fix(tv): lengthen the top fade on the TV halo

The warm halo was painted on the section's own background with its core at 8%
from the top. The top edge therefore fell at 0.15 of the gradient's vertical
radius — where the ramp still carries ~77% of peak alpha — and the browser cut
it flat, drawing a straight amber-on-black line across the full width. It read
as one solid block sitting on another.

No arrangement of colour stops fixes this while the gradient is confined to the
section: with the core near the top, the top edge is always near the core, so
the choice is a cut edge or a halo dimmed to nothing.

Move it to its own layer extended 220px above the section instead. The falloff
now happens off-stage and reaches zero 174px before the section starts, so
there is no edge to see. Alpha at the section's own top edge is unchanged at
~0.10 — this lengthens the fade, it does not dim the halo.

`-z-10` because an absolutely positioned layer otherwise paints above in-flow
content and would wash over the set itself; it matches the page ground's own
-z-10 and composites above it. Verified in dark and light, 390 and 1400.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: sktbrd

src/components/tv/GnarsTVSet.tsx

@@ -438,17 +438,40 @@ export function GnarsTVSet({ channels, ticker }: GnarsTVSetProps) {
   if (!active) return null;
 
   return (
-    <section
-      className="flex w-full flex-col items-center px-5 pb-14 pt-8"
-      style={{
-        // Transparent to the page ground. The set is a physical object and
-        // carries its own dark chassis; the opaque near-black behind it was
-        // invisible on a dark page and read as a stray black rectangle on a
-        // light one. The warm glow stays — it is a halo around the object, and
-        // it composites over either ground.
-        background: "radial-gradient(70% 55% at 50% 8%,rgba(245,158,11,.13),rgba(0,0,0,0) 62%)",
-      }}
-    >
+    <section className="relative flex w-full flex-col items-center px-5 pb-14 pt-8">
+      {/* The warm halo around the set.
+          Transparent to the page ground: the set is a physical object and
+          carries its own dark chassis; the opaque near-black behind it was
+          invisible on a dark page and read as a stray black rectangle on a
+          light one. The glow composites over either ground.
+
+          It lives on its own layer, extended 220px ABOVE the section, because
+          the halo's core sits near the top of the set — so on the section's own
+          box the top edge fell at 0.15 of the gradient radius, where the ramp
+          still carries ~77% of peak alpha, and the browser cut it flat. That
+          straight amber-on-black line across the full width was the "hard block
+          on top of another" it read as.
+
+          Extending the box upward moves the falloff off-stage: the ramp now
+          reaches zero 174px above the section starts, so there is no edge to
+          see. Intensity at the section's own top edge is unchanged — this
+          lengthens the fade, it does not dim the halo.
+
+          `-z-10` rather than a later sibling: an absolutely positioned element
+          paints above in-flow content, so without it the halo would wash over
+          the set itself. It matches the page ground's own `-z-10` layer and so
+          composites above that and below everything else. */}
+      <div
+        aria-hidden
+        className="pointer-events-none absolute inset-x-0 bottom-0 -z-10"
+        style={{
+          // Inline, not `-top-[220px]`: that arbitrary utility did not generate,
+          // leaving `top` at its static position and collapsing this layer to
+          // zero height. Every other bespoke value in this file is inline too.
+          top: -220,
+          background: "radial-gradient(70% 44% at 50% 26%,rgba(245,158,11,.13),rgba(0,0,0,0) 62%)",
+        }}
+      />
       {/* The only text outside the chassis, so it is the only thing here that
           sits on the page ground. Now that the section is transparent, the
           chassis gold it used to share would be 79% luminance on white — the