Activity insights and shareable profile cards added

# Codex app updates ### New features - Added activity insights and share cards to the [Profile section](/codex/app/settings#profile). You can review Codex usage highlights and save a profile card; sharing is available on consumer ChatGPT plans. ### Performance improvements and bug fixes - Improved Computer Use startup readiness and appshot error reporting. - Fixed browser and review UI issues, including fullscreen browser composer controls, hex color swatches, terminal scrollbar alignment, and animated diff stat alignment. - Expanded onboarding with more role choices so Codex can tailor first-run suggestions more accurately. - Additional performance improvements and bug fixes.