Use detailed_status effectively. Remove unnecesarry context(nest). Add new context in merge_requests_controller_spec.rb and fix a bug. Correct description of spec.

Fix unchanged structure. Add favicon for 'failed_allowed' and 'success_warning' because it'll be used.

Add `aria-label` for feature status accessibility

Closes #27503

See merge request !9830

Move merge-request-info style to only apply to related MRs

See merge request !10119

Fix `Ctrl+Enter` support for Quick Submit

Closes #29550

See merge request !10002

Fix "N changed files" link toggler jumping to top

Closes #29414

See merge request !10126

Corrected the color from the time tracking icon in the issuable sidebar

Closes #29588

See merge request !10160

Correct pipeline trigger GET functionality.

See merge request !10140

Creates Frontend Style guide

Closes #28713

See merge request !9961

Update user's profile preferences docs

See merge request !10147