fix(native): windows 0.61 API paths — repair the CI Windows compile

Four unresolved-import/type errors from the release build (first real compile):
- toast.rs: generic IMap moved to the windows-collections crate; read the reply
  from the ValueSet returned by UserInput() directly (HasKey/Lookup are exposed
  on the class).
- jumplist.rs: PROPVARIANT lives in Win32::System::Com::StructuredStorage (not
  windows::core); IObjectArray/IObjectCollection in Win32::System::Com (not
  UI::Shell); PKEY_Title in Win32::Storage::EnhancedStorage (feature added);
  build the title PROPVARIANT via From<&str> (VT_LPWSTR).
- smtc.rs: event registrations return a plain i64 token in windows 0.61 (the
  EventRegistrationToken newtype is gone).
- thumbbar.rs: HICON was imported inside the fn body but used in its signature —
  fully qualify the return type.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src-tauri/src/native/smtc.rs

@@ -38,8 +38,9 @@ struct Ev {
 struct SmtcState {
     controls: std::sync::Mutex<Option<windows::Media::SystemMediaTransportControls>>,
     // Kept alive so the ButtonPressed handler stays registered for the app's
-    // lifetime; never unregistered.
-    _token: windows::Foundation::EventRegistrationToken,
+    // lifetime; never unregistered. (windows 0.61 event registrations return a
+    // plain i64 token — the EventRegistrationToken newtype is gone.)
+    _token: i64,
 }
 
 /// Called once from `native::setup()`. Creates and configures the SMTC on