fix(#3312): require static frontend evidence before ui-plan-gate blocks (#3451)

* fix(#3312): require static frontend evidence before ui-plan-gate blocks

* fix(#3312): fill changeset pr reference

* fix(#3312): align regression assertions with section heading and legacy artifact shape

---------

Co-authored-by: sim <sim@local>

docs/INVENTORY-MANIFEST.json

@@ -504,6 +504,7 @@
       "uat-predicate.cjs",
       "uat.cjs",
       "ui-consideration-probe.cjs",
+      "ui-frontend-evidence.cjs",
       "ui-safety-gate.cjs",
       "unusable-input.cjs",
       "update-context.cjs",