fix: restore Wissen tab but filter out traeume directory

frontend/src/nav.ts

@@ -3,6 +3,7 @@ import {
   Boxes,
   Inbox,
   History,
+  Library,
   Plug,
   Bot,
   SquareTerminal,
@@ -11,7 +12,7 @@ import {
   type LucideIcon,
 } from "lucide-react"
 
-export type ViewId = "dashboard" | "ideen" | "auftraege" | "skills" | "models" | "chronik" | "connect" | "agent" | "konsole" | "guide"
+export type ViewId = "dashboard" | "ideen" | "auftraege" | "skills" | "models" | "wissen" | "chronik" | "connect" | "agent" | "konsole" | "guide"
 
 export type NavGroup = "Operativ" | "Wissen" | "Werkzeuge" | "Wartung"
 
@@ -34,6 +35,7 @@ export const NAV: NavItem[] = [
   { id: "auftraege", label: "Auftragsbuch", hint: "Vorschläge der Box — annehmen oder ablehnen", icon: Inbox, group: "Operativ" },
   { id: "skills", label: "Skills & Jobs", hint: "Autonome Skills manuell auslösen", icon: Bot, group: "Operativ" },
   { id: "chronik", label: "Chronik", hint: "Was die Box von allein getan hat + Zeitmaschine", icon: History, group: "Operativ" },
+  { id: "wissen", label: "Wissen", hint: "Lucys Wissens-Vault (Traum-Notizen)", icon: Library, group: "Wissen" },
   { id: "connect", label: "Verbinden", hint: "IDE-/Agent-Configs erzeugen", icon: Plug, group: "Werkzeuge" },
   { id: "konsole", label: "Konsole", hint: "Direkte Box-Shell (SSH-artig)", icon: SquareTerminal, group: "Werkzeuge" },
   { id: "guide", label: "Anleitung", hint: "Einrichten & Vibe-Coding", icon: HelpCircle, group: "Werkzeuge" },