refactor(waybar): store rendered window icons

configs/nixos/modules/desktop/apps/firefox.nix

@@ -28,7 +28,7 @@ in
   config = lib.mkIf cfg.enable {
     registry.window-icon.${config.networking.hostName}.firefox = {
       class = ".*[Ff]irefox.*";
-      icon = "f269";
+      icon = builtins.fromJSON ''"\uf269"'';
     };
 
     home-manager.users.${config.user.name} = hm: {

configs/nixos/modules/desktop/apps/ghostty.nix

@@ -22,7 +22,7 @@ in
 
     registry.window-icon.${config.networking.hostName}.ghostty = {
       class = "com.mitchellh.ghostty";
-      icon = "f120";
+      icon = builtins.fromJSON ''"\uf120"'';
     };
 
     home-manager.users.${user}.home.packages = [ pkgs.ghostty ];

configs/nixos/modules/desktop/apps/obsidian.nix

@@ -17,7 +17,7 @@ in
 
     registry.window-icon.${config.networking.hostName}.obsidian = {
       class = "obsidian";
-      icon = "f02d";
+      icon = builtins.fromJSON ''"\uf02d"'';
     };
   };
 }

configs/nixos/modules/desktop/apps/signal.nix

@@ -16,7 +16,7 @@ in
 
     registry.window-icon.${config.networking.hostName}.signal = {
       class = "[Ss]ignal";
-      icon = "f4ad";
+      icon = builtins.fromJSON ''"\uf4ad"'';
     };
   };
 }

configs/nixos/modules/desktop/apps/steam.nix

@@ -26,7 +26,7 @@
 
     registry.window-icon.${config.networking.hostName}.steam = {
       class = "[Ss]team";
-      icon = "f1b6";
+      icon = builtins.fromJSON ''"\uf1b6"'';
     };
   };
 }

configs/nixos/modules/desktop/apps/vencord.nix

@@ -17,7 +17,7 @@ in
 
     registry.window-icon.${config.networking.hostName}.vesktop = {
       class = "[Vv]esktop";
-      icon = "f1ff";
+      icon = builtins.fromJSON ''"\uf1ff"'';
     };
   };
 }