Removes genuinely dead code (unused import, no-op cast, an unused
PendingGrab accessor, and TmdbClient's TV-search methods now that TVDB
fully covers that path), tightens len()>0 checks to is_empty(), swaps
two fixed-size test vec!s for arrays, restructures a match to avoid an
unnecessary unwrap_err, fixes doc-comment list indentation, and hoists
a locked-connection call out of a match scrutinee. Struct fields/enum
variants that are still meaningful but not read by current callers
(TorrentInfo::save_path, GrabCycleStats::items_seen, X1337 fallback
route, BacklogCandidate::path) get #[allow(dead_code)] rather than
deletion, same for the two 8-argument functions (too_many_arguments).
add_selected_search_result passed the raw configured default_root_folder
straight through as root_folder for both movies and series, with no
per-item subfolder computed. import_one/season_dir both expect
root_folder to already be the item's own folder, so new grabs landed
directly in the shared library root instead of their own folder,
invisible to Jellyfin's per-category libraries. Split default_root_folder
(series) from a new movies_root_folder, and have the TUI build the
"{Title} (Year)" subfolder itself before sending the add request.
Library tab gets a cycling filter (all/series/movies/missing/unmonitored)
and sort (title/missing/kind), color-coded kind tags and missing-count
severity, and monitor-toggle without opening detail. Keybinding hints move
out of cramped block titles into a context-aware status bar plus a `?`
help overlay, both driven by one shared keybinding table so they can't
drift apart. Episode status icons and review-queue confidence get the same
severity coloring. Stuck tab gains real selection/focus and can jump
straight to a show's Library detail (needed adding media_item_id to
StalledGrab's query — the one small backend touch in this pass). Adds a
manual refresh-now key.
