[tmux] Add mouse support and vi bindings.

home-manager/features/shell.nix

@@ -20,9 +20,6 @@
     psmisc # fuser, killall, pstree
     lsof
 
-    # Session management
-    tmux
-
     # Archives
     zip
     xz
@@ -76,6 +73,11 @@
   };
 
   programs = {
+    tmux = {
+      enable = true;
+      mouse = true;
+      keyMode = "vi";
+    };
     zoxide = {
       # TODO: Learn all the capabilities of zoxide and use them.
       enable = true;