wip: agui integration

tests/renderer/navigation/useChatSurfaceState.test.tsx

@@ -0,0 +1,40 @@
+import { describe, expect, it } from 'vitest';
+import { act, renderHook } from '@testing-library/react';
+import { useChatSurfaceState } from '../../../src/renderer/navigation/useChatSurfaceState';
+
+describe('useChatSurfaceState', () => {
+  it('tracks a full user-assistant turn including streaming and tool calls', () => {
+    const { result } = renderHook(() => useChatSurfaceState());
+
+    act(() => {
+      result.current.beginUserTurn('conv-1', 'hello');
+      result.current.appendStreamDelta('A');
+      result.current.appendStreamDelta('B');
+      result.current.recordToolCall('list_posts', { query: 'hello' });
+      result.current.recordToolResult('list_posts');
+      result.current.finalizeAssistantTurn('conv-1', 'AB');
+    });
+
+    expect(result.current.messages).toHaveLength(2);
+    expect(result.current.messages[0].role).toBe('user');
+    expect(result.current.messages[1].role).toBe('assistant');
+    expect(result.current.messages[1].content).toBe('AB');
+    expect(result.current.messages[1].toolCalls).toContain('list_posts');
+    expect(result.current.isStreaming).toBe(false);
+    expect(result.current.streamingContent).toBe('');
+  });
+
+  it('aborts a stream into a partial assistant message', () => {
+    const { result } = renderHook(() => useChatSurfaceState());
+
+    act(() => {
+      result.current.beginUserTurn('conv-2', 'hello');
+      result.current.appendStreamDelta('partial content');
+      result.current.abortStreaming('conv-2', 'Cancelled');
+    });
+
+    expect(result.current.messages).toHaveLength(2);
+    expect(result.current.messages[1].content).toContain('partial content');
+    expect(result.current.messages[1].content).toContain('Cancelled');
+  });
+});