Finalize design for FL AutoSuggest interface

[davidmpickett]

User Story or Problem Statement

Last year we mapped out some key steps in the flow, but we may need to get more granular to unblock enigneers now that we're getting ready to implement

Figma - before typing Figma - after typing Figma - error message

Description or Additional Context

• [ ] Behavior if user hits enter without selecting item?
• [ ] What is the minimum number of characters to be entered before matches are displayed?
• [ ] Exact text displayed when matching on data other than Term Name?
• [ ] What is the maximum number of service suggestions to display on desktop and on mobile?
• [ ] What is the sort order for matched suggestions?
• [ ] What error messages are needed?
• [ ] What is the expected behavior when user enters additional letters after suggestions are displayed?
• [ ] Are popular searches MVP?
• [ ] Has 526 team solved anything for us since a year ago?

Steps for Implementation

Acceptance Criteria

• [ ] Testable_Outcome_X
• [ ] Testable_Outcome_Y
• [ ] Testable_Outcome_Z
• [ ] Requires design review
• [ ] Requires accessibility review

[jilladams]

Thread here asking if #19484 and #18960 are dupes or not: https://dsva.slack.com/archives/C06S9DADEUB/p1730932102417359