Configuration storage

The browser half persists its configuration in localStorage (key dsh-sound:config), sanitizing every read and filling defaults. Uploaded local music files are stored in IndexedDB (dsh-sound-audio) instead — no localStorage quota limits.
Config keys: enabled, quietCurrent, and six sound + six volume fields — completionSound / approvalSound / questionSound / planReviewSound / goalBlockedSound / failureSound (builtin key, none, local, data: URL, or audio:) and completionVolume … failureVolume (0–1). localFiles keeps the last chosen local file per event so switching to a built-in sound and back does not drop it.
0.2.0 migration: older configs are upgraded automatically — defaultSound becomes completionSound, voice/TTS values degrade to the per-event default, and workspaces / debounceMs / global volume / voice settings are dropped.
Export / import: the settings panel downloads the full config as JSON (IndexedDB audio references are inlined as data URLs) and restores it from a JSON file — moving browsers or machines does not require reconfiguration.
The host half also registers the dsh-sound settings namespace: on rc.6 the settings API allowlist (WEB_SETTINGS_NAMESPACES in dsh-host-apiproxy) does not expose third-party namespaces to browsers, so the client does not depend on settingsScope today; the registration keeps the migration path open for future releases.

dsh-sound