move home-manager env vars into system env vars where they belong

this lets Qt apps properly start under phosh.

git editor is still nano -- unsure why.

helpers/gui/phosh.nix

@@ -23,4 +23,9 @@
     theme = default
     '';
   };
+
+  environment.variables = {
+    # Qt apps won't always start unless this env var is set
+    QT_QPA_PLATFORM = "wayland";
+  };
 }

helpers/home-manager-gen-colin.nix

@@ -177,15 +177,6 @@
     "cd../" = "cd ../";
   };
 
-  home.sessionVariables = {
-    EDITOR = "vim";
-  }
-  // (if gui != null then {
-    # all guis we support run wayland
-    # particularly on phosh, QT apps won't always start unless this env var is set
-    QT_QPA_PLATFORM = "wayland";
-  } else {});
-
 
   home.packages = [
     pkgs.btrfs-progs

helpers/universal/default.nix

@@ -8,5 +8,9 @@
   ];
 
   time.timeZone = "America/Los_Angeles";
+
+  environment.variables = {
+    EDITOR = "vim";
+  };
 }