fix(tests): match showInactive() in paired-client-window-reveal spec (#17362)

PR #17347 switched the reveal helper from window.show() to
window.showInactive() and updated the thrown message, but left the
unit test's regex/title matching the old show() wording — failing
deterministically in CI (which builds against current main) while
passing on any stale checkout that predates #17347.

tests/e2e/helpers/paired-client-window-reveal.unit.test.ts

@@ -32,13 +32,13 @@ describe('assertPairedClientWindowRevealed', () => {
     ).toThrow(/no BrowserWindow/)
   })
 
-  it('rejects a window that stays hidden after show()', () => {
+  it('rejects a window that stays hidden after showInactive()', () => {
     expect(() =>
       assertPairedClientWindowRevealed({
         isVisible: false,
         wasVisible: false,
         windowCount: 2
       })
-    ).toThrow(/stayed hidden after show\(\)/)
+    ).toThrow(/stayed hidden after showInactive\(\)/)
   })
 })