ui: add Top20 button to market chart fullscreen toolbar

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/static/app.css

@@ -2800,6 +2800,10 @@ body.login-page {
   display: none;
 }
 
+.market-fs-field.market-field-symbol .market-symbol-wrap {
+  min-width: 180px;
+}
+
 .market-fs-field span {
   font-size: 0.68rem;
   color: var(--muted);
@@ -2966,8 +2970,16 @@ body.login-page {
   color: var(--accent);
 }
 
-.market-vol-rank-sheet {
+.market-vol-rank-anchor {
   margin: -6px 0 12px;
+}
+
+.market-vol-rank-anchor:empty,
+.market-vol-rank-anchor-fs:empty {
+  display: none;
+}
+
+.market-vol-rank-sheet {
   padding: 10px 12px 8px;
   border: 1px solid var(--border-soft);
   border-radius: var(--radius);
@@ -2975,6 +2987,18 @@ body.login-page {
   box-shadow: var(--glow);
 }
 
+.market-chart-wrap .market-vol-rank-sheet {
+  margin: 0;
+  border-radius: 0;
+  border-left: none;
+  border-right: none;
+  box-shadow: none;
+}
+
+.market-chart-wrap.is-fullscreen .market-vol-rank-sheet {
+  background: var(--chart-bar-bg);
+}
+
 .market-vol-rank-sheet.hidden {
   display: none;
 }