imports and update dispatch calls
Replace multiple direct or wildcard imports for actions with
namespaced action groups from 'm3u-state' (e.g. PlaylistActions,
ChannelActions, EpgActions). Update dispatch calls to use the
namespaced action creators (for example, setAdjacentChannelAsActive,
setEpgAvailableFlag, resetActiveEpgProgram, setCurrentEpgProgram,
setActiveEpgProgram, addPlaylist).
This cleans up imports, improves tree-shaking and readability,
and standardizes how actions are referenced across components. It
also fixes inconsistent import styles (wildcard vs. named) and
prepares the codebase for clearer action organization.
4gray