subpage: enabled state

Track and surface a subscription's enabled state from backend to frontend so the UI can show inactive subscriptions and use it in active-state logic.

Changes:
- sub/subService.go: track hasEnabledClient, set traffic.Enable, add Enabled to PageData and populate it in BuildPageData.
- sub/subController.go: include enabled in the page context.
- web/html/settings/panel/subscription/subpage.html: emit data-enabled attribute and render an "inactive" tag when disabled.
- web/assets/js/subscription.js: read data-enabled and include it in isActive() checks.

This ensures subscriptions with no enabled clients are marked inactive in the UI and excluded from being considered active.

sub/subController.go

@@ -138,6 +138,7 @@ func (a *SUBController) subs(c *gin.Context) {
 				"host":         page.Host,
 				"base_path":    page.BasePath,
 				"sId":          page.SId,
+				"enabled":      page.Enabled,
 				"download":     page.Download,
 				"upload":       page.Upload,
 				"total":        page.Total,

sub/subService.go

@@ -46,6 +46,7 @@ func (s *SubService) GetSubs(subId string, host string) ([]string, int64, xray.C
 	var result []string
 	var traffic xray.ClientTraffic
 	var lastOnline int64
+	var hasEnabledClient bool
 	var clientTraffics []xray.ClientTraffic
 	inbounds, err := s.getInboundsBySubId(subId)
 	if err != nil {
@@ -78,6 +79,9 @@ func (s *SubService) GetSubs(subId string, host string) ([]string, int64, xray.C
 		}
 		for _, client := range clients {
 			if client.SubID == subId {
+				if client.Enable {
+					hasEnabledClient = true
+				}
 				link := s.getLink(inbound, client.Email)
 				result = append(result, link)
 				ct := s.getClientTraffics(inbound.ClientStats, client.Email)
@@ -111,6 +115,7 @@ func (s *SubService) GetSubs(subId string, host string) ([]string, int64, xray.C
 			}
 		}
 	}
+	traffic.Enable = hasEnabledClient
 	return result, lastOnline, traffic, nil
 }
 
@@ -1304,6 +1309,7 @@ type PageData struct {
 	Host         string
 	BasePath     string
 	SId          string
+	Enabled      bool
 	Download     string
 	Upload       string
 	Total        string
@@ -1453,6 +1459,7 @@ func (s *SubService) BuildPageData(subId string, hostHeader string, traffic xray
 		Host:         hostHeader,
 		BasePath:     basePath,
 		SId:          subId,
+		Enabled:      traffic.Enable,
 		Download:     download,
 		Upload:       upload,
 		Total:        total,