fix(sub): drive display remarks from the template and split multi-host subpage links

Unify remark generation around the Remark Template. Display contexts (Clients-page QR/Info modals and the HTML sub info page) now render the template name-only client/identity part instead of a hardcoded fallback; the subscription body keeps the full template on a client first link and name-only thereafter. The default template gains the email token so the client email shows by default again (#5532).

BuildPageData now splits each multi-link entry (one link per host of an inbound) into a separate row, so the sub page no longer collapses several host links onto a single mangled line. QR captions on the Clients QR modal and the sub page reuse the link fragment remark.

internal/web/service/setting.go

@@ -55,7 +55,7 @@ var defaultValueMap = map[string]string{
 	"pageSize":                    "25",
 	"expireDiff":                  "0",
 	"trafficDiff":                 "0",
-	"remarkTemplate":              "{{INBOUND}}|📊{{TRAFFIC_LEFT}}|⏳{{DAYS_LEFT}}D",
+	"remarkTemplate":              "{{INBOUND}}-{{EMAIL}}|📊{{TRAFFIC_LEFT}}|⏳{{DAYS_LEFT}}D",
 	"timeLocation":                "Local",
 	"tgBotEnable":                 "false",
 	"tgBotToken":                  "",