Add cydweb HTML UI preview for catalog cards.

Co-authored-by: Cursor <cursoragent@cursor.com>

firmware/cyd/media/preview.html

@@ -0,0 +1,47 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<title>KY-009</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:#0A1016;color:#EAF0F6;font:12px/1.2 system-ui,sans-serif;position:relative;overflow:hidden}
+  .muted{color:#7A8B9C}.ok{color:#3DDC97}.bad{color:#E85D4C}.acc{color:#4FC3F7}.amber{color:#FFB74D}
+  .btn{border:0;border-radius:8px;background:#243140;color:#EAF0F6;font-weight:600}
+  .btn.acc{background:#1A4A6E}.btn.on{background:#1B5E4A}.btn.warn{background:#6B3A1E}
+
+
+  .t{position:absolute;left:0;right:0;top:4px;text-align:center;font-size:20px;font-weight:700}
+  .pin{position:absolute;left:0;right:0;top:32px;text-align:center}
+  .st{position:absolute;left:0;right:0;top:52px;text-align:center;font-size:18px;font-weight:700;color:#E85D4C}
+  .rgb{position:absolute;left:24px;right:24px;top:78px;display:flex;gap:8px}
+  .rgb .btn{flex:1;height:40px}
+  .rgb .r{background:#E85D4C}.rgb .g{background:#243140}.rgb .b{background:#243140}
+  .br{position:absolute;left:16px;top:134px}
+  .slider{position:absolute;left:110px;right:16px;top:138px;height:12px;border-radius:4px;background:#243140;overflow:hidden}
+  .slider>i{display:block;height:100%;width:60%;background:#E85D4C}
+  .act{position:absolute;left:24px;right:24px;bottom:10px;height:44px}
+
+</style>
+</head>
+<body>
+<div class="bezel"><div class="screen" id="s">
+
+  <div class="t">KY-009</div>
+  <div class="pin muted">R22 G27 B4</div>
+  <div class="st">RED ON</div>
+  <div class="rgb">
+    <button class="btn r" type="button">R</button>
+    <button class="btn g" type="button">G</button>
+    <button class="btn b" type="button">B</button>
+  </div>
+  <div class="br muted">Brightness 60%</div>
+  <div class="slider"><i></i></div>
+  <button class="btn on act" type="button">Turn OFF</button>
+
+</div></div>
+</body>
+</html>

firmware/cyd/meta.json

@@ -3,5 +3,15 @@
   "name": "CYD KY-009",
   "summary": "KY-009 RGB LED: R=GPIO22 G=GPIO27 B=GPIO4, color switch + PWM brightness",
   "description": "SoftSPI touch + LVGL. One color at a time (R/G/B buttons) + brightness slider + on/off.",
-  "tags": ["ky009", "rgb", "led", "pwm", "touch", "lvgl"]
+  "tags": [
+    "ky009",
+    "rgb",
+    "led",
+    "pwm",
+    "touch",
+    "lvgl"
+  ],
+  "media": {
+    "preview": "media/preview.html"
+  }
 }