change: [UIE-9908] - Update Generational Plans default sort to show newest (G8) -> oldest (G6)

[pmakode-akamai]

Description 📝

Update the default sort of the plans when "All" is selected so that the plans descend from newest (G8) to oldest (G6)

Changes 🔄

• Added client-side sorting for generational plans when "All" is selected to show plans from newest (G8) to oldest (G6)
• Added a small getGenerationRank helper to support the ordering
• Added unit tests for the helper

Scope 🚢

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

Target release date 🗓️

28 Jan 2026

Preview 📷

Before	After

How to test 🧪

Verification steps

• Go to Create Linode -> Select a region -> Verify that the plan ordering works as expected
• Go to Kubernetes / Create Cluster -> Select a region -> Verify that the plan ordering works as expected

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

[grevanak-akamai]

Thanks @pmakode-akamai. Changes looks good to me!

[abailly-akamai]

@pmakode-akamai - can you make sure the e2e failures are handled - not sure if you're behind on your branch but we'd want a clean slate to want to merge this. thx

[linode-gh-bot]

Cloud Manager UI test results

🔺 1 failing test on test run #9 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
1 Failing	869 Passing	11 Skipped	50m 21s

Details

Failing Tests
	Spec	Test
❌	clone-linode.spec.ts	Cloud Manager Cypress Tests→clone linode » can clone a Linode from Linode details page

Troubleshooting

Use this command to re-run the failing tests:

pnpm cy:run -s "cypress/e2e/core/linodes/clone-linode.spec.ts"