feat: add page shell, preferences and translations

Base layout with top bar, role-based menu, profile menu and phone layout; theme, language and German form of address kept in cookies; German formal, German informal and English text; Fluent avatar bundled in the image by a Node build stage; placeholder pages for the Publisher and Admin groups.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N3t4WL7bd9bdHHNjEsxzqC

portal/locale/de/LC_MESSAGES/django.po

@@ -0,0 +1,109 @@
+# German, formal address (Sie)
+msgid ""
+msgstr ""
+"Project-Id-Version: self-service-portal\n"
+"Language: de\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+msgid "No permission"
+msgstr "Keine Berechtigung"
+
+msgid "You do not have permission to open this page."
+msgstr "Dazu fehlt Ihnen die Berechtigung."
+
+msgid "Back to the portal"
+msgstr "Zurück zum Portal"
+
+msgid "Home"
+msgstr "Startseite"
+
+#, python-format
+msgid "Hello, %(name)s"
+msgstr "Guten Tag, %(name)s"
+
+msgid "You are signed in. More pages will follow here."
+msgstr "Sie sind angemeldet. Weitere Seiten folgen hier."
+
+msgid "Sign-in not possible"
+msgstr "Anmeldung nicht möglich"
+
+msgid "You cannot sign in to the portal with this account. If you think this is a mistake, contact your administrator."
+msgstr "Mit diesem Konto können Sie sich nicht am Portal anmelden. Wenn Sie glauben, dass das ein Fehler ist, wenden Sie sich an die Administration."
+
+msgid "Try again"
+msgstr "Erneut versuchen"
+
+msgid "Signed out"
+msgstr "Abgemeldet"
+
+msgid "You have been signed out"
+msgstr "Sie wurden abgemeldet."
+
+msgid "Sign in again"
+msgstr "Erneut anmelden"
+
+msgid "Not available"
+msgstr "Nicht verfügbar"
+
+msgid "This is not possible right now. Please try again later."
+msgstr "Das ist gerade nicht möglich. Bitte versuchen Sie es später erneut."
+
+msgid "Skip to content"
+msgstr "Zum Inhalt springen"
+
+msgid "Menu"
+msgstr "Menü"
+
+msgid "Profile menu"
+msgstr "Profilmenü"
+
+msgid "Main menu"
+msgstr "Hauptmenü"
+
+msgid "Theme"
+msgstr "Design"
+
+msgid "Language"
+msgstr "Sprache"
+
+msgid "Form of address"
+msgstr "Anrede"
+
+msgid "Sign out"
+msgstr "Abmelden"
+
+msgid "This page is not available yet."
+msgstr "Diese Seite folgt."
+
+msgid "Light"
+msgstr "Hell"
+
+msgid "Dark"
+msgstr "Dunkel"
+
+msgid "System"
+msgstr "System"
+
+msgid "Publishing"
+msgstr "Veröffentlichen"
+
+msgid "Manage announcements"
+msgstr "Ankündigungen verwalten"
+
+msgid "Administration"
+msgstr "Administration"
+
+msgid "Appearance"
+msgstr "Darstellung"
+
+msgid "Settings"
+msgstr "Einstellungen"
+
+msgid "Audit log"
+msgstr "Protokoll"
+
+msgid "Status"
+msgstr "Status"