Keep the Radio tuning dial silent unless a stream is playing

Releasing the tuning dial always started the chosen station, plus tuning
static, even when nothing was playing. It now follows the Previous/Next
rule: the release plays only if a stream was loading, buffering or playing
when the drag began; otherwise it just selects the station.

The privacy note no longer lists finishing tuning as a way to connect and
now names voice instead, in all locales. Docs, changelog and comments are
tightened to match.

src/i18n/locales/ru.json

@@ -727,7 +727,7 @@
   "STATION TAG": "ТЕГ СТАНЦИИ",
   "DRAG TO TUNE": "ТЯНИТЕ ДЛЯ НАСТРОЙКИ",
   "TAB PREVIEWS · ENTER / SPACE SELECTS": "TAB — ПРОСМОТР · ENTER / SPACE — ВЫБОР",
-  "Audio connects directly to the broadcaster when you press play, finish tuning or choose a station on the globe. Your IP is visible to that broadcaster.": "Звук идёт напрямую от вещателя после нажатия «Пуск», завершения настройки или выбора станции на глобусе. Вещателю виден ваш IP-адрес.",
+  "Audio connects directly to the broadcaster when you press play, choose a station on the globe or ask voice to play. Your IP is visible to that broadcaster.": "Звук идёт напрямую от вещателя после нажатия «Пуск», выбора станции на глобусе или голосовой команды. Вещателю виден ваш IP-адрес.",
   "Internet radio and local SDR": "Интернет-радио и локальный SDR",
   "Filter stations by station tag": "Фильтровать станции по тегу",
   "CONTEXT": "КОНТЕКСТ",