unknown error"
+                log.error(f"VOX server failed (exit {self.vox_process.returncode}): {err}")
+                return False, err
+
+            log.info(f"VOX server started on port {self.vox_port}")
+            return True, None
+        except Exception as e:
+            log.exception(f"Failed to start VOX server: {e}")
+            return False, str(e)
+
+    async def _stop_vox_server(self):
+        """Stop the built-in VOX server."""
+        if self.vox_process and self.vox_process.poll() is None:
+            try:
+                self.vox_process.terminate()
+                await asyncio.sleep(1)
+                if self.vox_process.poll() is None:
+                    self.vox_process.kill()
+                log.info("VOX server stopped")
+            except Exception as e:
+                log.exception(f"Error stopping VOX server: {e}")
+
     async def _get_effective_minimax_voice(self, user: discord.abc.User) -> str:
         mode = await self._get_tts_mode()
         
@@ -2181,6 +2238,58 @@ class TtsToy(Cog):
 
         await ctx.send("\n".join(lines))
 
+    @ttstoy_group.command(name="voxstart")
+    @commands.is_owner()
+    async def vox_start(self, ctx: commands.Context):
+        """Start the built-in VOX TTS server."""
+        await ctx.send("🚀 Starting VOX server...")
+
+        success, error = await self._start_vox_server()
+
+        if success:
+            await ctx.send(
+                f"✅ VOX server started on port {self.vox_port}!\n"
+                f"Switch to VOX mode: `{ctx.clean_prefix}ttstoy mode vox`"
+            )
+        else:
+            err_msg = (error or "Unknown error")[:1500]
+            await ctx.send(f"❌ Failed to start VOX server:\n```\n{err_msg}\n```")
+
+    @ttstoy_group.command(name="voxstop")
+    @commands.is_owner()
+    async def vox_stop(self, ctx: commands.Context):
+        """Stop the built-in VOX server."""
+        if not self.vox_process or self.vox_process.poll() is not None:
+            return await ctx.send("❌ VOX server is not running")
+
+        await self._stop_vox_server()
+        await ctx.send("✅ VOX server stopped")
+
+    @ttstoy_group.command(name="voxstatus")
+    @commands.is_owner()
+    async def vox_status(self, ctx: commands.Context):
+        """Check VOX server status."""
+        process_running = self.vox_process and self.vox_process.poll() is None
+
+        api_responding = False
+        try:
+            r = requests.get(f"http://127.0.0.1:{self.vox_port}/health", timeout=2)
+            api_responding = r.status_code == 200
+        except:
+            pass
+
+        lines = [
+            "**VOX Server Status**",
+            f"Process Running: {'✅ Yes' if process_running else '❌ No'}",
+            f"API Responding: {'✅ Yes' if api_responding else '❌ No'}",
+            f"URL: `http://127.0.0.1:{self.vox_port}`",
+        ]
+
+        if not process_running:
+            lines.append(f"\nStart with: `{ctx.clean_prefix}ttstoy voxstart`")
+
+        await ctx.send("\n".join(lines))
+
     @ttstoy_group.command(name="accessibility")
     @commands.is_owner()
     async def accessibility_toggle(self, ctx: commands.Context):