Fix all cargo clippy warnings across the workspace

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).

breadarr-tui/src/app.rs

@@ -598,7 +598,7 @@ impl App {
             return;
         };
         let (media_item_id, season_number, monitored) =
-            (detail.id, episode.season_number as i64, episode.monitored);
+            (detail.id, episode.season_number, episode.monitored);
         let result = if monitored {
             self.client
                 .unmonitor_season(media_item_id, season_number)