chore(release): v0.2.6 — Settings UX, empty pool by default, CMF port check

- Settings: "?" help tooltips on every option; router key auto-probes the
  connection right after saving (no more hanging "unavailable")
- Local models card reworked into 3 clear steps (install cortiq → add model →
  run locally); removed the hand-entered .cmf path / pool-id fields — models
  are added via the Import tab and the managed server registers them
- Fresh install ships an EMPTY model pool; the local .cmf is auto-registered by
  the managed CMF server, so it needs no static [[models]] entry
- New: port-availability check — GET /admin/api/cmf/port + "Check port" button
  with next-free-port suggestion. bind()+connect() probe so Docker-proxied /
  dual-stack ports (e.g. 8081) are correctly detected as occupied
- /admin/api/cmf now reports the serving model + port; card shows "▶ serving …"
- On-demand runtime install: POST /admin/api/cmf/install

web/js/api.js

@@ -95,6 +95,11 @@ export const api = {
   // shadow / self-warming loop
   shadow: () => j("GET", "/shadow"),
 
+  // CMF runtime (the `cortiq` CLI that runs the .cmf format)
+  cmfStatus: () => j("GET", "/cmf"),
+  cmfInstall: () => j("POST", "/cmf/install"),
+  cmfPortCheck: (port) => j("GET", "/cmf/port?port=" + encodeURIComponent(port)),
+
   // CMF model factory (HuggingFace → local .cmf)
   hfSearch: (q, limit = 24) =>
     j("GET", `/hf/search?q=${encodeURIComponent(q || "")}&limit=${limit}`),