fix(practice): 修复分析报告重复插入错误

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/api/v1/practice.py

@@ -828,7 +828,23 @@ async def analyze_practice_session(
         # 解析分析结果
         analysis_result = analysis_data.get("analysis", {})
         
-        # 保存分析报告
+        # 检查报告是否已存在
+        existing_report = await db.execute(
+            select(PracticeReport).where(PracticeReport.session_id == session_id)
+        )
+        report = existing_report.scalar_one_or_none()
+        
+        if report:
+            # 更新现有报告
+            report.total_score = analysis_result.get("total_score")
+            report.score_breakdown = analysis_result.get("score_breakdown")
+            report.ability_dimensions = analysis_result.get("ability_dimensions")
+            report.dialogue_review = analysis_result.get("dialogue_annotations")
+            report.suggestions = analysis_result.get("suggestions")
+            report.workflow_run_id = f"{v2_result.ai_provider}_{v2_result.ai_latency_ms}ms"
+            logger.info(f"更新现有分析报告: session_id={session_id}")
+        else:
+            # 创建新报告
             report = PracticeReport(
                 session_id=session_id,
                 total_score=analysis_result.get("total_score"),
@@ -839,8 +855,8 @@ async def analyze_practice_session(
                 workflow_run_id=f"{v2_result.ai_provider}_{v2_result.ai_latency_ms}ms",
                 task_id=None
             )
-        
             db.add(report)
+        
         await db.commit()
         
         logger.info(f"分析报告已保存: session_id={session_id}, total_score={report.total_score}")
@@ -917,7 +933,7 @@ async def get_practice_report(
             ]
             
             # 调用分析服务
-            from app.services.practice_analysis_service import PracticeAnalysisService
+            from app.services.ai.practice_analysis_service import PracticeAnalysisService
             import json
             
             practice_analysis_service = PracticeAnalysisService()