Profiling tools configuration improvement (#25383)

Fix `RSpec/EmptyExampleGroup` cop (#24735)

Add coverage for `URLValidator` (#25591)

Add coverage for `LanguageValidator` (#25593)

Add end-to-end (system) tests (#25461)

Use original URL in preview if it redirects to 4xx page (#26200)

Fix crash when processing Flag activity with no status (#26189)

Change interaction modal in web UI (#26075)

Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

Migrate to request specs in `/api/v2/filters` (#25721)

Use correct naming on controller concern specs (#26197)

Reformat large key values in service specs (#26181)

Reformat large text arg in `FetchLinkCardService` spec (#26183)

Coverage for `Auth::OmniauthCallbacks` controller (#26147)

Fix linting issue (#26106)

Fix CSP headers being unintendedly wide (#26105)

Clean up unused application records (#24871)

Add stricter protocol fields validation for accounts (#25937)

Fix `Lint/Void` cop (#25922)

Move localized subject mailer shared example to separate file (#25889)

Wrong count in response when removing favourite/reblog (#24365)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>