feat(project): add workspace_id to issue/requirement with tri-state update

internal/project/requirement_service.go

@@ -65,16 +65,21 @@ func (s *requirementService) Create(ctx context.Context, c Caller, slug string,
 	}
 	in1 := &Requirement{
 		ID: uuid.New(), ProjectID: p.ID,
-		Title: in.Title, Description: in.Description,
+		WorkspaceID: in.WorkspaceID,
+		Title:       in.Title, Description: in.Description,
 		OwnerID: owner,
 	}
 	out, err := s.createWithRetry(ctx, in1)
 	if err != nil {
 		return nil, err
 	}
-	s.recordAudit(ctx, c, "requirement.create", out.ID.String(), map[string]any{
+	meta := map[string]any{
 		"project_id": p.ID.String(), "number": out.Number, "title": out.Title,
-	})
+	}
+	if in.WorkspaceID != nil {
+		meta["workspace_id"] = in.WorkspaceID.String()
+	}
+	s.recordAudit(ctx, c, "requirement.create", out.ID.String(), meta)
 	return out, nil
 }
 
@@ -137,6 +142,27 @@ func (s *requirementService) Update(ctx context.Context, c Caller, slug string,
 		r.OwnerID = *in.OwnerID
 		changed["owner_id"] = in.OwnerID.String()
 	}
+	// workspace 三态：nil（未提供）/ &uuid.Nil（解绑）/ &id（关联）
+	if in.WorkspaceID != nil {
+		auditFrom := "<none>"
+		if r.WorkspaceID != nil {
+			auditFrom = r.WorkspaceID.String()
+		}
+		if *in.WorkspaceID == uuid.Nil {
+			r.WorkspaceID = nil
+		} else {
+			v := *in.WorkspaceID
+			r.WorkspaceID = &v
+		}
+		auditTo := "<none>"
+		if r.WorkspaceID != nil {
+			auditTo = r.WorkspaceID.String()
+		}
+		if auditFrom != auditTo {
+			changed["from_workspace"] = auditFrom
+			changed["to_workspace"] = auditTo
+		}
+	}
 	if len(changed) == 0 {
 		return r, nil
 	}