Implement version check on load, if the footer has data-update-check=true,it fetches /api/version and sets the version badge. No request is made when update check is disabled.

internal/locales/de.json

@@ -390,6 +390,9 @@
     "auth.logout": "Abmelden",
     "auth.user_info": "Benutzerinformationen",
     "auth.session_expired": "Ihre Sitzung ist abgelaufen. Bitte melden Sie sich erneut an.",
-    "auth.login_required": "Authentifizierung erforderlich"
+    "auth.login_required": "Authentifizierung erforderlich",
+    "footer.version": "Fail2ban-UI v{version}",
+    "footer.latest": "Aktuell",
+    "footer.update_available": "Update verfügbar: v{version}"
   }
   

internal/locales/de_ch.json

@@ -390,6 +390,9 @@
     "auth.logout": "Abmäudä",
     "auth.user_info": "Benutzerinformationä",
     "auth.session_expired": "Ihri Sitzig isch abglaufä. Bitte mäudä di erneut a.",
-    "auth.login_required": "Authentifizierig erforderlich"
+    "auth.login_required": "Authentifizierig erforderlich",
+    "footer.version": "Fail2ban-UI v{version}",
+    "footer.latest": "Aktuell",
+    "footer.update_available": "Update verfüegbar: v{version}"
   }
   

internal/locales/en.json

@@ -390,6 +390,9 @@
     "auth.logout": "Logout",
     "auth.user_info": "User Information",
     "auth.session_expired": "Your session has expired. Please log in again.",
-    "auth.login_required": "Authentication required"
+    "auth.login_required": "Authentication required",
+    "footer.version": "Fail2ban-UI v{version}",
+    "footer.latest": "Latest",
+    "footer.update_available": "Update available: v{version}"
   }
   

internal/locales/es.json

@@ -390,5 +390,8 @@
     "auth.logout": "Cerrar sesión",
     "auth.user_info": "Información del usuario",
     "auth.session_expired": "Su sesión ha expirado. Por favor, inicie sesión nuevamente.",
-    "auth.login_required": "Autenticación requerida"
+    "auth.login_required": "Autenticación requerida",
+    "footer.version": "Fail2ban-UI v{version}",
+    "footer.latest": "Actual",
+    "footer.update_available": "Actualización disponible: v{version}"
   }

internal/locales/fr.json

@@ -390,5 +390,8 @@
   "auth.logout": "Déconnexion",
   "auth.user_info": "Informations utilisateur",
   "auth.session_expired": "Votre session a expiré. Veuillez vous reconnecter.",
-  "auth.login_required": "Authentification requise"
+  "auth.login_required": "Authentification requise",
+  "footer.version": "Fail2ban-UI v{version}",
+  "footer.latest": "À jour",
+  "footer.update_available": "Mise à jour disponible : v{version}"
 }

internal/locales/it.json

@@ -390,5 +390,8 @@
   "auth.logout": "Esci",
   "auth.user_info": "Informazioni utente",
   "auth.session_expired": "La tua sessione è scaduta. Si prega di accedere nuovamente.",
-  "auth.login_required": "Autenticazione richiesta"
+  "auth.login_required": "Autenticazione richiesta",
+  "footer.version": "Fail2ban-UI v{version}",
+  "footer.latest": "Aggiornato",
+  "footer.update_available": "Aggiornamento disponibile: v{version}"
 }

internal/version/version.go

@@ -0,0 +1,20 @@
+// Fail2ban UI - A Swiss made, management interface for Fail2ban.
+//
+// Copyright (C) 2025 Swissmakers GmbH (https://swissmakers.ch)
+//
+// Licensed under the GNU General Public License, Version 3 (GPL-3.0)
+// You may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package version
+
+// Version is the current Fail2ban-UI version (in best case it matches the latest release tag on GitHub).
+const Version = "1.3.6"