WebUI: Cytoscape.js, ELK und cytoscape-elk eingecheckt (#711)

Fuer die Teamuebersicht (Lagebild, #711), auf Freigabe des Nutzers. Als Dateien
im wwwroot statt ueber ein CDN, weil die Zielmaschine womoeglich kein Internet
hat (WebUI-Leitfaden).

- cytoscape 3.34.3 (MIT), elkjs 0.9.3 (EPL-2.0), cytoscape-elk 2.3.0 (MIT)
- aus der npm-Registry, Tarballs gegen dist.integrity (SHA-512) geprueft
- elkjs bewusst 0.9.3: cytoscape-elk 2.3.0 verlangt ^0.9.3
- Lizenztexte daneben, vendor/README.md mit Version, Herkunft und SHA-256

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/ClawdDotNet.Manager.Web/wwwroot/vendor/README.md

@@ -0,0 +1,23 @@
+# Vendored libraries
+
+Third-party files the WebUI ships as-is. They live here instead of being loaded from a CDN
+because the target machine may have no internet access (WebUI-Leitfaden). Do not edit them;
+to update, replace the file and this table together.
+
+Downloaded 2026-09-24 from the npm registry. Each tarball was checked against the
+`dist.integrity` (SHA-512) the registry publishes before extracting.
+
+| Package | Version | File | License | SHA-256 of the file |
+|---|---|---|---|---|
+| [cytoscape](https://www.npmjs.com/package/cytoscape) | 3.34.3 | `cytoscape/cytoscape.min.js` | MIT | `5f3b5b529546d5af1fc5628590af033b74511a5b6f789f5f4682845863228b91` |
+| [elkjs](https://www.npmjs.com/package/elkjs) | 0.9.3 | `elkjs/elk.bundled.js` | EPL-2.0 | `b0745abd7f23cd91690a1587e377edbe19fd7233c783300290936720546216d4` |
+| [cytoscape-elk](https://www.npmjs.com/package/cytoscape-elk) | 2.3.0 | `cytoscape-elk/cytoscape-elk.js` | MIT | `25acbb9dea9b0dc6fef0e79b697547ee56e579f0e1c22ae4353131e72c7e140a` |
+
+**Why elkjs 0.9.3 and not the newest.** cytoscape-elk 2.3.0 declares `elkjs ^0.9.3`. A newer
+elkjs would be untested with the adapter.
+
+**How they are loaded.** All three are UMD bundles and, loaded as classic scripts in this
+order, register the globals `cytoscape`, `ELK` and `cytoscapeElk`. The team overview (#711)
+loads them on demand, so pages that do not draw a graph do not pay for ~2 MB of script.
+
+The license texts sit next to each file.