chore(audio): declare windows Power/WindowsAndMessaging features in psysonic-audio (#1111)

power_notify_win.rs imports windows::Win32::System::Power and
UI::WindowsAndMessaging, but the crate only declared Foundation/Com/Threading.
It compiled solely via workspace feature unification (the root src-tauri crate
enables them), so building or testing psysonic-audio in isolation on Windows
(cargo check/test -p psysonic-audio) failed with E0432 unresolved imports.
Declare the two features the crate actually uses so it builds standalone.
No behaviour change; workspace/release builds already had these features.

src-tauri/crates/psysonic-audio/Cargo.toml

@@ -40,6 +40,8 @@ windows = { version = "0.62", features = [
     "Win32_Foundation",
     "Win32_System_Com",
     "Win32_System_Threading",
+    "Win32_System_Power",
+    "Win32_UI_WindowsAndMessaging",
 ] }
 
 [dev-dependencies]