test: add ImageShowTool remote image loading test

src/tools/ImageShowTool/__tests__/ImageShowTool.test.tsx

@@ -0,0 +1,16 @@
+import { describe, it, expect } from 'vitest';
+import { ImageShowTool } from '../ImageShowTool';
+
+// Remote image test to verify ImageShowTool loading and rendering logic
+describe('ImageShowTool', () => {
+  it('loads and processes a remote image successfully', async () => {
+    const url = 'https://upload.wikimedia.org/wikipedia/en/7/7d/Lenna_%28test_image%29.png';
+    const result = await ImageShowTool.call({ url });
+    expect(result.data.success).toBe(true);
+    // Ensure the returned data includes image dimensions
+    expect(typeof result.data.naturalWidth).toBe('number');
+    expect(typeof result.data.naturalHeight).toBe('number');
+    // Base64 representation should be present
+    expect(typeof result.data.base64).toBe('string');
+  });
+});