# Independent #458 compact-filter design review

**PASS — bounded design/interaction handoff for the already Owner-authorized delta. No blocking finding remains. This is not app source QA, DEV ACCEPTED or Owner UAT, and it does not introduce another Owner GO requirement.**

The reviewer is independent of the actual Astra High designer. No model/provider call, application source edit, real API/profile mutation or publication was performed. Exact final hashes are in `independent-review.json`; independent browser evidence is `independent-browser-result.json`.

## Exact Owner scope and visuals

Viewed actual390 CLOSED/OPEN and1280 OPEN PNG. One44×44 accessible icon occupies the existing right-hand filter-icon position. «По времени» is absent; no second filter trigger is introduced. CLOSED removes the large LevelGuide block/explanations and «Выходите на корт», without reserving empty panel space. City/date/type controls remain at their previous locations. OPEN uses the accepted modal/bottom-sheet family: contextual summary, only the hidden level setting, optional definitions and a close action. No duplicated city/date/type controls or invented Apply/sort mechanics. The background header, nav, mapstub and game cards are illustrative context, explicitly excluded from the implementation target; do not copy them as a redesign.

Immediate level filtering is consistent with the existing client loaded-list behavior. The active dot is explicitly a hidden-level indicator; city/date/type remain visibly self-describing. «Сбросить уровень» changes only that value, not city/day/activity/personal-trainer context. Closing retains selection. Help exposes the13 existing NTRP values and clarifies self-assessment/other-scale limits; viewing help does not write a profile. Empty results retain load-more and say loaded subset, not that the city has no games. Map and trainer honesty text preserve the list-only limitations.

## Independently executed browser checks

Fresh owned Chromium1243 with sandbox enabled and existing Playwright, localhost static artifact only. Twelve checks passed across390/1280, zero JS errors and zero external requests:

- 390: ONE existing-position icon, default panel/eyebrow absent, Enter focuses level, no duplicate city/day controls
- 390: native modal Tab/Shift+Tab never reaches background; background-focus attempt blocked (native BODY/browser-chrome handoff allowed)
- 390: Escape/X return exact trigger; immediate selection+active indicator persist without Apply
- 390: resetting ONLY level retains date/type/personal-trainer context and valid focus
- 390: loaded-subset empty keeps load-more;13 existing levels reachable; foreignscale3.0 excluded
- 390: map/trainer honesty remains explicit, return retains hidden level filter
- 1280: ONE existing-position icon, default panel/eyebrow absent, Enter focuses level, no duplicate city/day controls
- 1280: native modal Tab/Shift+Tab never reaches background; background-focus attempt blocked (native BODY/browser-chrome handoff allowed)
- 1280: Escape/X return exact trigger; immediate selection+active indicator persist without Apply
- 1280: resetting ONLY level retains date/type/personal-trainer context and valid focus
- 1280: loaded-subset empty keeps load-more;13 existing levels reachable; foreignscale3.0 excluded
- 1280: map/trainer honesty remains explicit, return retains hidden level filter

Source review also confirms the backdrop requires both pointerdown and click outside the dialog rectangle, preventing a drag from inside from dismissing it. Existing operator14 geometry/10 keyboard-dismiss-reset-help checks cover that behavior additionally. Actual backdrop and Escape are dismissal, not reset.

One initial independent harness assumption was corrected and preserved privately: native modal Tab at the browser-chrome boundary can expose `document.activeElement === BODY`. A23-cycle diagnostic proved no background control was focused, dialog remained open, and an explicit focus attempt on the background day selector was blocked. The addressed harness allows only this native chrome/BODY boundary and checks inert background on everycycle; the product artifact was not changed to make tests pass. Production must reuse its existing overlay/focus/history conventions rather than invent a new engine.

## Implementation feasibility and preserved boundaries

The handoff is implementable in existing `GamesDiscoveryPage`, a discovery-only compact `LevelGuide` presentation, and scoped discovery/level-guide styles. The current controlled level owner stays on the page, independent of dialog mounting. Preserve existing profile keep/foreignscale/save behavior, helpers, game filtering/pagination/stale/error gates, city/day/activity/manual-trainer context and map honesty. Do not change backend/API, level classification, create-game sliders, source cards/media dimensions, header/nav, whole-page composition or URL/history contracts. Existing shared CloseButton/modal patterns should supply production chrome and keyboard behavior.

README now distinguishes historical author NOT_RUN from actual operator evidence and explicitly preserves Owner authorization for design→implementation without a new micro-GO. Prior #458alpha23 delivery remains historical accepted work; this new UI delta is not claimed installed. Real app source authoring, independent source QA, Product CI, DEV acceptance and actual installed GoBad/Owner UAT are still pending. Full-page visual redesign, native app behavior, real profile saving and system browser/native controls beyond this artifact were not tested or authorized by this review.