feat: add global theme mode and Yazi shortcut

- Added theme.mode to config.nix for global dark/light mode control.
- Updated Matugen to apply GTK dark mode preferences based on the global theme.
- Added a Hyprland bind (SUPER+X) to launch Yazi via uwsm.

apps/matugen/default.nix

@@ -352,6 +352,15 @@
     platformTheme.name = "gtk";
   };
 
+  dconf.settings = {
+    "org/gnome/desktop/interface" = {
+      color-scheme =
+        if myConfig.theme.mode == "dark"
+        then "prefer-dark"
+        else "prefer-light";
+    };
+  };
+
   # GTK theming with adw-gtk3 and Matugen colors
   gtk = {
     enable = true;
@@ -364,7 +373,19 @@
       package = pkgs.papirus-icon-theme;
     };
     gtk3.extraCss = ''@import url("colors.css");'';
+    gtk3.extraConfig = {
+      gtk-application-prefer-dark-theme =
+        if myConfig.theme.mode == "dark"
+        then 1
+        else 0;
+    };
     gtk4.extraCss = ''@import url("colors.css");'';
+    gtk4.extraConfig = {
+      gtk-application-prefer-dark-theme =
+        if myConfig.theme.mode == "dark"
+        then 1
+        else 0;
+    };
   };
 
   programs.ghostty.settings.theme = "matugen";

apps/yazi/default.nix

@@ -71,6 +71,12 @@
     fi
   '';
 in {
+  wayland.windowManager.hyprland.settings = {
+    bindd = [
+      "SUPER, X, Open File Manager, exec, uwsm app -- yazi"
+    ];
+  };
+
   programs.yazi = {
     enable = true;
     enableFishIntegration = true;

config.nix

@@ -16,6 +16,9 @@
         email = "kenji@hakase";
         defaultBranch = "master";
       };
+      theme = {
+        mode = "dark";
+      };
       terminal = {
         default = "ghostty";
         font = "MonoLisa";
@@ -74,6 +77,9 @@
         email = "kenji@macbook";
         defaultBranch = "master";
       };
+      theme = {
+        mode = "dark";
+      };
       terminal = {
         default = "ghostty";
         font = "MonoLisa";