add button for languages setting

app/translations/de/LC_MESSAGES/messages.po

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: tsun-gen3-proxy 0.14.0\n"
 "Report-Msgid-Bugs-To: EMAIL@ADDRESS\n"
-"POT-Creation-Date: 2025-04-20 21:21+0200\n"
+"POT-Creation-Date: 2025-04-27 01:25+0200\n"
 "PO-Revision-Date: 2025-04-18 16:24+0200\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language: de\n"
@@ -19,11 +19,23 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\n"
 "Generated-By: Babel 2.17.0\n"
 
-#: src/web/templates/base.html.j2:27
+#: src/web/i18n.py:7
+msgid "English"
+msgstr "Englisch"
+
+#: src/web/i18n.py:8
+msgid "German"
+msgstr "Deutsch"
+
+#: src/web/i18n.py:9
+msgid "French"
+msgstr "Französisch"
+
+#: src/web/templates/base.html.j2:37
 msgid "Updated:"
 msgstr "Aktualisiert:"
 
-#: src/web/templates/base.html.j2:46
+#: src/web/templates/base.html.j2:58
 msgid "Connections"
 msgstr "Verbindungen"