Redesign HA cards with fill-based backgrounds and add media player

Navigation: arrow keys now always navigate the card grid (removed
left/right value adjustment from Range/Climate cards). Scroll wheel
on the Magic Remote adjusts range values instead.

Cards: 4-column layout with taller (160px) cards. Each card shows a
fill bar proportional to its value — brightness for lights, target
temperature for climate, volume for media. State-based accent colors
(warm yellow for lights, orange/red for heating, blue for cooling,
purple for media playback).

New card type: Media (media_player) — shows artist, track title,
volume fill, and album art placeholder. OK toggles play/pause,
scroll wheel adjusts volume.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ha-home/config.json

@@ -40,7 +40,8 @@
         { "type": "range", "entity_id": "light.rgbic_strip_lights_z2", "name": "LED Strip 2" },
         { "type": "toggle", "entity_id": "light.picture_frame_lamp", "name": "Picture Lamp" },
         { "type": "toggle", "entity_id": "cover.living_room_curtain", "name": "Curtain" },
-        { "type": "vacuum", "entity_id": "vacuum.living_room_roborock_s7_pro_ultra", "name": "Roborock" }
+        { "type": "vacuum", "entity_id": "vacuum.living_room_roborock_s7_pro_ultra", "name": "Roborock" },
+        { "type": "media", "entity_id": "media_player.music_assistant", "name": "Music" }
       ]
     },
     {