chore(monorepo/server): move server-side source code

apps/server/src/services/llm/chat/index.ts

@@ -0,0 +1,29 @@
+/**
+ * Chat module export
+ */
+import restChatService from './rest_chat_service.js';
+import sessionsStore from './sessions_store.js';
+import { ContextHandler } from './handlers/context_handler.js';
+import { ToolHandler } from './handlers/tool_handler.js';
+import { StreamHandler } from './handlers/stream_handler.js';
+import * as messageFormatter from './utils/message_formatter.js';
+import type { ChatSession, ChatMessage, NoteSource } from '../interfaces/chat_session.js';
+import type { LLMStreamMessage } from '../interfaces/chat_ws_messages.js';
+
+// Export components
+export {
+    restChatService as default,
+    sessionsStore,
+    ContextHandler,
+    ToolHandler,
+    StreamHandler,
+    messageFormatter
+};
+
+// Export types
+export type {
+    ChatSession,
+    ChatMessage,
+    NoteSource,
+    LLMStreamMessage
+};