Fix: Format net-state addresses as narrow strings on the client

The client is a MultiByte build, so the destination buffers are char[]
and _T("%s:%u") expands to an ANSI format that expects a char pointer.
The code nevertheless converted inet_ntoa() output to WCHAR* first, and
the ANSI %s stopped at the zero byte that follows the first wide
character. Every address therefore collapsed to its leading digit, so
192.168.0.55:443 was shown as 1 and 0.0.0.0:80 as 0 in the local and
remote address columns of the network connections tab.

Write the address and port straight into the char buffers with
sprintf_s in all four enumeration paths (legacy and Vista APIs, TCP and
UDP), and drop the now unused char2wchar_t helper.

Co-Authored-By: deepseek-flash

client/MachineManager.h

@@ -35,7 +35,6 @@ private:
     bool Is64BitOS();
     bool Is64BitPorcess(DWORD dwProcessID);
     char* ProcessPidToName(HANDLE hProcessSnap, DWORD ProcessId, char* ProcessName);
-    wchar_t* char2wchar_t(char* cstr);
     BOOL EnablePrivilege(LPCTSTR lpPrivilegeName, BOOL bEnable);
     void DeleteService(LPBYTE lpBuffer, UINT nSize);
     void MyControlService(LPBYTE lpBuffer, UINT nType);