Turn the gated-off mock banner into a real advertising subsystem (backend +
admin half; the UI rotation lands in PR2).
- internal/ads: campaigns (percent weight + validity window; a perpetual,
undeletable default that fills the remainder up to 100%), 1..N bilingual
messages (en+ru), global display timings; ActiveSet computes the
window-filtered, default-remainder, GCD-reduced, language-resolved rotation
feed. Smooth-weighted-round-robin math is unit-tested.
- migration 00006 (+ jetgen): ad_campaigns / ad_messages / ad_settings, seeded
default campaign + house message + default timings.
- eligibility = !paid_account && hint_balance==0 && !no_banner role (new role;
guests qualify). The resolved feed rides the profile.get response (no new RPC,
works for guests, nothing distinct to filter); language by service_language.
- live update: a notify `banner` sub-kind (re-poll signal) published when an
operator grants hints or grants/revokes no_banner, so the client shows/hides
in place.
- admin console /_gm/banners (+ /_gm/banner-settings): campaign + message CRUD
with reorder, default protection, clamped timings.
- wire: fbs BannerInfo/BannerCampaign on Profile; gateway transcode forwards it.
- docs: ARCHITECTURE §10, FUNCTIONAL (+ _ru), backend README, PRERELEASE tracker
(incl. the deferred app.load aggregator note).
Ilia Denisov