Merge pull request #1927 from Molecule-AI/feat/ci/e2e-canvas-staging-trigger

feat(ci): run E2E Staging Canvas on staging branch pushes

.github/workflows/e2e-staging-canvas.yml

@@ -5,18 +5,21 @@ name: E2E Staging Canvas (Playwright)
 # e2e-staging-saas.yml (which tests the API shape) by exercising the
 # actual browser + canvas bundle against live staging.
 #
-# Triggers: push to main or PR touching canvas sources + this workflow,
+# Triggers: push to main/staging or PR touching canvas sources + this workflow,
 # manual dispatch, and weekly cron to catch browser/runtime drift even
 # when canvas is quiet.
+# Added staging to push/pull_request branches so the auto-promote gate
+# check (--event push --branch staging) can see a completed run for this
+# workflow — mirrors what PR #1891 does for e2e-api.yml.
 
 on:
   push:
-    branches: [main]
+    branches: [main, staging]
     paths:
       - 'canvas/**'
       - '.github/workflows/e2e-staging-canvas.yml'
   pull_request:
-    branches: [main]
+    branches: [main, staging]
     paths:
       - 'canvas/**'
       - '.github/workflows/e2e-staging-canvas.yml'