feat(hass): hide remote if unavailable

devices/homie/modules/home-assistant/frontend.nix

@@ -2,10 +2,12 @@
   caule-themes-src,
   dracul-ha-src,
   material-rounded-theme-src,
+  lib,
   pkgs,
   self,
   ...
 }: let
+  inherit (lib) singleton;
   inherit (pkgs.writers) writeYAML;
 in {
   services.home-assistant = {
@@ -109,20 +111,18 @@ in {
 
     config.template = [
       {
-        sensor = [
-          {
+        sensor = singleton {
           name = "Material Rounded Base Color Matt";
           unique_id = "material_rounded_base_color_matt";
           state = ''{{ states("sensor.pixel_8_accent_color") }}'';
-          }
-        ];
+        };
       }
     ];
 
     lovelaceConfig = {
       title = "Our House";
-      views = [
-        {
+      # I don't want multiple views
+      views = singleton {
         path = "home";
         title = "Home";
         cards = [
@@ -145,6 +145,12 @@ in {
           {
             type = "custom:android-tv-card";
 
+            visibility = singleton {
+              condition = "state";
+              entity = "remote.onn_4k_streaming_box";
+              state_not = ["unavailable" "unknown"];
+            };
+
             media_player_id = "media_player.living_room_speaker";
             keyboard_id = "remote.android_tv_192_168_0_106";
             remote_id = "remote.onn_4k_streaming_box";
@@ -302,8 +308,7 @@ in {
             '';
           }
         ];
-        }
-      ];
+      };
     };
 
     config.lovelace.dashboards = {