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/generated/enums.ts

@@ -337,10 +337,16 @@ export const KnowledgeRetrieveSceneLabels: Record<KnowledgeRetrieveScene, string
 export enum ServiceStatus {
   Idle = 0,
   Busy = 1,
+  Break = 2,
+  Unavailable = 3,
+  Vacation = 4,
 }
 export const ServiceStatusLabels: Record<ServiceStatus, string> = {
   [ServiceStatus.Idle]: "空闲",
   [ServiceStatus.Busy]: "忙碌",
+  [ServiceStatus.Break]: "休息",
+  [ServiceStatus.Unavailable]: "不可用",
+  [ServiceStatus.Vacation]: "休假",
 }
 
 export enum Status {