feat: harden support, localize knowledge and add operator availability [skip ci]

Source-only publication of reviewed commit 64e96a7f423673dc29ad56485be9fc79bce8af1c.

Passed in isolation: focused frontend/backend tests, race checks, TypeScript typecheck, lint, Go compilation, Flowgram build, and deterministic SDK build/tests.

Not accepted as a production release: Next.js export/native assembly remains blocked by environment memory limits; browser interaction and MySQL staging acceptance remain unverified. No production server, database/schema, runtime configuration, deployment, release tag, or workflow execution was performed.

Expected source tree: 0a4a7528e9.

internal/ai/rag/retrieve_search.go

@@ -1,3 +1,4 @@
+// Modified in the independent AgentDesk fork: localized knowledge workflows and safe display errors.
 package rag
 
 import (
@@ -72,7 +73,7 @@ func (s *retrieve) searchKnowledgeBaseVectors(ctx context.Context, req RetrieveR
 	return searchResults, trace, nil
 }
 
-func (s *retrieve) hydrateRetrieveResults(searchResults []vectordb.SearchResult) ([]RetrieveResult, int64) {
+func (s *retrieve) hydrateRetrieveResults(ctx context.Context, searchResults []vectordb.SearchResult) ([]RetrieveResult, int64) {
 	if len(searchResults) == 0 {
 		return nil, 0
 	}
@@ -128,6 +129,7 @@ func (s *retrieve) hydrateRetrieveResults(searchResults []vectordb.SearchResult)
 
 		documentTitle := ""
 		faqQuestion := ""
+		content := chunk.Content
 		if chunk.DocumentID > 0 {
 			document := documentByID[chunk.DocumentID]
 			if document == nil || document.Status != enums.StatusOk {
@@ -141,6 +143,7 @@ func (s *retrieve) hydrateRetrieveResults(searchResults []vectordb.SearchResult)
 				continue
 			}
 			faqQuestion = faq.Question
+			content = renderVerifiedFAQChunkContent(ctx, chunk.Content, *faq)
 		}
 
 		results = append(results, RetrieveResult{
@@ -153,7 +156,7 @@ func (s *retrieve) hydrateRetrieveResults(searchResults []vectordb.SearchResult)
 			ChunkNo:         chunk.ChunkNo,
 			Title:           chunk.Title,
 			SectionPath:     chunk.SectionPath,
-			Content:         chunk.Content,
+			Content:         content,
 			Score:           sr.Score,
 			ChunkType:       extractChunkType(sr.Payload),
 		})