fix: distinguish partial vessel snapshots from stale data

src/ui/styles/layers.css

@@ -1298,6 +1298,7 @@
       .feed-loading,
       .feed-degraded,
       .feed-stale,
+      .feed-partial,
       .feed-fallback,
       .feed-unavailable
     )

src/ui/styles/radio.css

@@ -666,6 +666,7 @@
 .data-toggle-btn.feed-loading,
 .data-toggle-btn.feed-degraded,
 .data-toggle-btn.feed-stale,
+.data-toggle-btn.feed-partial,
 .data-toggle-btn.feed-fallback,
 .data-toggle-btn.feed-unavailable {
   min-width: 82px;
@@ -685,6 +686,7 @@
 }
 
 .data-toggle-btn.active.feed-stale,
+.data-toggle-btn.active.feed-partial,
 .data-toggle-btn.active.feed-fallback {
   color: #ffd27a;
   border-color: rgba(255, 190, 82, 0.75);