feat(config): add cyberdream theme and tmux-palette integration

dot_config/ghostty/config

@@ -39,6 +39,10 @@ keybind = ctrl+zero=reset_font_size
 keybind = ctrl+shift+period=reload_config
 keybind = shift+enter=text:\n
 
+# command palette: ctrl+space is tmux's root-table C-Space (tmux-palette);
+# sent explicitly as NUL so no keyboard-protocol mode can turn it into a CSI
+keybind = ctrl+space=text:\x00
+
 # tabs → tmux windows
 keybind = ctrl+shift+t=text:\x02c
 keybind = ctrl+shift+w=text:\x02k