fix(l10n): one term for capabilities, plain federation language

- 'Fähigkeiten' is the German lead term everywhere (welcome step 2,
  integrations panel, federation) — English jargon only as a
  parenthesized technical term on first mention
- 'Enrollment-Token' -> 'Registrierungs-Token', bootstrap label in
  plain words, CA spelled out, enrollment hint now formal address
- formality guard also rejects reader-addressed imperatives

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

test/l10n_formality_test.dart

@@ -18,10 +18,15 @@ void main() {
     // Pronouns + possessives + common 2nd-person-singular verb
     // forms. Word-bounded so "individuell" or "Bedingungen"
     // never match.
+    // Also catches reader-addressed imperatives ("Übergib …",
+    // "Wähle …"). Only unambiguous ones — forms that double as
+    // the app's first-person progress voice ("Starte …") or as
+    // nouns ("Versuche") stay out.
     final informal = RegExp(
       r"\b(du|dich|dir|dein|deine|deiner|deinem|deinen|deins|"
       r"brauchst|tippst|willst|kannst|hast|bist|machst|siehst|"
-      r"klickst|wählst|öffnest|startest|versuchst|versuch's)\b",
+      r"klickst|wählst|öffnest|startest|versuchst|versuch's|"
+      r"übergib|wähle|klicke|tippe)\b",
       caseSensitive: false,
     );
     final offenders = <String>[];