Add Frontend 增加一层渐变背景色

frontend/src/pages/Perception/EventFeed.tsx

@@ -64,7 +64,7 @@ export const EventFeed: React.FC<EventFeedProps> = ({
               borderRadius: 10,
               position: 'relative',
               overflow: 'hidden',
-              boxShadow: !isDark ? '0 2px 6px rgba(226,0,116,0.05)' : 'none',
+              boxShadow: 'none',
             }}>
               <div style={{ position: 'absolute', top: 0, left: 0, right: 0, height: 2, background: color }} />
               <div className="mono" style={{ fontSize: 10, color: theme.text3, letterSpacing: '0.5px' }}>{label}</div>
@@ -118,13 +118,13 @@ export const EventFeed: React.FC<EventFeedProps> = ({
               onClick={() => onSelect(evt.id)}
               style={{
                 padding: '14px 16px',
-                background: isSelected ? (isDark ? '#1e1e35' : '#fdf0f7') : theme.bgCard,
+                background: isSelected ? theme.bgHover : theme.bgCard,
                 borderRadius: 10,
                 border: `1px solid ${isSelected ? theme.accent : theme.border}`,
                 borderLeft: `4px solid ${cfg.color}`,
                 cursor: 'pointer',
                 transition: 'all 0.15s ease',
-                boxShadow: isSelected ? `0 0 0 1px ${theme.accent}40` : (!isDark ? '0 1px 4px rgba(0,0,0,0.04)' : 'none'),
+                boxShadow: isSelected ? `0 0 0 1px ${theme.accent}40` : 'none',
               }}
             >
               {/* Source + Status row */}