UI Overhaul

- Windows support: drift now runs natively on Windows, using named pipes instead of Unix sockets.
- Song context menu: press G on any song for quick actions like play, queue, add to playlist, and song info
- Redesined command menu: the : prompt has a new, cleaner design
- Visualizer: a live audio visualizer now sits in the bottomleft corner
- Keybind hints: the most useful shortcuts are showen next to the volume control

src/player.rs

@@ -156,6 +156,7 @@ impl Player {
         cmd.stdin(Stdio::null())
             .stdout(Stdio::null())
             .stderr(Stdio::null());
+        crate::sys::no_window(&mut cmd);
 
         // Linux only: ask the kernel to SIGTERM mpv if drift dies unexpectedly.
         #[cfg(target_os = "linux")]
@@ -175,6 +176,9 @@ impl Player {
             }
         })?;
 
+        // Windows: tie mpv's lifetime to ours.
+        crate::sys::kill_on_exit(&child);
+
         let start = Instant::now();
         let (reader, writer) = loop {
             match ipc::connect(&sock_path) {