fix(frontend): the channels, files and playlists faces stop exporting the stores' read hooks only the old header used

frontend/src/modules/channels/index.ts

@@ -1,5 +1,5 @@
 // The channel manager's public face: its store, mounted at the root and read app-wide, and the sync
 // chip, which the feed's header shows too.
 export { ChannelsProvider } from "./ChannelsProvider";
-export { useChannels, useChannelsActions } from "./channelsContext";
+export { useChannelsActions } from "./channelsContext";
 export { default as SyncStatus } from "./SyncStatus";

frontend/src/modules/files/index.ts

@@ -1,4 +1,4 @@
 // The Files page's public face: its store, mounted at the root, and how a folder is named and pictured.
 export { FilesProvider } from "./FilesProvider";
-export { useFiles, useFilesActions } from "./filesContext";
+export { useFilesActions } from "./filesContext";
 export { folderIcon, folderLabel, sourceLabel, takesUploads } from "./fileFolders";

frontend/src/modules/playlists/index.ts

@@ -1,3 +1,3 @@
 // The playlists page's public face: its store, mounted at the root and read app-wide.
 export { PlaylistsProvider } from "./PlaylistsProvider";
-export { usePlaylists, usePlaylistsActions } from "./playlistsContext";
+export { usePlaylistsActions } from "./playlistsContext";