Improve pages list search UX

[cuspymd]

Summary

• improve the Pages List search experience by auto-expanding matching page details
• highlight search term matches in page titles, URLs, and highlight text with a theme-aligned purple accent
• reset the search input when the refresh button reloads the list
• add a Playwright E2E test that covers search expansion, match highlighting, and refresh reset behavior

Testing

• npm test
• npx playwright test e2e-tests/pages-list.spec.js -g "search expands filtered page details, highlights matching text, and refresh clears the search input"

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Reapply search filter before auto-expanding page details

displayFilteredPages now auto-expands every rendered row whenever currentSearchTerm is non-empty. Flows like deleting a page (deletePageHighlights), importing, or refreshPagesList call loadAllHighlightedPages(), which repopulates filteredPages from all pages without rerunning filterPages; with an active query this makes non-matching pages appear and all of them expand unexpectedly. This regression is user-visible after any data refresh during search, so expansion should be gated to actual matches or the filter reapplied after reload.

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