[codex] Preserve combobox search on selection

[munezaclovis]

Summary

• Preserve the active search query and filtered option list after selecting a non-empty single-select option.
• Keep the existing reset behavior for the blank clear selection path so clearing restores the original options.
• Update browser coverage for server-side search selection and add static filtered selection coverage.

Root Cause

selectOption() reset searchQuery, cleared the input value, and restored originalOptions for every single-select selection. That made dynamic and filtered results disappear immediately after clicking an option.

Automation Note

The fork has a Fix PHP Code Styling workflow that runs on any PHP push and auto-commits Pint changes. After the combobox test change was pushed, that workflow added a Fix styling commit for existing Pint differences in three workbench/test files. The functional combobox change itself is in resources/js/components/combobox.js, resources/dist/components/combobox.js, and tests/Browser/ComboboxTest.php.

Validation

• node bin/build.js
• vendor/bin/testbench filament:assets --no-interaction
• Playwright MCP against http://127.0.0.1:8000/admin/posts/create:
  • static status search for pub keeps pub, keeps only Published, and marks it selected after click
  • server-side category_id search for Tech keeps Tech, keeps Technology, and marks it selected after click
  • clear button still clears the input and restores original static options
  • no browser warnings/errors
• vendor/bin/pint --dirty
• php -l tests/Browser/ComboboxTest.php && php -l src/Components/Combobox.php

Focused Pest browser tests could not run locally because this checkout's lock/vendor state is inconsistent: composer.json requires pestphp/pest-plugin-browser, but composer.lock does not include it, and composer install exits before installing dependencies.