feat(web): score write-path matches by workflow relation

The document list now reports WORKFLOW_SCOPE_MODE, and weighted mode only blocks a cross-workflow write when that title outscores the active workflow.

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

internal/server/project_doc_handlers.go

@@ -13,6 +13,7 @@ import (
 	"chat-agent-system/internal/docgov"
 	"chat-agent-system/internal/docquery"
 	"chat-agent-system/internal/docrevision"
+	"chat-agent-system/internal/workflowscope"
 )
 
 func (s *Server) docflowQuery() *docflow.Query {
@@ -102,6 +103,7 @@ func (s *Server) handleListProjectWorkflowDocuments(w http.ResponseWriter, r *ht
 	writeJSONResponse(w, http.StatusOK, map[string]any{
 		"documents":           docs,
 		"active_workflow_key": activeKey,
+		"workflow_scope_mode": string(workflowscope.CurrentMode()),
 	})
 }