feat: AI分析第三档——海外期货章节、报告分卡片渲染、红绿着色、期号；LLM改流式+分段生成绕开网关120s超时

backend/routes/ai_analysis.py

@@ -43,8 +43,11 @@ def _can_trigger(trade_date: str) -> tuple[bool, str]:
 async def get_latest_report():
     conn = get_connection()
     try:
+        # issue_number：按报告日期序数作为总期号
         row = conn.execute(
-            "SELECT * FROM ai_reports ORDER BY trade_date DESC, id DESC LIMIT 1"
+            """SELECT r.*,
+                      (SELECT COUNT(*) FROM ai_reports WHERE trade_date <= r.trade_date) AS issue_number
+               FROM ai_reports r ORDER BY r.trade_date DESC, r.id DESC LIMIT 1"""
         ).fetchone()
         if not row:
             raise HTTPException(status_code=404, detail="暂无分析报告")