feat(sub): add dummy info node and status configs for subscriptions (#6412)

* feat(settings): add subInfoNodeEnable and status template settings

* feat(sub): add dummy info node and status configs for raw links

* feat(sub): support dummy info node in clash and json subscriptions

* feat(ui): add subscription info node switch and status templates to settings

* style: apply gofumpt formatting

* fix(sub): address review feedback on subscription info node

- Restore GetSubs contract to avoid unintended remark expansions on non-subscription-body calls.
- Exclude dummy info node from Clash PROXY select group when active server nodes exist.
- Track hasEnabledClient and set traffic.Enable in JSON and Clash paths so status tokens evaluate correctly.
- Deterministically sort client emails across subscriptions before selecting primaryEmail.
- Consolidate duplicated info-node evaluation logic into resolveInfoNodeRemark helper.
- Remove redundant pure-getter test from setting_sub_info_node_test.go.

Co-Authored-By: Claude Code <noreply@anthropic.com>

---------

Co-authored-by: Claude Code <noreply@anthropic.com>

internal/sub/json_service.go

@@ -83,6 +83,7 @@ func (s *SubJsonService) GetJson(subId string, host string, alwaysReturnArray bo
 
 	var header string
 	var hasInactiveExternal bool
+	var hasEnabledClient bool
 
 	seenEmails := make(map[string]struct{})
 	entries := make([]subConfigEntry, 0, len(inbounds))
@@ -99,6 +100,9 @@ func (s *SubJsonService) GetJson(subId string, host string, alwaysReturnArray bo
 
 		var inboundConfigs []json_util.RawMessage
 		for _, client := range clients {
+			if client.Enable {
+				hasEnabledClient = true
+			}
 			seenEmails[client.Email] = struct{}{}
 			inboundConfigs = append(inboundConfigs, s.getConfig(subReq, inbound, client, host)...)
 		}
@@ -128,6 +132,9 @@ func (s *SubJsonService) GetJson(subId string, host string, alwaysReturnArray bo
 		configArray = append(configArray, entry.configs...)
 	}
 	for _, ext := range externalLinks {
+		if ext.Enable {
+			hasEnabledClient = true
+		}
 		if !ext.Active {
 			seenEmails[ext.Email] = struct{}{}
 			hasInactiveExternal = true
@@ -162,8 +169,20 @@ func (s *SubJsonService) GetJson(subId string, host string, alwaysReturnArray bo
 	for e := range seenEmails {
 		emails = append(emails, e)
 	}
+	slices.Sort(emails)
 	traffic, _ := subReq.AggregateTrafficByEmails(emails)
+	traffic.Enable = hasEnabledClient
 	header = fmt.Sprintf("upload=%d; download=%d; total=%d; expire=%d", traffic.Up, traffic.Down, traffic.Total, traffic.ExpiryTime/1000)
+
+	if mode, remark := subReq.resolveInfoNodeRemark(subId, emails, traffic, len(configArray) > 0); mode != infoNodeNone {
+		dummyConfig := s.genDummySocksConfig(remark)
+		if mode == infoNodeExpired || mode == infoNodeDepleted {
+			configArray = []json_util.RawMessage{dummyConfig}
+		} else {
+			configArray = append([]json_util.RawMessage{dummyConfig}, configArray...)
+		}
+	}
+
 	if len(configArray) == 0 {
 		return "", header, nil
 	}
@@ -962,6 +981,32 @@ func (s *SubJsonService) genWireguard(inbound *model.Inbound, client model.Clien
 	return result
 }
 
+func (s *SubJsonService) genDummySocksConfig(remark string) json_util.RawMessage {
+	outbound := map[string]any{
+		"protocol": "socks",
+		"tag":      "proxy",
+		"settings": map[string]any{
+			"servers": []any{
+				map[string]any{
+					"address": "127.0.0.1",
+					"port":    1080,
+				},
+			},
+		},
+	}
+	rawOutbound, _ := json.Marshal(outbound)
+	newOutbounds := []json_util.RawMessage{rawOutbound}
+	newOutbounds = append(newOutbounds, s.defaultOutbounds...)
+
+	newConfigJson := make(map[string]any)
+	maps.Copy(newConfigJson, s.configJson)
+	newConfigJson["outbounds"] = newOutbounds
+	newConfigJson["remarks"] = remark
+
+	newConfig, _ := json.MarshalIndent(newConfigJson, "", "  ")
+	return newConfig
+}
+
 func mergeFinalMask(base any, extra map[string]any) map[string]any {
 	merged := map[string]any{}
 	if baseMap, ok := base.(map[string]any); ok {