Refactor signature list item styling

Implement shiny background for signatures and revert gas icon.

src/components/SignatureListItem.tsx

@@ -1,4 +1,3 @@
-
 import { Badge } from "@/components/ui/badge";
 import { Zap, Shield, Coins, HelpCircle, Clock, AlertTriangle, Skull, Fuel, Pickaxe } from "lucide-react";
 import { SigviewRecord as Signature } from "@/lib/pbtypes";
@@ -75,7 +74,7 @@ export const SignatureListItem = ({ signature }: SignatureListItemProps) => {
 				oldEntry ? "opacity-50" : ""
 			} ${
 				isGasSite 
-					? "bg-gradient-to-r from-yellow-900/10 to-amber-900/10 border-l-4 border-l-yellow-500 shadow-lg shadow-yellow-500/10 hover:shadow-yellow-500/20 animate-pulse" 
+					? "bg-gradient-to-r from-yellow-500/20 via-amber-400/20 to-yellow-500/20 border-l-4 border-l-yellow-500 shadow-xl shadow-yellow-500/20 hover:shadow-yellow-500/30 animate-pulse backdrop-blur-sm" 
 					: ""
 			}`}
 		>
@@ -107,11 +106,6 @@ export const SignatureListItem = ({ signature }: SignatureListItemProps) => {
 									DANGEROUS
 								</Badge>
 							)}
-							{isGasSite && (
-								<Badge variant="outline" className="bg-gradient-to-r from-yellow-500/20 to-amber-500/20 text-yellow-300 border-yellow-500 px-1 py-0 text-xs animate-pulse">
-									💎 VALUABLE
-								</Badge>
-							)}
 						</h3>
 					</div>
 				</div>