TwinTrade 0.46.0 — frequent sounds and competing-app audio recovery

Restores directional sounds for small price changes (90ms rate limit). Android now plays the existing sound patterns through native PCM with transient ducking audio focus, recovers after another app takes permanent or temporary focus, and preserves mute settings. Browser sounds retain WebAudio.

Includes automated source/browser tests and Android competing-app audio focus/playback regression. L/S and Chart dialogs remain beside Stats.