Add search/filter UI and behavior for FAQ questions #21597
BackAdd a search input and button to the FAQ questions pages and wire up client/server filtering. In Blazor: add a TextEdit search bar and search button to FaqQuestionsManagement.razor, import Microsoft.AspNetCore.Components.Web and implement OnKeyPress to trigger GetEntitiesAsync on Enter. In Razor/JS: add a search form in Questions.cshtml, include the filter value in the DataTables AJAX getFilter payload, and attach a submit handler that reloads the table. These changes enable users to filter FAQ questions by a text query.
Description
Resolves #21493
Checklist
- I fully tested it as developer
- no need to document
- no need to design for this PR
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