fix(wikijs): make sidebar nav targets absolute

The default theme renders sidebar links with href=target verbatim, without
targetType or leading-slash handling. Page targets stored without a leading
slash resolved relatively (e.g. from /betrieb/x, 'Sicherheit' went to
/betrieb/betrieb/sicherheit -> 404), and the home item's empty target was a
dead link. Prefix page targets with '/' and point home at '/'.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/production/wikijs-config.py

@@ -268,8 +268,13 @@ def set_navigation(jwt: str):
     # Admins); die Seiten sind ohnehin per checkAccess für Anwender gesperrt.
     admin = [1, 3]
     def lnk(i, label, icon, path, g=None):
+        # Das Default-Theme rendert den Sidebar-Link wortwörtlich als href=target (ohne
+        # targetType-/Slash-Behandlung). Page-Targets MUESSEN daher absolut sein, sonst
+        # loesen sie relativ auf (von /betrieb/x aus -> /betrieb/<target> -> 404). Wiki.js'
+        # eigener Editor speichert /<locale>/<path>; hier /<path> (namespacing=false), passend
+        # zu allen Inhalts-Links.
         return {"id": i, "kind": "link", "label": label, "icon": icon,
-                "targetType": "page", "target": path,
+                "targetType": "page", "target": "/" + path,
                 "visibilityMode": "restricted" if g else "all", "visibilityGroups": g or []}
     def hdr(i, label, g=None):
         return {"id": i, "kind": "header", "label": label, "icon": "",
@@ -277,7 +282,7 @@ def set_navigation(jwt: str):
                 "visibilityMode": "restricted" if g else "all", "visibilityGroups": g or []}
     items = [
         {"id": "home", "kind": "link", "label": "Startseite", "icon": "mdi-home",
-         "targetType": "home", "target": "", "visibilityMode": "all", "visibilityGroups": []},
+         "targetType": "home", "target": "/", "visibilityMode": "all", "visibilityGroups": []},
         hdr("hanw", "Anwenderdokumentation"),
         lnk("a1", "Registrierung", "mdi-account-plus", "anwender/registrierung"),
         lnk("a2", "Anmelden & Konto", "mdi-login", "anwender/anmelden-und-konto"),