Refactor: Move model files to models directory, one file per type

- Create models directory under src
- Split ChatHistoryMessage and ChatMessageRequest into separate files
- Add models/index.ts to export all models
- Update imports in McpToolServerConfigurationService and tests
- Delete old models.ts file
- All 264 tests passing, no regressions

Co-authored-by: pontemonti <7850950+pontemonti@users.noreply.github.com>

Author: Copilot

packages/agents-a365-tooling/src/McpToolServerConfigurationService.ts

@@ -7,7 +7,7 @@ import axios from 'axios';
 import { TurnContext } from '@microsoft/agents-hosting';
 import { OperationResult, OperationError } from '@microsoft/agents-a365-runtime';
 import { MCPServerConfig, McpClientTool, ToolOptions } from './contracts';
-import { ChatHistoryMessage, ChatMessageRequest } from './models';
+import { ChatHistoryMessage, ChatMessageRequest } from './models/index';
 import { Utility } from './Utility';
 
 import { StreamableHTTPClientTransport } from '@modelcontextprotocol/sdk/client/streamableHttp.js';

packages/agents-a365-tooling/src/models/ChatHistoryMessage.ts

@@ -0,0 +1,27 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+/**
+ * Represents a single message in the chat history.
+ */
+export interface ChatHistoryMessage {
+  /**
+   * The unique identifier for the chat message.
+   */
+  id: string;
+
+  /**
+   * The role of the message sender (e.g., "user", "assistant", "system").
+   */
+  role: string;
+
+  /**
+   * The content of the chat message.
+   */
+  content: string;
+
+  /**
+   * The timestamp of when the message was sent.
+   */
+  timestamp: Date;
+}

…ckages/agents-a365-tooling/src/models.ts …tooling/src/models/ChatMessageRequest.tspackages/agents-a365-tooling/src/models.ts renamed to packages/agents-a365-tooling/src/models/ChatMessageRequest.ts packages/agents-a365-tooling/src/models.ts renamed to packages/agents-a365-tooling/src/models/ChatMessageRequest.ts

@@ -1,30 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
-/**
- * Represents a single message in the chat history.
- */
-export interface ChatHistoryMessage {
-  /**
-   * The unique identifier for the chat message.
-   */
-  id: string;
-
-  /**
-   * The role of the message sender (e.g., "user", "assistant", "system").
-   */
-  role: string;
-
-  /**
-   * The content of the chat message.
-   */
-  content: string;
-
-  /**
-   * The timestamp of when the message was sent.
-   */
-  timestamp: Date;
-}
+import { ChatHistoryMessage } from './ChatHistoryMessage';
 
 /**
  * Represents the request payload for a real-time threat protection check on a chat message.

packages/agents-a365-tooling/src/models/index.ts

@@ -0,0 +1,5 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
+
+export * from './ChatHistoryMessage';
+export * from './ChatMessageRequest';

tests/tooling/models.test.ts

@@ -1,7 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT License.
 
-import { ChatHistoryMessage, ChatMessageRequest } from '../../packages/agents-a365-tooling/src/models';
+import { ChatHistoryMessage, ChatMessageRequest } from '../../packages/agents-a365-tooling/src/models/index';
 
 describe('Chat History Models', () => {
   describe('ChatHistoryMessage', () => {