feat(hub): trend plan breakeven and stop from monitor fullscreen

Proxy /api/hub/trend/stop and breakeven to instances; enable offset input and actions in hub UI. Add horizontal padding on strategy records page.

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

manual_trading_hub/static/app.css

@@ -1676,6 +1676,7 @@ body.market-chart-fs-open {
   padding: 6px 12px;
   background: var(--plan-be-btn-bg);
   color: var(--accent);
+  border: 1px solid var(--plan-be-input-border);
   border-radius: 8px;
   font-size: 0.78rem;
   text-decoration: none;
@@ -1683,6 +1684,15 @@ body.market-chart-fs-open {
   white-space: nowrap;
 }
 
+.hub-trend-plan-card button.hub-plan-be-btn {
+  font-family: inherit;
+}
+
+.hub-trend-plan-card .hub-plan-be-input:disabled {
+  opacity: 0.55;
+  cursor: not-allowed;
+}
+
 .hub-trend-plan-card .hub-plan-be-btn--static {
   cursor: default;
 }