remove vestigial agent-ports.json tcp web-port map

frontend/packages/dashboard/src/tabs.js

@@ -846,8 +846,8 @@ window.marked = marked;
     // When hive-gateway is in front of the dashboard, build same-origin
     // `/agent/<name>/` URLs instead of the direct `http://<host>:<port>/`
     // TCP fallback — the gateway proxies the prefix to the per-agent
-    // harness (TCP via `agent-ports.json` or unix-domain via
-    // `agent-sockets.json`). See
+    // harness (unix-domain via `agent-sockets.json`, or a computed TCP
+    // loopback port while the socket marker is absent). See
     // `docs/web-ui.md::Container row` + `docs/gateway.md::Vhost map`.
     const gatewayLinks = !!(s && s.gateway_enabled);
     // Forge public URL: prefer state.forge_public_url (set by the NixOS