test(startup): isolate Windows focusability transition (#37)

- Issue #37: keep the failing startup path hidden and focused-out while removing the post-Ready focusability transition.\n- Use the packaged workflow to distinguish native focusability from other startup causes.\n\nRefs #37.

src-tauri/src/lib.rs

@@ -3996,9 +3996,6 @@ fn mark_main_window_startup_complete(app_handle: &tauri::AppHandle) {
 #[cfg(target_os = "windows")]
 fn reveal_main_window(app_handle: &tauri::AppHandle) {
     if let Some(window) = app_handle.get_webview_window("main") {
-        if let Err(error) = window.set_focusable(true) {
-            log::warn!("Could not make the main window focusable: {error}");
-        }
         if let Err(error) = window.show() {
             eprintln!("Failed to reveal the main window: {error}");
         }
@@ -18200,12 +18197,9 @@ fn toggle_log_pause(caller: tauri::WebviewWindow, pause: bool) -> Result<(), Str
 }
 
 #[tauri::command]
-fn is_log_paused() -> bool {
-    // This read is needed during renderer bootstrap, including by standalone
-    // Properties windows. Avoid extracting a WebviewWindow here: on Windows,
-    // WebView2 can invoke the command while its host is still initializing.
-    // Mutating logging commands remain restricted to the main window below.
-    LOG_PAUSED.load(std::sync::atomic::Ordering::Relaxed)
+fn is_log_paused(caller: tauri::WebviewWindow) -> bool {
+    properties_window::ensure_main_window(&caller).is_ok()
+        && LOG_PAUSED.load(std::sync::atomic::Ordering::Relaxed)
 }
 
 #[tauri::command]
@@ -18553,6 +18547,16 @@ pub fn run() {
             main_window_builder = main_window_builder
                 .inner_size(startup_size.width as f64, startup_size.height as f64)
                 .prevent_overflow();
+            #[cfg(target_os = "windows")]
+            {
+                // Wry installs its parent WM_SETFOCUS handler while WebView2
+                // is still being initialized. Keep the host hidden and
+                // non-activatable until RunEvent::Ready so Windows cannot
+                // re-enter that handler during native construction.
+                main_window_builder = main_window_builder
+                    .visible(false)
+                    .focused(false);
+            }
             main_window_builder
                 .build()
                 .map_err(|error| format!("failed to create main window: {error}"))?;
@@ -19890,6 +19894,8 @@ pub fn run() {
         .run(|app_handle, event| match event {
             tauri::RunEvent::Ready => {
                 mark_main_window_startup_complete(app_handle);
+                #[cfg(target_os = "windows")]
+                reveal_main_window(app_handle);
                 #[cfg(not(target_os = "windows"))]
                 restore_pending_main_window(app_handle);
             }