feat: [UIE-10361] - Improve UpdateDelegateDrawer & EntitiesSelect UI

[abailly-akamai]

Description 📝

This PR bring important UI updates to both the Update Delegation and Add New Roles / Update Entities drawers.

When dealing with large accounts and datasets, the Autocomplete UI selection was providing a poor user experience. This is best shown in the screen recording below:

Screen.Recording.2026-02-26.at.13.24.17.mov

The new UI is a recent pattern that was recently implemented on the multi region image selection, and helps greatly with the user experience making/seeing selections (in this case delegate users and entities, for which we could have many on large accounts).

Changes 🔄

• Implement select list in UpdateDelegationForm
• Implement select list in EntitiesSelect
• Update tests and utils as needed

Scope 🚢

Upon production release, changes in this PR will be visible to:

• All customers
• Some customers (e.g. in Beta or Limited Availability)
• No customers / Not applicable

Target release date 🗓️

⚠️ 3/18/2026

Preview 📷

Flow	Before	After
Update Delegation
Entities

How to test 🧪

Prerequisites

A large Parent / Child account with many users & many entities

Verification steps

Update delegation

• /iam/delegations => Update Delegation for a Child Account
• Confirm Update delegation drawer behaves properly, a stylistically accurate and has no functional regression

Assign new role / Update entities
-/iam/users/<user>/roles => Update Entities for a viewer/contributor role

• Confirm Update delegation drawer behaves properly, a stylistically accurate and has no functional regression

Author Checklists

As an Author, to speed up the review process, I considered 🤔

👀 Doing a self review
❔ Our contribution guidelines
🤏 Splitting feature into small PRs
➕ Adding a changeset
🧪 Providing/improving test coverage
🔐 Removing all sensitive information from the code and PR description
🚩 Using a feature flag to protect the release
👣 Providing comprehensive reproduction steps
📑 Providing or updating our documentation
🕛 Scheduling a pair reviewing session
📱 Providing mobile support
♿ Providing accessibility support

• I have read and considered all applicable items listed above.

As an Author, before moving this PR from Draft to Open, I confirmed ✅

• All tests and CI checks are passing
• TypeScript compilation succeeded without errors
• Code passes all linting rules

[aaleksee-akamai]

just want to highlight that case also. In the flow when we only assigning new role, we don't have any assigned entities, so I think Selected entities: 0 text and No entities selected might be not needed there. However, it looks ok here:

so, maybe only in the case when we don't have any entities and the whole block is disabled (1st screenshot)

[mpolotsk-akamai]

LGTM !

Nit: we could also disable the select box and the list of users while submitting.

[linode-gh-bot]

Cloud Manager UI test results

🔺 2 failing tests on test run #13 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
2 Failing	874 Passing	11 Skipped	46m 49s

Details

Failing Tests
	Spec	Test
❌	backup-linode.spec.ts	Cloud Manager Cypress Tests→linode backups » can capture a manual snapshot
❌	object-storage.e2e.spec.ts	Cloud Manager Cypress Tests→object storage end-to-end tests » can create and delete object storage buckets

Troubleshooting

Use this command to re-run the failing tests:

pnpm cy:run -s "cypress/e2e/core/linodes/backup-linode.spec.ts,cypress/e2e/core/objectStorage/object-storage.e2e.spec.ts"