fix: harden tcp bridge reconnect handling

tools/start_tcp_debug_server.ps1

@@ -0,0 +1,32 @@
+param(
+    [string]$BindHost = "0.0.0.0",
+    [int]$Port = 8081,
+    [switch]$Echo,
+    [switch]$NoStdin
+)
+
+$listeners = Get-NetTCPConnection -LocalPort $Port -State Listen -ErrorAction SilentlyContinue
+if ($listeners) {
+    $pids = $listeners | Select-Object -ExpandProperty OwningProcess -Unique
+    Write-Host "Stopping existing listeners on TCP ${Port}: $($pids -join ', ')"
+    foreach ($procId in $pids) {
+        try {
+            Stop-Process -Id $procId -Force -ErrorAction Stop
+        }
+        catch {
+            Write-Warning "Failed to stop process $procId : $_"
+        }
+    }
+    Start-Sleep -Milliseconds 300
+}
+
+$args = @("tools/tcp_debug_server.py", "--host", $BindHost, "--port", "$Port")
+if ($Echo) {
+    $args += "--echo"
+}
+if ($NoStdin) {
+    $args += "--no-stdin"
+}
+
+Write-Host "Starting TCP debug server on ${BindHost}:${Port}"
+python @args