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.

web/lib/knowledge-i18n.ts

@@ -1,3 +1,4 @@
+// Modified in the independent AgentDesk fork: localized knowledge workflows and safe display errors.
 type TFunction = (key: string, values?: Record<string, string | number>) => string
 
 const CHANNEL_LABEL_KEYS: Record<string, string> = {
@@ -46,3 +47,37 @@ export function getKnowledgeChunkProviderLabel(value: string, t: TFunction) {
 function translateByKey(key: string | undefined, fallback: string, t: TFunction) {
   return key ? t(key) : fallback
 }
+
+const TYPE_LABEL_KEYS: Record<string, string> = {
+  document: "knowledge.typeDocument",
+  faq: "knowledge.typeFAQ",
+}
+
+const STATUS_LABEL_KEYS: Record<number, string> = {
+  0: "knowledge.statusOk",
+  1: "knowledge.statusDisabled",
+  2: "knowledge.statusDeleted",
+}
+
+const INDEX_STATUS_LABEL_KEYS: Record<string, string> = {
+  pending: "knowledge.indexPending",
+  indexed: "knowledge.indexIndexed",
+  failed: "knowledge.indexFailed",
+}
+
+export function getKnowledgeTypeLabel(value: string, t: TFunction) {
+  return translateByKey(TYPE_LABEL_KEYS[value], t("knowledge.unknownType"), t)
+}
+
+export function getKnowledgeStatusLabel(value: number, t: TFunction) {
+  return translateByKey(STATUS_LABEL_KEYS[value], t("knowledge.unknownStatus"), t)
+}
+
+export function getKnowledgeIndexStatusLabel(value: string, t: TFunction) {
+  return translateByKey(INDEX_STATUS_LABEL_KEYS[value], t("knowledge.unknownStatus"), t)
+}
+
+// Never expose a stored provider/SQL error, even when talking to an older server.
+export function getKnowledgeIndexErrorLabel(error: string | undefined, t: TFunction) {
+  return error ? t("knowledge.indexFailureSummary") : ""
+}