v1.2.1: fix unstyled advisor button (stylesheet install was dropped in the per-session refactor)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@local/omp-advisor",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "oh-my-pi style advisor for DSH: a second model reviews every agent step and injects notes, concerns or blockers.",
   "private": true,
   "type": "module",