programs: get a semi-working build of chatty (need to set xdg.portal?)

hosts/common/programs/chatty.nix

@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+{
+  sane.programs.chatty = {
+    package = pkgs.chatty.override {
+      # the OAuth feature (presumably used for web-based logins) pulls a full webkitgtk.
+      # especially when using the gtk3 version of evolution-data-server, it's an ancient webkitgtk_4_1.
+      # disable OAuth for a faster build & smaller closure
+      evolution-data-server = pkgs.evolution-data-server.override {
+        enableOAuth2 = false;
+        gnome-online-accounts = pkgs.gnome-online-accounts.override {
+          # disables the upstream "goabackend" feature -- presumably "Google Online Account"?
+          # frees us from webkit_4_1, in turn.
+          enableBackend = false;
+        };
+      };
+    };
+  };
+}

hosts/common/programs/default.nix

@@ -4,6 +4,7 @@
   imports = [
     ./aerc.nix
     ./assorted.nix
+    ./chatty.nix
     ./cozy.nix
     ./epiphany.nix
     ./evince.nix