tool call logging, centralized temp dir

mcp/server.ts

@@ -1,5 +1,3 @@
-#!/usr/bin/env node
-// Minimal GitHub Issue Comment MCP Server
 import { FastMCP } from "fastmcp";
 import {
   CreateCommentTool,
@@ -11,6 +9,7 @@ import { IssueTool } from "./issue.ts";
 import { PullRequestTool } from "./pr.ts";
 import { PullRequestInfoTool } from "./prInfo.ts";
 import { ReviewTool } from "./review.ts";
+import { SelectModeTool } from "./selectMode.ts";
 import { addTools } from "./shared.ts";
 
 const server = new FastMCP({
@@ -19,6 +18,7 @@ const server = new FastMCP({
 });
 
 addTools(server, [
+  SelectModeTool,
   CreateCommentTool,
   EditCommentTool,
   CreateWorkingCommentTool,