Vision model support for Qwen-OAuth (#525)

* refactor: openaiContentGenerator

* refactor: optimize stream handling

* refactor: re-organize refactored files

* fix: unit test cases

* feat: `/model` command for switching to vision model

* fix: lint error

* feat: add image tokenizer to fit vlm context window

* fix: lint and type errors

* feat: add `visionModelPreview` to control default visibility of vision models

* fix: remove deprecated files

* fix: align supported image formats with bailian doc

packages/cli/src/ui/components/ModelSwitchDialog.test.tsx

@@ -0,0 +1,185 @@
+/**
+ * @license
+ * Copyright 2025 Qwen
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import React from 'react';
+import { render } from 'ink-testing-library';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { ModelSwitchDialog, VisionSwitchOutcome } from './ModelSwitchDialog.js';
+
+// Mock the useKeypress hook
+const mockUseKeypress = vi.hoisted(() => vi.fn());
+vi.mock('../hooks/useKeypress.js', () => ({
+  useKeypress: mockUseKeypress,
+}));
+
+// Mock the RadioButtonSelect component
+const mockRadioButtonSelect = vi.hoisted(() => vi.fn());
+vi.mock('./shared/RadioButtonSelect.js', () => ({
+  RadioButtonSelect: mockRadioButtonSelect,
+}));
+
+describe('ModelSwitchDialog', () => {
+  const mockOnSelect = vi.fn();
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+
+    // Mock RadioButtonSelect to return a simple div
+    mockRadioButtonSelect.mockReturnValue(
+      React.createElement('div', { 'data-testid': 'radio-select' }),
+    );
+  });
+
+  it('should setup RadioButtonSelect with correct options', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const expectedItems = [
+      {
+        label: 'Switch for this request only',
+        value: VisionSwitchOutcome.SwitchOnce,
+      },
+      {
+        label: 'Switch session to vision model',
+        value: VisionSwitchOutcome.SwitchSessionToVL,
+      },
+      {
+        label: 'Do not switch, show guidance',
+        value: VisionSwitchOutcome.DisallowWithGuidance,
+      },
+    ];
+
+    const callArgs = mockRadioButtonSelect.mock.calls[0][0];
+    expect(callArgs.items).toEqual(expectedItems);
+    expect(callArgs.initialIndex).toBe(0);
+    expect(callArgs.isFocused).toBe(true);
+  });
+
+  it('should call onSelect when an option is selected', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const callArgs = mockRadioButtonSelect.mock.calls[0][0];
+    expect(typeof callArgs.onSelect).toBe('function');
+
+    // Simulate selection of "Switch for this request only"
+    const onSelectCallback = mockRadioButtonSelect.mock.calls[0][0].onSelect;
+    onSelectCallback(VisionSwitchOutcome.SwitchOnce);
+
+    expect(mockOnSelect).toHaveBeenCalledWith(VisionSwitchOutcome.SwitchOnce);
+  });
+
+  it('should call onSelect with SwitchSessionToVL when second option is selected', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const onSelectCallback = mockRadioButtonSelect.mock.calls[0][0].onSelect;
+    onSelectCallback(VisionSwitchOutcome.SwitchSessionToVL);
+
+    expect(mockOnSelect).toHaveBeenCalledWith(
+      VisionSwitchOutcome.SwitchSessionToVL,
+    );
+  });
+
+  it('should call onSelect with DisallowWithGuidance when third option is selected', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const onSelectCallback = mockRadioButtonSelect.mock.calls[0][0].onSelect;
+    onSelectCallback(VisionSwitchOutcome.DisallowWithGuidance);
+
+    expect(mockOnSelect).toHaveBeenCalledWith(
+      VisionSwitchOutcome.DisallowWithGuidance,
+    );
+  });
+
+  it('should setup escape key handler to call onSelect with DisallowWithGuidance', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    expect(mockUseKeypress).toHaveBeenCalledWith(expect.any(Function), {
+      isActive: true,
+    });
+
+    // Simulate escape key press
+    const keypressHandler = mockUseKeypress.mock.calls[0][0];
+    keypressHandler({ name: 'escape' });
+
+    expect(mockOnSelect).toHaveBeenCalledWith(
+      VisionSwitchOutcome.DisallowWithGuidance,
+    );
+  });
+
+  it('should not call onSelect for non-escape keys', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const keypressHandler = mockUseKeypress.mock.calls[0][0];
+    keypressHandler({ name: 'enter' });
+
+    expect(mockOnSelect).not.toHaveBeenCalled();
+  });
+
+  it('should set initial index to 0 (first option)', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const callArgs = mockRadioButtonSelect.mock.calls[0][0];
+    expect(callArgs.initialIndex).toBe(0);
+  });
+
+  describe('VisionSwitchOutcome enum', () => {
+    it('should have correct enum values', () => {
+      expect(VisionSwitchOutcome.SwitchOnce).toBe('switch_once');
+      expect(VisionSwitchOutcome.SwitchSessionToVL).toBe(
+        'switch_session_to_vl',
+      );
+      expect(VisionSwitchOutcome.DisallowWithGuidance).toBe(
+        'disallow_with_guidance',
+      );
+    });
+  });
+
+  it('should handle multiple onSelect calls correctly', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const onSelectCallback = mockRadioButtonSelect.mock.calls[0][0].onSelect;
+
+    // Call multiple times
+    onSelectCallback(VisionSwitchOutcome.SwitchOnce);
+    onSelectCallback(VisionSwitchOutcome.SwitchSessionToVL);
+    onSelectCallback(VisionSwitchOutcome.DisallowWithGuidance);
+
+    expect(mockOnSelect).toHaveBeenCalledTimes(3);
+    expect(mockOnSelect).toHaveBeenNthCalledWith(
+      1,
+      VisionSwitchOutcome.SwitchOnce,
+    );
+    expect(mockOnSelect).toHaveBeenNthCalledWith(
+      2,
+      VisionSwitchOutcome.SwitchSessionToVL,
+    );
+    expect(mockOnSelect).toHaveBeenNthCalledWith(
+      3,
+      VisionSwitchOutcome.DisallowWithGuidance,
+    );
+  });
+
+  it('should pass isFocused prop to RadioButtonSelect', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const callArgs = mockRadioButtonSelect.mock.calls[0][0];
+    expect(callArgs.isFocused).toBe(true);
+  });
+
+  it('should handle escape key multiple times', () => {
+    render(<ModelSwitchDialog onSelect={mockOnSelect} />);
+
+    const keypressHandler = mockUseKeypress.mock.calls[0][0];
+
+    // Call escape multiple times
+    keypressHandler({ name: 'escape' });
+    keypressHandler({ name: 'escape' });
+
+    expect(mockOnSelect).toHaveBeenCalledTimes(2);
+    expect(mockOnSelect).toHaveBeenCalledWith(
+      VisionSwitchOutcome.DisallowWithGuidance,
+    );
+  });
+});