fix(frontend): weird AP delivered chart in control panel (#14481)

* fix(frontend): `Out: Fail` was negative number

* fix(frontend): don't stack AP delivered chart

* test(#10336): add `pages/admin/overview.ap-requests.vue` story

* Update CHANGELOG.md

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Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>