fix(studio): add delete action menu to guardrail detail page header

[aray12]

Summary

• Adds a ⋯ actions menu to the GuardrailDetailRoute header with a single Delete action
• On confirm, deletes the config and redirects to the guardrails list
• Updates docs/studio/guardrails.mdx to reflect the new UX (menu instead of a standalone header button)

Test plan

• Open a guardrail config detail page
• Confirm the ⋯ menu appears in the header alongside the Save/Reset buttons
• Click ⋯ → Delete, confirm the dialog, verify redirect to the guardrails list
• Verify the deleted config no longer appears in the list

Summary by CodeRabbit

• New Features

  • Added a Delete action to guardrail detail pages.
  • Added a confirmation step with success and failure feedback.
  • Returns to the guardrails list after successful deletion.

• Documentation

  • Updated deletion instructions to explain using the detail-page actions menu (⋯) before selecting Delete.

[coderabbitai]

📝 Walkthrough

Walkthrough

Changes

Guardrail detail deletion

Layer / File(s)	Summary
Confirmed deletion flow web/packages/studio/src/routes/guardrails/GuardrailDetailRoute/GuardrailDetailActions.tsx	Adds a delete action with confirmation, API error handling, query invalidation, success or failure reporting, and navigation after deletion.
Detail header integration and documentation web/packages/studio/src/routes/guardrails/GuardrailDetailRoute/index.tsx, docs/studio/guardrails.mdx	Adds the action to the detail-page header and updates the instructions to use the actions menu.

Sequence Diagram(s)

sequenceDiagram
  participant User
  participant GuardrailDetailActions
  participant DeleteModal
  participant GuardrailAPI
  participant WorkspaceConfigurationQuery
  User->>GuardrailDetailActions: Select Delete
  GuardrailDetailActions->>DeleteModal: Open confirmation
  User->>DeleteModal: Confirm deletion
  DeleteModal->>GuardrailAPI: Delete guardrail
  GuardrailAPI-->>DeleteModal: Return result
  DeleteModal->>WorkspaceConfigurationQuery: Invalidate configuration query
  DeleteModal-->>User: Show success or failure

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Possibly related PRs

• NVIDIA-NeMo/nemo-platform#185: Adds a similar detail-page action menu with deletion confirmation and navigation.
• NVIDIA-NeMo/nemo-platform#792: Updates the same guardrail deletion documentation.
• NVIDIA-NeMo/nemo-platform#830: Modifies the same guardrail detail route structure.

Suggested reviewers: nakolean

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the added delete action menu on the guardrail detail page header.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch aastd-367-nemo-platformoss-040studiodoc-studio-guardrails-doc-claims

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[github-actions]

🌿 Preview your docs: https://nvidia-preview-pr-1114-aastd-367-nemo-platformoss-040studiodoc.docs.buildwithfern.com/nemo-platform

[github-actions]

Suite	Lines Covered	Line Rate	Branch Rate
Unit Tests	30786/39277	78.4%	62.8%
Integration Tests	18077/37229	48.6%	21.1%