Merge branch 'main' into ui-refactor

client/internal/routemanager/manager.go

@@ -716,6 +716,8 @@ func resolveURLsToIPs(urls []string) []net.IP {
 // RouteSelector stores routes with default-on semantics, so without this every
 // available exit node would report selected at once.
 func (m *DefaultManager) updateRouteSelectorFromManagement(clientRoutes route.HAMap) {
+	m.mirrorV6ExitPairSelections(clientRoutes)
+
 	// An explicit user "deselect all" must not be overridden by management auto-apply.
 	// Auto-applying an exit node here would call SelectRoutes, which clears the
 	// deselect-all flag and re-enables every route the user turned off.
@@ -733,6 +735,24 @@ func (m *DefaultManager) updateRouteSelectorFromManagement(clientRoutes route.HA
 	m.logExitNodeUpdate(info, preferred)
 }
 
+// mirrorV6ExitPairSelections keeps every synthesized "-v6" exit route's selection
+// consistent with its v4 base. The v4/v6 exit pair is a single toggle, so the v6
+// entry always follows the base: deselecting the v4 exit node also drops its ::/0
+// pair, and any stale (orphaned) explicit selection on the v6 entry is reset. This
+// runs before selection is read so both collectExitNodeInfo and FilterSelectedExitNodes
+// see consistent state, including pairs loaded from persisted selector state.
+func (m *DefaultManager) mirrorV6ExitPairSelections(clientRoutes route.HAMap) {
+	routesByNetID := make(map[route.NetID][]*route.Route, len(clientRoutes))
+	for haID, routes := range clientRoutes {
+		routesByNetID[haID.NetID()] = routes
+	}
+
+	for v6ID := range route.V6ExitMergeSet(routesByNetID) {
+		baseID := route.NetID(strings.TrimSuffix(string(v6ID), route.V6ExitSuffix))
+		m.routeSelector.SyncPairedSelection(baseID, v6ID)
+	}
+}
+
 type exitNodeInfo struct {
 	allIDs               []route.NetID
 	selectedByManagement []route.NetID