- Extract notifyYouTubeActionError (new lib/youtubeErrors.ts): the "403 → Connect
your YouTube account, else fallback toast" logic was duplicated in Channels.tsx
and ChannelDiscovery.tsx. (Separate file, not lib/notifications, to avoid the
api ↔ notifications import cycle.)
- Extract format.formatCountOrDash(): the `n != null ? formatViews(n) : "—"` count
cell was repeated across the subs/videos columns in Channels + ChannelDiscovery.
- Register channelsTable / channelDiscoveryTable in storage.ts LS instead of bare
"siftlode.*" string literals.
- Delete 7 dead channels.json keys (filterPlaceholder, tags.newTag/createTag,
row.stored/subs/getFullHistory/getFullHistoryHint) from en/hu/de — verified 0
refs (createTag matches were the unrelated api.createTag method, not the key).
Behavior-neutral. tsc green, knip no new unused, localdev boots.
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