fix(desktop): cfg-gate the macOS-only Reopen event and install both mac arches in CI [no-user-impact]

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: XNLLLLH <XNLLLLH@users.noreply.github.com>

Author: 3 people

.github/workflows/desktop.yml

@@ -26,8 +26,10 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: dtolnay/rust-toolchain@stable
-        with:
-          targets: ${{ matrix.platform == 'macos-latest' && 'aarch64-apple-darwin,x86_64-apple-darwin' || '' }}
+
+      - name: Add macOS universal targets
+        if: matrix.platform == 'macos-latest'
+        run: rustup target add aarch64-apple-darwin x86_64-apple-darwin
 
       - name: Linux system dependencies
         if: matrix.platform == 'ubuntu-22.04'

desktop/src-tauri/src/main.rs

@@ -460,6 +460,7 @@ fn main() {
             // Dock/Finder re-activation must bring a window back, or the app
             // looks broken ("won't open"). Re-create it and let the supervisor
             // re-point it at the server on its next tick.
+            #[cfg(target_os = "macos")]
             RunEvent::Reopen {
                 has_visible_windows,
                 ..