test(web): query core credential actions by name

[lyzno1]

Summary

• Query the core plugin credential Delete, Rename, and Edit flows by role and accessible name instead of SVG class, button order, or generic icon traversal.
• Remove conditional branches that allowed those tests to pass without finding or activating the intended action.
• Keep this PR test-only and scoped to the primary confirmation, rename, edit modal, close, and remove flows.

Behavior contract

• Delete tests must activate Delete and observe the confirmation, cancellation, mutation, notification, and update callback paths.
• Rename tests must activate Rename and observe the textbox, save mutation, notification, and update callback paths.
• Edit tests must activate Edit and observe the modal open, close/reset, and remove-to-confirmation paths.
• This PR depends on fix(web): name plugin credential actions #40265, which supplies the accessible names used by these locators.

Visual regression

This is a test-only PR. It has no production bundle, DOM, CSS, layout, interaction, or runtime visual effect.

Validation

• pnpm exec vp check app/components/plugins/plugin-auth/authorized/tests/index.spec.tsx (0 errors, 0 warnings)
• pnpm exec vp test run app/components/plugins/plugin-auth/authorized/tests/index.spec.tsx (62/62)
• pnpm check (0 errors, 2059 existing warnings)
• git diff codex/a11y-plugin-credential-actions --stat (1 test file; 118 insertions, 338 deletions)

From Codex