feat(web): configurable browser defaults in Settings → Integrations#7082

fix(web): honour browser defaults on the paths that were skipping them

fix(web): address UI-consistency findings on the browser defaults row

test(web): update preview tests for the new open and createTab shapes

fix(web): tighten the desktop-only browser notice copy

fix(web): frame the desktop-only browser defaults as one disabled block

fix(web): disable desktop-only browser defaults on web clients

feat(web): proper number fields, orientation, and floating-preview toggle

feat(web): configurable browser defaults in Settings → Integrations