fix: resolve 6 remaining Playwright e2e test failures on CI

- archive-tab: replace waitForFunction with waitForURL for ?open= intent
  consumption, increase test timeout to 300s for slow rootNavigationState
  init on CI
- launcher-tab: use Control+t on Linux instead of Meta+t to match app's
  keyboard shortcut definitions for non-Mac platforms
- new-workspace: add waitForSidebarHydration to wait for daemon
  connection before checking sidebar rows, add re-navigation fallback
  if app redirects during hydration, increase timeouts
- setup-streaming: use waitForTerminalContent (xterm buffer API) instead
  of fragile .xterm-rows CSS text matching, wait for terminal attachment
  before checking content

packages/app/e2e/helpers/launcher.ts

@@ -79,9 +79,10 @@ export async function clickNewTerminalButton(page: Page): Promise<void> {
   await button.click();
 }
 
-/** Press Cmd+T (macOS) to open a new tab. */
+/** Press Cmd+T (macOS) or Ctrl+T (Linux/Windows) to open a new tab. */
 export async function pressNewTabShortcut(page: Page): Promise<void> {
-  await page.keyboard.press("Meta+t");
+  const modifier = process.platform === "darwin" ? "Meta" : "Control";
+  await page.keyboard.press(`${modifier}+t`);
 }
 
 // ─── Tab bar assertions ───────────────────────────────────────────────────