feat: show price evidence in growth details

tests/test_pchome_revenue_growth_service.py

@@ -457,6 +457,10 @@ def test_ai_intelligence_template_uses_pchome_growth_name_and_endpoint():
     assert "商品策略分流" in template
     assert "growth-strategy-card" in template
     assert "aiRecsPanel" in template
+    assert "growth-detail-price-grid" in template
+    assert "growth-price-chip" in template
+    assert "formatGrowthDetailPrice" in template
+    assert "formatGapDisplay" in template
     assert "scrollToPanel('externalPricePanel')" in template
     assert "備援資料檢查" in template
     assert "外部報價預檢" not in template