fix(i18n): align PBS fields and omit duplicate English errors

AppImage/messages/en/common.json

@@ -14,7 +14,7 @@
     "signInWith": "Sign in with",
     "methodPassword": "User and password",
     "methodToken": "API token",
-    "username": "User (user@realm)",
+    "username": "User",
     "password": "Password",
     "passwordHelp": "The password is used once to create a read-only API token (Audit role) for this Monitor. Only that token is saved, never the password. Enable Monitor authentication first.",
     "cancel": "Cancel",
@@ -27,10 +27,15 @@
     "editConnection": "Connection to edit",
     "add": "Add a new connection",
     "name": "Name",
-    "url": "HTTPS URL (include :8007 for the native PBS port)",
-    "token_id": "API token ID (user@realm!token)",
-    "token_secret": "API token secret (leave empty to keep the stored secret)",
-    "fingerprint": "SHA256 certificate fingerprint (optional)",
+    "url": "HTTPS address",
+    "urlHelp": "Include :8007 for the default PBS port, for example https://pbs.example:8007.",
+    "usernameHelp": "Use user@realm, for example root@pam.",
+    "tokenIdHelp": "Use user@realm!token, for example monitor@pbs!proxmenux.",
+    "tokenSecretHelp": "Enter the secret of this API token.",
+    "tokenSecretKeepHelp": "Leave empty to keep the saved token secret.",
+    "token_id": "API token ID",
+    "token_secret": "API token secret",
+    "fingerprint": "SHA256 fingerprint (optional)",
     "tlsHelp": "Leave the fingerprint empty for normal CA and hostname verification. For a self-signed certificate, copy its SHA256 fingerprint from the PBS console or another trusted channel. The pin is checked before sending credentials.",
     "saved": "PBS connection verified and saved.",
     "saveFailed": "Could not save the PBS connection.",