Feat: Enhance query intent search and answer format readability

tests/secondBrainTrace.test.ts

@@ -40,6 +40,17 @@ describe('Second Brain Trace', () => {
             ].join('\n'),
             'utf8'
         );
+        fs.mkdirSync(path.join(brainRoot, 'UX'), { recursive: true });
+        fs.writeFileSync(
+            path.join(brainRoot, 'UX', 'Customer Journey Virtual Store.md'),
+            [
+                '# Customer Journey Virtual Store',
+                '',
+                'Customer-facing virtual stores should connect spatial experience to product discovery, product understanding, and purchase conversion.',
+                'Stakeholder approval often depends on requirement fit, business value, and acceptance criteria rather than visual novelty alone.'
+            ].join('\n'),
+            'utf8'
+        );
         fs.mkdirSync(path.join(brainRoot, '00_Raw', 'conversations'), { recursive: true });
         fs.writeFileSync(
             path.join(brainRoot, '00_Raw', 'conversations', '2026-05-01.md'),
@@ -189,4 +200,19 @@ describe('Second Brain Trace', () => {
             fs.rmSync(root, { recursive: true, force: true });
         }
     });
+
+    it('prioritizes UX and business documents for approval and customer-experience questions', () => {
+        const trace = buildSecondBrainTrace(
+            '롯데 이노베이트가 고객 대상 버추얼 웹스토어에서 상품 중심이 아니라 공간 중심 개발 방향을 승인할 가능성이 있을까?',
+            brainRoot,
+            { force: true }
+        );
+
+        expect(trace.queryIntent).toBe('ux-business');
+        expect(trace.retrievalQuery).toContain('customer journey');
+        expect(trace.retrievalQuery).toContain('approval');
+        expect(trace.retrievedDocuments[0].path).toContain('Customer Journey Virtual Store.md');
+        expect(trace.retrievedDocuments[0].path).not.toContain('API Gateway.md');
+        expect(renderSecondBrainTraceContext(trace)).toContain('Approval likelihood is an inference');
+    });
 });