feat: per-credential visibility control for plugin credentials (#35468)

Co-authored-by: Yang <yang@Yangs-MacBook-Pro.local>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -259,3 +259,6 @@ scripts/stress-test/reports/
 .qoder/*
 .context/
 .eslintcache
+
+# Vitest local reports
+web/.vitest-reports/