Podcast USB v0.4.0

WHAT CHANGED IN v0.4

- Artwork refresh and finding episodes stay on Choose, using an inline status
  panel. Finding episodes moves directly to Review after the scan completes.
- Safety Third main/extra matching is automatic for that show. Its explanation
  appears only in Safety Third settings; other shows have no joining checkbox.
- Saved title cleanup in Your lineup > Settings: remove literal phrases,
  remove leading campaign codes such as C03 -, and add a prefix or suffix.
  Stinky Dragon starts with Ad Free/C03 cleanup, while retaining Second Wind.
- Details & rename shows removed text crossed out and additions in green.
  You can edit the title and override saved cleanup for an individual episode.
- Old kept files are renumbered with new downloads as one queue from 01.
  Filename, title and track tags agree; compressed MP3 audio stays identical.
  Skipping an episode also closes gaps in the final numbering.
- Optional Next episodes in order in each show's Settings. Set a batch size
  (default 5). Automatic start uses the latest matched episode on the USB,
  otherwise download history. The From date is ignored for that show.
  Load the available episode list to choose a different starting point. After
  a successful batch, the starting point advances automatically again.
  Only episodes still present in the RSS feed can be retrieved. An unmatched
  automatic starting point is flagged explicitly on Review.
- Live Activity is first and expanded by default. Episode/time/length are on
  the left, with the current action, percentage, speed and ETA on the right.
  Expand an episode to see its own activity history and skip button.
  Technical file details are a separate expandable section underneath.
- USB copying now reports per-file percentage/speed, flushing, read-back hash
  verification, total progress and USB ETA. A live status indicator shows when
  the program last heard from the drive. The final transaction still completes
  safely once writing starts.
- Episode lengths are prominent on Review, the existing USB list, Activity and
  the USB editor. Feed lengths show before download when provided; downloaded
  files and existing USB files are measured directly.
- Modified dates on updated files and show folders are explicitly refreshed.
- The program does not modify Steam settings or Steam recording locations.

