test(sessions): mock SpeechNotifier in sessionServiceHost cloud-permission tests

Main's new terminal-cloud-run permission tests surface a cloud question,
which now flows through the always-on deterministic speak path
(speakDeterministic -> enqueueSpeech -> resolveService(SpeechNotifier)).
The test's resolveService fake didn't mock that token, so it threw
"unmocked token". Add a no-op SpeechNotifier mock alongside the existing
NotificationBus one.

Generated-By: PostHog Code
Task-Id: 779ce8fc-0ff8-46f5-abb0-90dcfa253718

Author: jonmcwest

packages/ui/src/features/sessions/sessionServiceHost.test.ts

@@ -228,6 +228,10 @@ const mockNotificationService = vi.hoisted(() => ({
   notifyPromptComplete: vi.fn(),
 }));
 
+const mockSpeechNotifier = vi.hoisted(() => ({
+  speak: vi.fn(),
+}));
+
 const mockSettingsState = vi.hoisted(() => ({
   customInstructions: "",
   syncCustomInstructionsFromFile: false,
@@ -303,6 +307,9 @@ vi.mock("@posthog/di/container", () => ({
     if (typeof token === "function" && token.name === "NotificationBus") {
       return mockNotificationService;
     }
+    if (typeof token === "function" && token.name === "SpeechNotifier") {
+      return mockSpeechNotifier;
+    }
     throw new Error(`resolveService: unmocked token ${String(token)}`);
   },
 }));