chore(frontend): drop unused logs.connCount locale keys

Remove dead connection-count copy left after retention card cleanup.

frontend/src/locales/en-US.json

@@ -584,7 +584,6 @@
     "eventType": "Event Type",
     "tunnelId": "Tunnel ID",
     "auditCount": "Audit Logs",
-    "connCount": "Connection Logs",
     "sessionCount": "Sessions",
     "from": "From",
     "cleanup": "Cleanup Logs",
@@ -793,6 +792,7 @@
     "localId": "Local ID",
     "remoteId": "Remote ID",
     "phase2": "Phase 2 (IPSec SA)",
+    "advancedOptions": "Advanced settings · IKE / ESP",
     "espProposal": "ESP Proposal",
     "pfsGroup": "PFS Group",
     "dpdPolicy": "DPD Policy",