Improve Search Attribute deletion messaging

[laurakwhit]

Description & motivation 💭

• Added an isExisting prop when adding a row so button to remove row is a close icon instead of a trash icon for new attributes.
• In Cloud the trash button is disabled and shows a tooltip.
• The getSupportedTypes prop was removed and the content component now defines the type list internally.
• Added an optional description snippet prop with a fallback <p> that now includes a "Search Attribute docs" Link.
• hideCancelButton prop removed since it was not being used.

Screenshots (if applicable) 📸

Default	Cloud	Cloud w/ delete enabled

Design Considerations 🎨

Testing 🧪

How was this tested 👻

• Manual testing
• E2E tests added
• Unit tests added

Steps for others to test: 🚶🏽‍♂️🚶🏽‍♀️

For an existing search attribute

• type select should be disabled
• if the feature flag is enabled there should be a disabled delete button
• if the feature flag not enabled there should be no delete button

For a new search attbibute

• type select should be enabled
• there should be a close button

Checklists

Draft Checklist

Merge Checklist

Issue(s) closed

DT-4190

Docs

Any docs updates needed?

[vercel]

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Project	Deployment	Actions	Updated (UTC)
holocene	Ready	Preview, Comment	Jul 2, 2026 11:43pm

[temporal-cicd]

• ⚠️ Type 'string | undefined' is not assignable to type 'string'.

[temporal-cicd]

• ⚠️ Type 'string | undefined' is not assignable to type 'string'.

[temporal-cicd]

• ⚠️ Element implicitly has an 'any' type because index expression is not of type 'number'.

[temporal-cicd]

Warnings

⚠️

📊 Strict Mode: 4 errors in 1 file (0.5% of 888 total) src/lib/components/search-attributes-form/search-attributes-form-content.svelte (4) L133:16: 'error' is of type 'unknown'. L202:12: Type 'string | undefined' is not assignable to type 'string'. L203:12: Type 'string | undefined' is not assignable to type 'string'. L207:50: Element implicitly has an 'any' type because index expression is not of type 'number'.

Generated by 🚫 dangerJS against 2b37991

[bilal-karim]

• Can we remove the book-sparkles icon from the docs links?
• In Default / Cloud with delete enabled, the inputs aren't aligned with the Type column heading.
• Is there a reason we're showing "search attributes cannot be deleted" in the card description rather than just the delete button tooltip? Displaying it in the description when no attributes exist may be unnecessary. Could we only show it when search attributes >= 1? Or surface it as an informational alert banner instead of card description text?