Support IPv4 HTTP public gateway entries

frontend/src/locales/en-US.json

@@ -961,13 +961,13 @@
     "publicEntryTitle": "Public entry",
     "publicEntryDesc": "Scheme, host, and port define the public Base URL used by the OIDC issuer, Feishu identity, and tunnel callbacks.",
     "scheme": "Scheme",
-    "host": "Host",
+    "host": "Domain / IPv4 address",
     "port": "Port",
     "publicBase": "Public Base URL",
-    "publicBaseHint": "OIDC issuer is Base URL + /id; tunnel callbacks inherit the same base.",
+    "publicBaseHint": "Generated from scheme, address and port; no input needed. Feishu / OIDC callbacks use this address.",
     "httpRisk": "HTTP is plaintext. Prefer HTTPS in production; HTTP is for intranet or temporary ICP workarounds.",
     "saveEntry": "Save public entry",
-    "hostRequired": "Host is required",
+    "hostRequired": "Enter a domain or IPv4 address",
     "certListTitle": "Certificates",
     "addCert": "Add certificate",
     "replaceCert": "Replace",