fix tmux over mosh copy & boot config

modules/home/programs/terminal/tmux/default.nix

@@ -40,7 +40,7 @@ in
         set -g status-position top
         set -g mouse on
         setw -g mode-keys vi
-        set -ga terminal-overrides ",xterm-256color:Tc"
+        set -ag terminal-overrides ",xterm-256color:Tc:Ms=\\E]52;c%p1%.0s;%p2%s\\7"
 
         # Start Index 1
         set -g base-index 1

systems/x86_64-linux/lin-va-terminal/default.nix

@@ -12,6 +12,8 @@ in
     system = {
       boot = {
         enable = true;
+        enableGrub = false;
+        enableSystemd = true;
         xenGuest = true;
       };