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.

frontend/src/models/setting.ts

@@ -13,7 +13,7 @@ export class AllSetting {
   pageSize = 25;
   expireDiff = 0;
   trafficDiff = 0;
-  remarkTemplate = '{{INBOUND}}|📊{{TRAFFIC_LEFT}}|⏳{{DAYS_LEFT}}D';
+  remarkTemplate = '{{INBOUND}}-{{EMAIL}}|📊{{TRAFFIC_LEFT}}|⏳{{DAYS_LEFT}}D';
   datepicker: 'gregorian' | 'jalalian' = 'gregorian';
   tgBotEnable = false;
   tgBotToken = '';

frontend/src/pages/clients/ClientQrModal.tsx

@@ -106,7 +106,7 @@ export default function ClientQrModal({
         children: (
           <QrPanel
             value={link}
-            remark={`${client?.email || ''} #${idx + 1}`}
+            remark={parts?.remark || `${client?.email || ''} #${idx + 1}`}
             showQr={!isPostQuantumLink(link)}
           />
         ),

frontend/src/pages/sub/SubPage.tsx

@@ -421,7 +421,7 @@ export default function SubPage() {
                         const parts = parseLinkParts(link);
                         const fallback = `Link ${idx + 1}`;
                         const rowTitle = parts?.remark || fallback;
-                        const qrLabel = [parts?.remark, linkEmails[idx]].filter(Boolean).join('-') || rowTitle;
+                        const qrLabel = parts?.remark || rowTitle;
                         const canQr = !isPostQuantumLink(link);
                         return (
                           <div key={link} className="sub-link-row">