fix: address Copilot review - main window lookup and comment clarity

- tidgiMiniWindow.ts: use index.html URL pattern to find main window
  (consistent with other step defs, avoids matching preferences window)
- ui.ts: clarify networkidle timeout comment

features/stepDefinitions/tidgiMiniWindow.ts

@@ -105,8 +105,8 @@ When('I toggle tidgi mini window via IPC', async function(this: ApplicationWorld
     throw new Error('Application not launched');
   }
   await this.app.evaluate(async ({ BrowserWindow }) => {
-    // Find the main window and call toggleTidgiMiniWindow via the service proxy
-    const mainWindow = BrowserWindow.getAllWindows().find(w => !w.isDestroyed() && w.webContents?.getType() === 'window');
+    // Find the main window by URL (consistent with other step defs)
+    const mainWindow = BrowserWindow.getAllWindows().find(w => !w.isDestroyed() && w.webContents?.getURL().includes('index.html'));
     if (!mainWindow) throw new Error('Main window not found');
     await mainWindow.webContents.executeJavaScript('window.service.window.toggleTidgiMiniWindow()');
   });

features/stepDefinitions/ui.ts

@@ -45,7 +45,8 @@ When('I wait for the page to load completely', async function(this: ApplicationW
   }
   await currentWindow?.waitForLoadState('domcontentloaded', { timeout: PLAYWRIGHT_TIMEOUT });
   // Short networkidle gives workspace-creation and other startup IPC time to finish
-  // without blocking on long-lived connections. 3s is enough for the initial burst.
+  // without blocking on long-lived connections. 3s is intentionally different from
+  // PLAYWRIGHT_TIMEOUT — this is just a grace period, not a hard requirement.
   try {
     await currentWindow?.waitForLoadState('networkidle', { timeout: 3000 });
   } catch {