Add -tbaud switch: force COM1 RIO baud for high-speed replica boards

-tbaud <rate> (9600-921600) overrides the COM1 baud rate while keeping
old-RIO (type 0) protocol behavior unchanged; independent of -trio.
SetupComm buffers 2/2 -> 1024/1024 only when the override is active.
Rebuilt Release + Profile (0 errors), deployed rel.bin\MW4.exe to MW4\.
run-firestorm driver: game-start now takes optional extra args.
CLAUDE.md: branch notes incl. the CP949 comment-encoding hazard
(mw4 sources must be edited byte-safely).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.claude/skills/run-firestorm/driver.ps1

@@ -5,7 +5,8 @@
 #   report <MissionName>   HEADLESS: editor loads the mission, writes <MissionName>.report, exits.
 #                          Prints the report. (Editor always exits code 1 by design -- not an error.)
 #   editor-start           launch the mission editor (windowed), wait for its UI to appear
-#   game-start             launch the game (fullscreen 800x600 16-bit -- grabs the display)
+#   game-start [args]      launch the game (fullscreen 800x600 16-bit -- grabs the display);
+#                          optional quoted extra command line, e.g. game-start "-tbaud 115200"
 #   shot [name]            screenshot -> shots\<name|timestamp>.png (whole virtual screen;
 #                          fullscreen-exclusive DDraw has no window rect worth cropping)
 #   windows                enumerate top-level windows (detects the editor's modal dialogs)
@@ -138,7 +139,11 @@ switch ($Command) {
 
     'game-start' {
         if (Get-Process -Name 'MW4' -ErrorAction SilentlyContinue) { throw 'MW4 already running. Run: driver.ps1 stop' }
-        Start-Process -FilePath (Join-Path $GameDir 'MW4.exe') -WorkingDirectory $GameDir | Out-Null
+        if ($Arg) {
+            Start-Process -FilePath (Join-Path $GameDir 'MW4.exe') -ArgumentList $Arg -WorkingDirectory $GameDir | Out-Null
+        } else {
+            Start-Process -FilePath (Join-Path $GameDir 'MW4.exe') -WorkingDirectory $GameDir | Out-Null
+        }
         # NB: the game window title is 'BattleTech Firestorm' (not MechWarrior/MW4)
         $w = Wait-ForWindow 'Firestorm|FireStorm' 120
         if ($w) { Write-Output "Game up: '$($w.Title)' ($($w.W)x$($w.H))"; Show-Windows }