style(tauri): drop redundant use super::*; imports

Five lib_commands submodules either had `use super::*;` duplicated
during the split (core.rs, offline.rs, mini.rs — leftover line 3) or
didn't reference the parent scope at all (navidrome.rs, bandsintown.rs).
Removing them silences all five `unused import` warnings; cargo check
is now warning-free.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src-tauri/src/lib_commands/cache/offline.rs

@@ -1,7 +1,5 @@
 use super::*;
 
-use super::*;
-
 // ─── Offline Track Cache ──────────────────────────────────────────────────────
 
 /// Streams an HTTP response body directly to `dest_path` in small chunks.