feat(bizdev): 贯通跨阶段事实黑板自动传承与里程碑决策记录

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

internal/bizdev/service.go

@@ -385,6 +385,16 @@ func (s *Service) executeStageInternal(ctx context.Context, req StageRunRequest)
 
 	// 3. 汇总当前阶段累积的事实与前序文档
 	currentFields := make(map[string]string)
+
+	// 若存在项目协同管理器，优先载入已沉淀的项目事实与黑板
+	if s.ctxMgr != nil && req.ProjectID > 0 {
+		if projCtx, err := s.ctxMgr.GetProjectContext(ctx, req.ProjectID); err == nil && projCtx != nil {
+			for k, v := range projCtx.BlackboardFacts {
+				currentFields[k] = v
+			}
+		}
+	}
+
 	if req.Fields != nil {
 		for k, v := range req.Fields {
 			currentFields[k] = v
@@ -531,6 +541,33 @@ func (s *Service) executeStageInternal(ctx context.Context, req StageRunRequest)
 		}
 	}
 
+	// 将本阶段累积沉淀的事实回填到 ContextManager，供下一阶段或后续对话读取
+	if s.ctxMgr != nil && req.ProjectID > 0 {
+		_ = s.ctxMgr.UpdateProjectBlackboard(ctx, req.ProjectID, currentFields)
+		_ = s.ctxMgr.UpdateProjectStage(ctx, req.ProjectID, string(req.Stage))
+		authorName := req.AuthorName
+		if authorName == "" {
+			authorName = "系统协调员"
+		}
+		_, _ = s.ctxMgr.RecordActivity(
+			ctx,
+			req.ProjectID,
+			req.UserID,
+			authorName,
+			"stage_advance",
+			fmt.Sprintf("阶段跃迁至【%s】", targetMeta.Title),
+			map[string]any{
+				"stage":         string(req.Stage),
+				"duration_ms":   time.Since(start).Milliseconds(),
+				"artifacts":     len(executedArtifacts),
+				"device_type":   req.DeviceType,
+				"target_market": req.TargetMarket,
+			},
+			1.0,
+			true, // 里程碑决策，豁免衰减
+		)
+	}
+
 	if streamer != nil {
 		streamer.EmitPhase("stage_completed", fmt.Sprintf("商务成熟度阶段【%s】全部任务协同推演完成！", req.Stage), "coordinator", len(targetMeta.Tasks), len(targetMeta.Tasks), 100)
 		if stageBrief != nil {