fix: [M3-9034] - Use empty string instead of unknown for delete dialog titles

[hana-akamai]

Description 📝

Use empty string instead of unknown for delete dialog titles

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

Preview 📷

Before	After
before.mov	after.mov

How to test 🧪

Prerequisites

(How to setup test environment)

• Have some Domains created

Reproduction steps

(How to reproduce the issue, if applicable)

• On another branch, go to the Domains landing page
• Open the network tab, disable cache, and throttle to the slowest speed you can
• Open the delete dialog for a domain and while it is still fetching, hover over the close icon
• The text tooltip displays unknown

Verification steps

(How to verify changes)

• Checkout this PR and go to the Domains landing page
• Open the network tab, disable cache, and throttle to the slowest speed you can
• Open the delete dialog for a domain and while it is still fetching, hover over the close icon
• The text tooltip should not display unknown

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

[mjac0bs]

I couldn't seem to repro with network throttling, but I read through the code and had a look at the domain dialog manually.

Changes look good overall, just noticed a couple things.

[bill-akamai]

Looks good @hana-akamai, confirmed steps ✔️

[mjac0bs]

Thanks Hana!

[linode-gh-bot]

Cloud Manager UI test results

🔺 2 failing tests on test run #5 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
2 Failing	715 Passing	5 Skipped	131m 31s

Details

Failing Tests
	Spec	Test
❌	access-key.e2e.spec.ts	Cloud Manager Cypress Tests→object storage access key end-to-end tests » "before all" hook for "can create an access key with unlimited access - e2e"
❌	linode-storage.spec.ts	Cloud Manager Cypress Tests→linode storage tab » delete disk

Troubleshooting

Use this command to re-run the failing tests:

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