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/components/agent-realtime-provider.test.mjs

@@ -1,3 +1,4 @@
+// Modified by the independent AgentDesk fork for support reliability and availability.
 import assert from "node:assert/strict";
 import { readFile } from "node:fs/promises";
 
@@ -8,15 +9,15 @@ const providerSource = await readFile(
   "utf8",
 ).catch(() => "");
 const workbenchLayoutSource = await readFile(
-  new URL("../app/workbench/layout.tsx", import.meta.url),
+  new URL("../app/(dashboard)/workbench/layout.tsx", import.meta.url),
   "utf8",
 );
 const dashboardConversationsPageSource = await readFile(
-  new URL("../app/dashboard/conversations/page.tsx", import.meta.url),
+  new URL("../app/(dashboard)/dashboard/conversations/page.tsx", import.meta.url),
   "utf8",
 );
 const conversationWorkbenchSource = await readFile(
-  new URL("../app/dashboard/conversations/_components/conversation-workbench.tsx", import.meta.url),
+  new URL("../app/(dashboard)/dashboard/conversations/_components/conversation-workbench.tsx", import.meta.url),
   "utf8",
 );