feat(webui): tree view, interactive graph, URL-routed filters

cmd/mind-map/main.go

@@ -281,6 +281,15 @@ func runHTTPServer(addr, dir, webuiDir string, idleTimeout time.Duration, stopCh
 		jsonResponse(rw, backlinks)
 	})
 
+	mux.HandleFunc("GET /api/links", func(rw http.ResponseWriter, r *http.Request) {
+		links, err := w.AllLinks(r.Context())
+		if err != nil {
+			http.Error(rw, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		jsonResponse(rw, links)
+	})
+
 	// Settings API endpoints (UI only, not MCP)
 	mux.HandleFunc("GET /api/settings", func(rw http.ResponseWriter, r *http.Request) {
 		current, err := config.Load(cfgPath)

internal/wiki/pages.go

@@ -325,6 +325,37 @@ func (w *Wiki) GetBacklinks(ctx context.Context, pagePath string) ([]string, err
 	return w.getBacklinks(ctx, pagePath)
 }
 
+// Link is a single source→target edge between two pages.
+type Link struct {
+	Source string `json:"source"`
+	Target string `json:"target"`
+}
+
+// AllLinks returns every wikilink edge in the index. Used by the graph
+// view to render reference edges without a per-page round-trip.
+func (w *Wiki) AllLinks(ctx context.Context) ([]Link, error) {
+	if err := ctx.Err(); err != nil {
+		return nil, err
+	}
+
+	rows, err := w.db.QueryContext(ctx, "SELECT source, target FROM links")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var links []Link
+	for rows.Next() {
+		var l Link
+		if err := rows.Scan(&l.Source, &l.Target); err != nil {
+			slog.Warn("all links scan error", slog.Any("error", err))
+			continue
+		}
+		links = append(links, l)
+	}
+	return links, nil
+}
+
 // Context returns a WikiContext overview.
 func (w *Wiki) Context(ctx context.Context) (*WikiContext, error) {
 	if err := ctx.Err(); err != nil {

webui/package.json

@@ -4,6 +4,7 @@
     "dev": "webpack --mode development --config webpack.config.js --watch"
   },
   "dependencies": {
+    "force-graph": "^1.51.4",
     "marked": "^15.0.0",
     "mermaid": "^11.14.0",
     "preact": "^10.25.0"