android-native: auto hunt, in-client account registration, mobile UI polish

- Auto hunt (client-only): PythonPlayerAutoHunt.cpp + AutoHuntScript.inc as the
  embedded mt_autohunt module, AUTO touch button, F9/F8.
- Account registration: tools/40250/register_server.py (rc.d mt_register, :11080)
  inserts into account.account; net.RegisterAccount/GetRegisterAccountResult
  (PythonAccountRegister.cpp) and the mt_register login-window dialog
  (RegisterScript.inc).
- --py-exec also runs in --login-screen mode for scripted login-screen tests.
- Touch controller, window manager and render command updates for the
  Android native client.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

extension/src/platform/UserInterface/PythonApplication.cpp

@@ -176,7 +176,7 @@ bool CPythonApplication::Create(PyObject*, const char*, int, int, int)
 
 	if (IsNativeTerrainRenderEnabled())
 	{
-		const bool use_hardware_cursor = PythonBoot::HostHardwareCursorEnabled();
+		const bool use_hardware_cursor = PythonBoot::HostHardwareCursorEnabled() || PythonBoot::TouchInput();
 		if (CPythonSystem::InstancePtr() && CPythonSystem::Instance().GetConfig())
 			CPythonSystem::Instance().GetConfig()->is_software_cursor = !use_hardware_cursor;
 		SetCursorMode(use_hardware_cursor ? CURSOR_MODE_HARDWARE : CURSOR_MODE_SOFTWARE);
@@ -214,6 +214,8 @@ void CPythonApplication::RenderGame()
 	{
 		long lx, ly;
 		UI::CWindowManager::Instance().GetMousePosition(lx, ly);
+		// PORT: window coordinates -> the screen coordinates of the full-width 3D view.
+		lx += UI::CWindowManager::Instance().GetScreenOffsetX();
 		CPythonGraphic::Instance().SetCursorPosition(lx, ly);
 	}
 
@@ -453,7 +455,8 @@ int s_iCursorMode = CPythonApplication::CURSOR_MODE_HARDWARE;         // m_iCurs
 void CPythonApplication::SetCursorVisible(BOOL bFlag, bool bLiarCursorOn)
 {
 	s_bCursorVisible = bFlag;
-	s_bLiarCursorOn = bLiarCursorOn;
+	// PORT: a touch screen has no cursor, not even the stand-in 40250 draws while the real one is hidden.
+	s_bLiarCursorOn = bLiarCursorOn && !PythonBoot::TouchInput();
 	// PORT: 40250 also counts ShowCursor up or down in hardware mode; the host has no OS cursor to hide.
 }