fix: resolve lint warnings and test failures

Author: alvinveroy

src/lib/server.ts

@@ -1,7 +1,7 @@
-import { McpServer, ResourceTemplate } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import { ServerRequest, ServerNotification } from "@modelcontextprotocol/sdk/types";
-import { Variables } from "@modelcontextprotocol/sdk/shared/uriTemplate"; // Attempt specific import for Variables
+// import { Variables } from "@modelcontextprotocol/sdk/shared/uriTemplate"; // Attempt specific import for Variables
 import { RequestHandlerExtra } from "@modelcontextprotocol/sdk/shared/protocol"; // Attempt specific import for RequestHandlerExtra
 import fs from "fs/promises";
 import path from "path";

src/utils/text-utils.ts

@@ -1,7 +1,7 @@
 // Utility: Preprocess input text
 export function preprocessText(text: string): string {
   // eslint-disable-next-line no-control-regex
-  text = text.replace(/\x00/g, ""); // Only remove null characters
+  text = text.replace(/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/g, ""); // Remove control characters, preserving \t, \n, and \r
   text = text.replace(/\s+/g, (match) => {
     if (match.includes("\n")) return "\n";
     return " ";