feat(companion): add typed agent stream subscription helpers

src/companion/runtimeClient.test.ts

@@ -196,6 +196,34 @@ describe('CompanionRuntimeClient', () => {
     expect(streamHandler).toHaveBeenCalledTimes(1);
   });
 
+  it('supports subscribeAgentStream and subscribeAgentTyping helpers', () => {
+    const client = new CompanionRuntimeClient({
+      url: 'ws://127.0.0.1:1',
+    });
+    const streamHandler = vi.fn();
+    const typingHandler = vi.fn();
+    client.subscribeAgentStream(streamHandler);
+    client.subscribeAgentTyping(typingHandler);
+
+    (client as unknown as { handleMessage: (raw: string) => void }).handleMessage(
+      JSON.stringify({
+        id: 52,
+        event: 'agent.stream',
+        data: { token: 'x' },
+      }),
+    );
+    (client as unknown as { handleMessage: (raw: string) => void }).handleMessage(
+      JSON.stringify({
+        id: 53,
+        event: 'agent.typing',
+        data: { active: true },
+      }),
+    );
+
+    expect(streamHandler).toHaveBeenCalledWith({ token: 'x' });
+    expect(typingHandler).toHaveBeenCalledWith({ active: true });
+  });
+
   it('clears all event subscriptions', () => {
     const client = new CompanionRuntimeClient({
       url: 'ws://127.0.0.1:1',