fix(analytics): restore period-linked report APIs

tests/test_analysis_period_linkage.py

@@ -280,3 +280,14 @@ def test_monthly_frontend_has_replayable_period_and_no_fixed_years():
     assert "data-analysis-target" in tabs
     assert "renderChartEmpty" in script
     assert "未以其他月份回填" in script
+
+
+def test_sales_frontend_uses_live_period_linked_api_routes():
+    script = (ROOT / "web/static/js/page-sales-analysis.js").read_text(encoding="utf-8")
+
+    assert "buildPeriodApiUrl" in script
+    assert "new URLSearchParams(window.location.search)" in script
+    assert "/api/sales_analysis/yoy_comparison" in script
+    assert "/api/sales_analysis/table_data" in script
+    assert "fetch(`/api/yoy?" not in script
+    assert "'/api/sales_table?'" not in script