feat: obsidian-style graph view for wissens-vault

backend/routers/wissen.py

@@ -3,6 +3,7 @@ Wiki in der Zentrale. Bewusst READ-ONLY — geschrieben wird der Vault nur vom T
 (und via Auftragsbuch-Entscheidungen); hier wird nur gelesen und navigiert."""
 
 import os
+import re
 import time
 from pathlib import Path
 
@@ -90,3 +91,60 @@ def read_file(pfad: str) -> dict:
         raise
     except (ValueError, OSError):
         raise HTTPException(404, "Notiz nicht lesbar.")
+
+
+@router.get("/wissen/graph")
+def graph_vault() -> dict:
+    """Obsidian-artiger Graph des Vaults (Nodes = Dateien, Edges = Wiki-Links)."""
+    if not _available():
+        return {"nodes": [], "edges": []}
+    
+    nodes = []
+    edges = []
+    # Für schnelle Link-Auflösung (case-insensitive Name -> relativer Pfad als ID)
+    name_to_id = {}
+    
+    # 1. Alle Nodes sammeln
+    for p in VAULT.rglob("*.md"):
+        if ".git" in p.parts:
+            continue
+        rel = p.relative_to(VAULT).as_posix()
+        name_to_id[p.stem.lower()] = rel
+        
+        # Kategorie aus dem Ordner ableiten
+        cat = "knowledge"
+        parent = p.parent.name if p.parent != VAULT else ""
+        if parent == "traeume":
+            cat = "events"
+        elif parent == "muster":
+            cat = "rules"
+        elif parent == "skill-kandidaten":
+            cat = "identity"
+            
+        nodes.append({
+            "id": rel,
+            "label": p.stem,  # stem ist oft kürzer/prägnanter als der Titel
+            "category": cat
+        })
+        
+    # 2. Edges extrahieren (Wiki-Links [[Name]])
+    link_rx = re.compile(r"\[\[([^\]]+)\]\]")
+    for n in nodes:
+        try:
+            target = VAULT / n["id"]
+            content = target.read_text(encoding="utf-8", errors="replace")
+            # Set, um mehrfache Links auf dieselbe Datei zu entduplizieren
+            found_links = set(m.group(1).strip().lower() for m in link_rx.finditer(content))
+            
+            for link in found_links:
+                target_id = name_to_id.get(link)
+                if target_id and target_id != n["id"]:
+                    edges.append({
+                        "source": n["id"],
+                        "target": target_id,
+                        "weight": 1.0
+                    })
+        except OSError:
+            pass
+            
+    return {"nodes": nodes, "edges": edges}

frontend/src/lib/queries.ts

@@ -172,8 +172,9 @@ export const useGovernor = (refetchInterval: number = TAKT.normal) =>
 export const useMemoryGraph = (enabled = true) =>
   useQuery({
     queryKey: qk.memoryGraph,
-    queryFn: () => api<MemoryGraph>("/api/memory/graph"),
+    queryFn: () => api<MemoryGraph>("/api/wissen/graph"),
     enabled,
+    staleTime: 60 * 1000,
   })
 
 export const useHealth = () =>

frontend/src/views/WissenView.tsx

@@ -1,7 +1,9 @@
 import { useEffect, useMemo, useState } from "react"
 import { Library, FileText, Sparkles, Loader2, FolderOpen, Search } from "lucide-react"
 import { api, type WissenDatei, type WissenFile } from "@/lib/api"
-import { useWissen } from "@/lib/queries"
+import { useWissen, useMemoryGraph } from "@/lib/queries"
+import { GraphView } from "./GraphView"
+import { GraphErrorBoundary } from "./GraphErrorBoundary"
 import { cn } from "@/lib/utils"
 
 // Wissens-Vault: die nächtlichen Traum-Notizen der Box als klickbares Wiki.
@@ -23,6 +25,9 @@ export function WissenView() {
   const [doc, setDoc] = useState<WissenDatei | null>(null)
   const [docLoading, setDocLoading] = useState(false)
   const [q, setQ] = useState("")
+  const [showGraph, setShowGraph] = useState(false)
+  
+  const { data: graphData, isLoading: graphLoading } = useMemoryGraph(showGraph)
 
   const files = useMemo(() => data?.files ?? [], [data])
 
@@ -74,6 +79,7 @@ export function WissenView() {
 
   return (
     <div className="space-y-5">
+      <div className="flex items-center justify-between">
         <div>
           <h1 className="bg-gradient-to-r from-foreground via-foreground to-primary bg-clip-text font-space text-2xl font-bold tracking-tight text-transparent">
             Wissen
@@ -82,6 +88,23 @@ export function WissenView() {
             Was sich die Box nachts erschließt — Traum-Notizen, Muster und Skill-Ideen aus dem Wissens-Vault, verlinkt wie ein Wiki.
           </p>
         </div>
+        {files.length > 0 && (
+          <div className="flex rounded-lg border border-border/60 bg-card p-1">
+            <button
+              onClick={() => setShowGraph(false)}
+              className={cn("rounded-md px-3 py-1.5 text-xs font-medium transition-colors", !showGraph ? "bg-primary text-primary-foreground shadow" : "text-muted-foreground hover:bg-muted")}
+            >
+              Liste
+            </button>
+            <button
+              onClick={() => setShowGraph(true)}
+              className={cn("rounded-md px-3 py-1.5 text-xs font-medium transition-colors", showGraph ? "bg-primary text-primary-foreground shadow" : "text-muted-foreground hover:bg-muted")}
+            >
+              Graph
+            </button>
+          </div>
+        )}
+      </div>
 
       {data && !data.available && (
         <div className="rounded-2xl border border-amber-500/30 bg-amber-500/5 p-4 text-xs text-amber-300">
@@ -101,7 +124,31 @@ export function WissenView() {
         </div>
       )}
 
-      {files.length > 0 && (
+      {showGraph ? (
+        <div className="mc-card flex h-[70vh] flex-col overflow-hidden p-0 relative">
+          {graphLoading && (
+            <div className="absolute inset-0 flex items-center justify-center bg-background/50 z-10">
+              <div className="flex items-center gap-2 rounded-2xl border border-border/60 bg-card p-6 text-xs text-muted-foreground">
+                <Loader2 className="h-4 w-4 animate-spin" /> Graph wird berechnet …
+              </div>
+            </div>
+          )}
+          <GraphErrorBoundary>
+            {graphData && (
+              <GraphView
+                data={graphData}
+                selectedNodeId={active}
+                onNodeSelect={(id) => {
+                  if (id) {
+                    setActive(id)
+                    setShowGraph(false)
+                  }
+                }}
+              />
+            )}
+          </GraphErrorBoundary>
+        </div>
+      ) : files.length > 0 && (
         <div className="flex flex-col gap-4 lg:flex-row">
           {/* Datei-Liste */}
           <aside className="w-full shrink-0 space-y-3 lg:w-72">