Search-and-pick Manual Generation

New

• Manual Generation now has a media-search picker (#266) — search your libraries for a show, season, episode, or movie and pick it, instead of typing file paths by hand.
• Target a single episode — drill into a series to generate previews for just one episode.
• Multi-select in both search results and the folder/file browser — queue several items in one go.
• Multi-server media search now runs concurrently, so results come back faster.

Fixes

• Folder targets in manual and webhook jobs now expand to all the video files inside them (#266).
• Unraid: the WEB_AUTH_TOKEN field is no longer masked, so Unraid actually saves the value you enter (#263).
• Docker builds retry GPG-key fetches, so an occasional upstream 403 no longer fails the build.