test(startup): isolate post-load IPC control (#37)

- Issue #37: test whether a single command is safe after the document load callback returns.
- Keep the native shell unchanged while replacing the renderer with one post-load IPC call.

Refs #37.

src-tauri/src/lib.rs

@@ -18553,6 +18553,17 @@ 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)
+                    .focusable(false);
+            }
             main_window_builder
                 .build()
                 .map_err(|error| format!("failed to create main window: {error}"))?;
@@ -19890,7 +19901,8 @@ pub fn run() {
         .run(|app_handle, event| match event {
             tauri::RunEvent::Ready => {
                 mark_main_window_startup_complete(app_handle);
-                #[cfg(not(target_os = "windows"))]
+                #[cfg(target_os = "windows")]
+                reveal_main_window(app_handle);
                 restore_pending_main_window(app_handle);
             }
             #[cfg(target_os = "macos")]

src/main.tsx

@@ -1,8 +1,20 @@
-import { initLogger } from "./utils/logger";
+import { invoke } from '@tauri-apps/api/core';
 
-void initLogger();
-
-const rootElement = document.getElementById("root");
+const rootElement = document.getElementById('root');
 if (rootElement) {
-  rootElement.textContent = "Firelink startup control";
+  rootElement.textContent = 'Firelink startup control';
 }
+
+const documentLoaded = new Promise<void>(resolve => {
+  const releaseAfterNativeLoad = () => window.setTimeout(resolve, 0);
+  if (document.readyState === 'complete') {
+    releaseAfterNativeLoad();
+  } else {
+    window.addEventListener('load', releaseAfterNativeLoad, { once: true });
+  }
+});
+
+void documentLoaded.then(async () => {
+  await invoke<number>('begin_dock_badge_session');
+  if (rootElement) rootElement.textContent = 'Firelink post-load IPC control';
+});