hyprland: add hyprspace overview, rebind launcher to Super+R

Loads hyprlandPlugins.hyprspace via the home-manager plugins list and
binds overview:toggle to release-of-Super. Frees Super+Space and moves
wofi to Super+R to match the new gesture.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

settings/hyprland.nix

@@ -57,6 +57,8 @@
         enable = true;
         systemd.variables = [ "--all" ];
 
+        plugins = [ pkgs.hyprlandPlugins.hyprspace ];
+
         settings = {
           monitor = ",preferred,auto,1";
 
@@ -111,11 +113,22 @@
             focus_on_activate = true;
           };
 
+          # Hyprspace overview plugin — see README for full option set
+          plugin.overview = {
+            centerAligned = true;
+            hideTopLayers = true;
+            hideOverlayLayers = true;
+            showNewWorkspace = true;
+            exitOnClick = true;
+            exitOnSwitch = true;
+            dragAlpha = 0.8;
+          };
+
           # Mirror the GNOME bindings so muscle memory carries over
           bind = [
             "$mod, T, exec, $term"
             "$mod, E, exec, nautilus"
-            "$mod, SPACE, exec, $menu"
+            "$mod, R, exec, $menu"
             "$mod, Q, killactive"
             "$mod SHIFT, E, exit"
 
@@ -177,6 +190,15 @@
             "$mod, mouse:273, resizewindow"
           ];
 
+          # Tap Super → Hyprspace overview. Hyprland can't truly distinguish
+          # tap vs. hold on a modifier, so this also fires when releasing
+          # Super after any combo (e.g. Super+T) — the overview will flash
+          # briefly. If that's annoying, switch to a regular combo bind, or
+          # use keyd to remap Super-tap to a dedicated keycode.
+          bindr = [
+            "SUPER, SUPER_L, overview:toggle"
+          ];
+
           bindel = [
             ", XF86AudioRaiseVolume, exec, pamixer -i 5"
             ", XF86AudioLowerVolume, exec, pamixer -d 5"