refactor(lib_commands): drop super::* + glob re-export in sync + lib.rs

Hotspot G next slice — replace cascade-imports in lib_commands/sync/
{device,batch,tray}.rs with explicit per-symbol imports + per-command
re-exports.

sync/mod.rs lists each Tauri command from device / batch / tray
explicitly, plus the three internal helpers consumed by lib.rs and
ui/mini.rs (is_tiling_wm, stop_audio_engine, try_build_tray_icon).
The previous broad `pub(crate) use device::*` etc. is gone.

Inside the .rs files: each `use super::*` is replaced with what the
file actually needs — `super::device::{TrackSyncInfo, ...}` for batch,
`crate::tray_runtime::{Tray*}` + `crate::audio` + `super::super::ui::
{PAUSE_RENDERING_JS, RESUME_RENDERING_JS}` for tray, etc.

Cleanup in lib.rs: drop the now-unused tauri menu/tray imports
(MenuBuilder/MenuItemBuilder/PredefinedMenuItem/TrayIcon*/MouseButton*)
— tray.rs owns those now. Drop `Ordering` (no longer used at lib.rs
scope). Drop `pub(crate) use file_transfer::*;` from
lib_commands/mod.rs (file_transfer is now imported by direct path
where needed: `super::super::file_transfer::*`).

src-tauri/src/lib_commands/sync/tray.rs

@@ -1,4 +1,18 @@
-use super::*;
+use std::sync::atomic::Ordering;
+
+use tauri::menu::{MenuBuilder, MenuItemBuilder, PredefinedMenuItem};
+use tauri::tray::{MouseButton, TrayIcon, TrayIconBuilder, TrayIconEvent};
+use tauri::{Emitter, Manager};
+#[cfg(not(target_os = "windows"))]
+use tauri::tray::MouseButtonState;
+
+use crate::audio;
+use crate::tray_runtime::{
+    tray_state_icon, TrayMenuItems, TrayMenuItemsState, TrayMenuLabels, TrayMenuLabelsState,
+    TrayPlaybackState, TrayState, TrayTooltip,
+};
+
+use super::super::ui::{PAUSE_RENDERING_JS, RESUME_RENDERING_JS};
 
 pub(crate) fn build_tray_icon(app: &tauri::AppHandle) -> tauri::Result<TrayIcon> {
     let labels = app