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.

scripts/smoke-packaged-app.js

@@ -23,21 +23,16 @@ const stabilityMsValue = Number.parseInt(argValue('--stability-ms') || '5000', 1
 const stabilityMs = Number.isFinite(stabilityMsValue) && stabilityMsValue >= 0
   ? Math.min(stabilityMsValue, MAX_STABILITY_MS)
   : 5000;
-const childEnv = {
-  ...process.env,
-  FIRELINK_SMOKE_TEST: '1',
-  FIRELINK_DISABLE_ARIA2_POLLER: '1',
-  WEBKIT_DISABLE_COMPOSITING_MODE: '1',
-  GDK_BACKEND: 'x11',
-};
-if (process.argv.includes('--disable-aria2-poller')) {
-  childEnv.FIRELINK_DISABLE_ARIA2_POLLER = '1';
-}
 const READY_PORT_TIMEOUT_MS = 500;
 const child = spawn(executable, [], {
   cwd: process.env.RUNNER_TEMP || process.env.TMPDIR || process.cwd(),
   detached: process.platform !== 'win32',
-  env: childEnv,
+  env: {
+    ...process.env,
+    FIRELINK_SMOKE_TEST: '1',
+    WEBKIT_DISABLE_COMPOSITING_MODE: '1',
+    GDK_BACKEND: 'x11',
+  },
   stdio: ['ignore', 'pipe', 'pipe'],
 });
 

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}");
         }
@@ -18558,8 +18555,7 @@ pub fn run() {
                 // re-enter that handler during native construction.
                 main_window_builder = main_window_builder
                     .visible(false)
-                    .focused(false)
-                    .focusable(false);
+                    .focused(false);
             }
             main_window_builder
                 .build()
@@ -19007,9 +19003,6 @@ pub fn run() {
             let poll_secret = aria2_secret.clone();
             let poll_mgr = Arc::clone(&queue_manager_poll);
             tauri::async_runtime::spawn(async move {
-                if std::env::var_os("FIRELINK_DISABLE_ARIA2_POLLER").is_some() {
-                    return;
-                }
                 let mut interval = tokio::time::interval(std::time::Duration::from_millis(1000));
                 let mut observations: HashMap<String, Aria2ConnectionObservation> = HashMap::new();
                 let mut missing_gid_recovery_at: HashMap<String, Instant> = HashMap::new();