feat(ssh-terminal): add a duplicate tab action (#1510)

src/ui/shell/TabBar.tsx

@@ -713,7 +713,7 @@ export function TabBar({
               <ActionSlot
                 slotId="tab.menu"
                 when={{ tab: ctxTab, handle: ctxTab.terminalRef?.current }}
-                context={() => [ctxTab.terminalRef?.current]}
+                context={() => [ctxTab.terminalRef?.current, ctxTab]}
                 renderItem={(contribution, invoke) => (
                   <button
                     className="flex items-center gap-2 w-full px-3 py-1.5 text-xs text-left hover:bg-accent hover:text-accent-foreground"