feat: switch to swayfx and employ autotiling-rs

hosts/alice/sway.nix

@@ -1,5 +1,8 @@
 {pkgs, ...}: {
-  programs.sway.enable = true;
+  programs.sway = {
+    enable = true;
+    package = pkgs.swayfx.overrideAttrs (_: {passthru.providedSessions = ["sway"];});
+  };
 
   xdg.portal = {
     enable = true;

users/buffet/sway.nix

@@ -8,6 +8,7 @@ in {
   home-manager.users.buffet = {
     wayland.windowManager.sway = {
       enable = true;
+      package = pkgs.swayfx.overrideAttrs (_: {passthru.providedSessions = ["sway"];});
       systemd.enable = true;
       wrapperFeatures.gtk = true;
 
@@ -182,6 +183,10 @@ in {
       extraConfig = ''
         for_window [title="."] title_format ""
         for_window [title="^oyster$"] floating enable
+
+        corner_radius 8
+        smart_corner_radius enable
+        shadows enable
       '';
     };
 
@@ -206,5 +211,21 @@ in {
         ring-wrong-color = bright.white;
       };
     };
+
+    systemd.user.services = {
+      autotile-rs = {
+        Unit = {
+          Description = "Autotiling for sway (and possibly i3)";
+        };
+
+        Service = {
+          ExecStart = "${pkgs.autotiling-rs}/bin/autotiling-rs";
+        };
+
+        Install = {
+          WantedBy = ["sway-session.target"];
+        };
+      };
+    };
   };
 }