雷达扫描方向反了：亮边应领先拖尾，把两处 conic-gradient 的亮端翻到 100% (#81)

public/css/screens/room.css

@@ -177,7 +177,9 @@
   border-radius: 50%;
   background:
     repeating-radial-gradient(circle, transparent 0 .2rem, rgba(78, 216, 175, .14) .2rem .21rem),
-    conic-gradient(from 0deg, rgba(23, 249, 183, .2), transparent 25%);
+    /* same geometry as .title-bg__sweep: bright edge at 100% (== 0deg) so it leads the clockwise
+       rotation and the glow trails behind; see the comment in screens/title.css. */
+    conic-gradient(from 0deg, transparent 0 75%, rgba(23, 249, 183, .2) 100%);
   -webkit-mask-image: radial-gradient(circle, #000 60%, transparent 71%);
   mask-image: radial-gradient(circle, #000 60%, transparent 71%);
   animation: radar-sweep 4s linear infinite;

public/css/screens/title.css

@@ -72,7 +72,11 @@
   position: absolute;
   inset: 0;
   border-radius: 50%;
-  background: conic-gradient(from 0deg, rgba(23, 249, 183, .28), rgba(23, 249, 183, 0) 22%, transparent 100%);
+  /* The bright edge must LEAD and the glow must trail BEHIND it. A conic gradient's angle grows
+     clockwise from 0deg (12 o'clock), and radar-sweep rotates clockwise too — so the bright end has
+     to sit at 100% (== 0deg) and fade counter-clockwise from there. Written the other way round
+     (bright at 0% fading to 22%) the glow fans out AHEAD of the beam and the sweep reads backwards. */
+  background: conic-gradient(from 0deg, transparent 0 78%, rgba(23, 249, 183, .28) 100%);
   animation: radar-sweep 6s linear infinite;
 }
 @keyframes radar-sweep { to { transform: rotate(360deg); } }