diff --git a/firmware/cyd_35r/media/media/preview.html b/firmware/cyd_35r/media/media/preview.html
deleted file mode 100644
index 5c7c6e6..0000000
--- a/firmware/cyd_35r/media/media/preview.html
+++ /dev/null
@@ -1,82 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-<meta charset="utf-8" />
-<meta name="viewport" content="width=320" />
-<title>CLIMATE</title>
-<style>
-  *{box-sizing:border-box;margin:0;padding:0}
-  html,body{width:320px;height:240px;overflow:hidden;background:#000;margin:0}
-  .bezel{width:320px;height:240px;background:#1a1408}
-  .screen{
-    width:320px;height:240px;background:#0A1018;color:#F2F5FA;
-    font:12px/1.2 system-ui,sans-serif;position:relative;overflow:hidden;
-  }
-  .hdr{display:flex;align-items:center;gap:8px;padding:4px 8px;height:24px}
-  .hdr b{font-size:14px;font-weight:700}
-  .hdr .up{color:#7E90A8}
-  .hdr .sp{margin-left:auto;display:flex;align-items:center;gap:6px;color:#7E90A8}
-  .led{width:9px;height:9px;border-radius:50%;background:#4CAF7A}
-  .row{display:flex;gap:6px;padding:0 8px}
-  .panel{
-    flex:1;height:118px;background:#121C2A;border:1px solid #1E2C40;
-    border-radius:6px;padding:6px 8px;position:relative;
-  }
-  .cap{color:#7E90A8;font-size:11px}
-  .gauge{
-    width:90px;height:90px;margin:4px auto 0;border-radius:50%;
-    background:conic-gradient(#3DBF8C 0 70%, #243247 0);
-    mask:radial-gradient(farthest-side,transparent 62%,#000 63%);
-    -webkit-mask:radial-gradient(farthest-side,transparent 62%,#000 63%);
-  }
-  .panel.hum .gauge{background:conic-gradient(#3DB8A8 0 55%, #243247 0)}
-  .val{position:absolute;left:0;right:0;top:48px;text-align:center;font-size:24px;font-weight:700}
-  .panel.hum .val{color:#3DB8A8}
-  .panel.temp .val{color:#3DBF8C}
-  .unit{font-size:11px;color:#7E90A8;font-weight:500}
-  .rng{position:absolute;left:0;right:0;bottom:6px;text-align:center;color:#7E90A8;font-size:11px}
-  .bot{
-    margin:6px 8px 0;height:78px;background:#121C2A;border:1px solid #1E2C40;
-    border-radius:6px;display:flex;gap:8px;padding:8px;
-  }
-  .info{width:88px}
-  .ok{color:#E6B84D;font-size:14px;font-weight:700}
-  .bar{margin-top:8px;height:8px;background:#243247;border-radius:4px;overflow:hidden}
-  .bar>i{display:block;height:100%;width:62%;background:#E6B84D}
-  .meta{margin-top:10px;color:#7E90A8;font-size:11px}
-  .chart{flex:1;background:#0E1622;border-radius:4px;position:relative;overflow:hidden}
-  .chart svg{width:100%;height:100%}
-
-/* CYD 3.5" full-bleed: non-uniform scale matches firmware UX()/UY(). */
-html,body{width:480px!important;height:320px!important;overflow:hidden!important;background:#000!important;margin:0!important;padding:0!important}
-.cyd35-scale{width:320px;height:240px;transform:scale(1.5,1.3333333333);transform-origin:0 0;overflow:hidden}
-</style>
-</head>
-<body>
-<div class="cyd35-scale">
-
-<div class="bezel"><div class="screen" id="s">
-  <div class="hdr"><b>CLIMATE</b><span class="up">up 01:24</span>
-    <span class="sp"><span>OK</span><span class="led"></span></span></div>
-  <div class="row">
-    <div class="panel temp"><div class="cap">TEMP</div><div class="gauge"></div>
-      <div class="val">24.6<span class="unit">C</span></div><div class="rng">22.1 / 26.0</div></div>
-    <div class="panel hum"><div class="cap">HUM</div><div class="gauge"></div>
-      <div class="val">48<span class="unit">%</span></div><div class="rng">41 / 55</div></div>
-  </div>
-  <div class="bot">
-    <div class="info"><div class="ok">COMFORT</div><div class="bar"><i></i></div>
-      <div class="meta">DHT11 · GPIO22</div></div>
-    <div class="chart"><svg viewBox="0 0 180 60" preserveAspectRatio="none">
-      <polyline fill="none" stroke="#3DBF8C" stroke-width="2"
-        points="0,40 20,35 40,38 60,28 80,30 100,22 120,26 140,18 160,24 180,20"/>
-      <polyline fill="none" stroke="#3DB8A8" stroke-width="2"
-        points="0,45 20,42 40,44 60,40 80,38 100,36 120,39 140,34 160,37 180,35"/>
-    </svg></div>
-  </div>
-</div></div>
-
-
-</div>
-</body>
-</html>