fix(ai-chat): OpenAI Chat Completions for multi-turn + provider settings, stream UX & errors" -m "Live-stand fixes (OpenRouter / OpenAI-compatible):

- openai provider: use .chat() (Chat Completions) instead of the default callable
  (Responses API), which gateways reject on multi-turn -> 400.
- updateAiProviderSettings: assemble settings.ai.provider via jsonb_build_object
  with ::text-cast bound params + jsonb_typeof self-heal (postgres.js was
  double-encoding it into an array; the ::text cast avoids 'could not determine
  data type of parameter').
- chat agent: drop the hard maxOutputTokens cap (truncated complex tool calls);
  keep a tiny cap only on the test-connection ping.
- testConnection + chat stream: surface the real provider error (statusCode+message)
  to logs and the UI instead of generic masks; never log the API key.
- chat UI: typing indicator, incremental streaming render, tool 'running' status, Stop.

Also bundled (prior uncommitted ai-chat work):
- history 'AI agent' provenance badge; vector RAG (pgvector image + page_embeddings
  + AI_QUEUE indexer + space-scoped semanticSearch); external MCP servers backend
  (@ai-sdk/mcp client, SSRF IP-pinning, encrypted headers, admin CRUD/Test);
  yjs duplicate-instance fix via pnpm patch (single CJS instance server-side).

apps/server/src/integrations/queue/constants/queue.interface.ts

@@ -22,6 +22,17 @@ export interface IPageHistoryJob {
   pageId: string;
 }
 
+/**
+ * AI_QUEUE payload for a content change that should trigger a RAG reindex
+ * (§6.7 stage D / §14[M1]). Produced by the collab persistence extension on
+ * `onStoreDocument` and by the page-delete path (the delete case carries the
+ * ids of pages whose embeddings must be purged).
+ */
+export interface IPageContentUpdatedJob {
+  pageIds: string[];
+  workspaceId: string;
+}
+
 export interface INotificationCreateJob {
   userId: string;
   workspaceId: string;