refactor: 全局去除误导性AI描述与浮夸修饰，面向生产环境标准化商务智能术语

backend/test/mpuniapp/owner-card-home.test.ts

@@ -217,6 +217,37 @@ describe('OmniCard AI 名片主移动名片中心 (useCardHome.uts)', () => {
       );
     });
   });
+
+  describe('3. formatSvgDataUri 转换契约', () => {
+    it('3.1 遇到 <svg 开头的字符串转为 data:image/svg+xml;utf8,...', () => {
+      const { formatSvgDataUri } = loadUseCardHome() as unknown as {
+        formatSvgDataUri: (svg: string) => string;
+      };
+
+      const raw = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 31 31"><path d="M0 0h31v31H0z"/></svg>';
+      const result = formatSvgDataUri(raw);
+      expect(result.startsWith('data:image/svg+xml;utf8,')).toBe(true);
+      expect(result).toContain(encodeURIComponent('<path d="M0 0h31v31H0z"/>'));
+    });
+
+    it('3.2 遇到已经是 http/https 或 data: 开头的链接保持原样', () => {
+      const { formatSvgDataUri } = loadUseCardHome() as unknown as {
+        formatSvgDataUri: (svg: string) => string;
+      };
+
+      expect(formatSvgDataUri('https://cdn.example.com/qr.png')).toBe('https://cdn.example.com/qr.png');
+      expect(formatSvgDataUri('data:image/png;base64,ABC')).toBe('data:image/png;base64,ABC');
+    });
+
+    it('3.3 遇到空串或无效值返回空串', () => {
+      const { formatSvgDataUri } = loadUseCardHome() as unknown as {
+        formatSvgDataUri: (svg: string) => string;
+      };
+
+      expect(formatSvgDataUri('')).toBe('');
+      expect(formatSvgDataUri('   ')).toBe('');
+    });
+  });
 });
 
 describe('OmniCard AI 名片主名片中心页契约 (index.uvue)', () => {