ci: enforce reviewed Linux visual regression baselines

.gitea/workflows/ci.yaml

@@ -58,12 +58,12 @@ jobs:
             time pnpm test:coverage --maxWorkers=4
           fi
 
-      # One-time Linux capture, replaced by comparison after artifact review.
+      # Compare against reviewed Linux references; updates are explicit.
       - name: Install UI test browser
         run: pnpm exec playwright install chromium
 
-      - name: Capture Linux UI references
+      - name: Accessibility and UI regression checks
-        run: pnpm test:ui:update
+        run: pnpm test:ui
 
       - name: Upload UI results
         if: always()