feat(app): show the connection in use on host switcher rows

The old marker only ever tagged the local host as "Local" based on its
server id. Each row now shows the connection actually in use, inline
after the host name — the TCP or relay endpoint (default :443/:80
stripped), or "Local" for socket/pipe transports.

packages/app/src/components/left-sidebar.tsx

@@ -290,10 +290,6 @@ function sidebarHostOptionTestID(serverId: string): string {
   return `sidebar-host-row-${serverId}`;
 }
 
-function sidebarHostLocalMarkerTestID(serverId: string): string {
-  return `sidebar-host-local-marker-${serverId}`;
-}
-
 function FooterIconButton({
   buttonRef,
   onPress,
@@ -365,13 +361,12 @@ function SidebarHostPicker({
       anchorRef={triggerRef}
       includeAddHost
       onAddHost={onAddHost}
-      showLocalMarker
+      showActiveConnection
       onOpenHostSettings={onOpenHostSettings}
       searchable
       desktopMinWidth={240}
       addHostTestID="sidebar-host-add"
       hostOptionTestID={sidebarHostOptionTestID}
-      hostLocalMarkerTestID={sidebarHostLocalMarkerTestID}
     >
       <FooterIconButton
         buttonRef={triggerRef}