fix: Resolve TypeScript build errors in Tauri GUI

- Fix type mismatch in App.tsx for setActiveScreen callback
- Remove unused variables in TestScreen.tsx (executionResult, abortControllerRef)
- Remove unused import (useRef) from TestScreen.tsx
- Build now succeeds without TypeScript errors

Author: guyernest

lambda/tools/local-agent/src/App.tsx

@@ -88,7 +88,7 @@ function App() {
     <div className="flex flex-col h-screen">
       <div className="flex flex-1 overflow-hidden">
         {!isMinimized && (
-          <Sidebar activeScreen={activeScreen} onNavigate={setActiveScreen} />
+          <Sidebar activeScreen={activeScreen} onNavigate={(screen) => setActiveScreen(screen as Screen)} />
         )}
         <main className="flex-1 overflow-auto bg-gray-50">
           {renderScreen()}

lambda/tools/local-agent/src/components/Screens/TestScreen.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useRef } from 'react';
+import { useState, useEffect } from 'react';
 import { invoke } from '@tauri-apps/api/tauri';
 import { open } from '@tauri-apps/api/dialog';
 import { readTextFile } from '@tauri-apps/api/fs';
@@ -27,10 +27,10 @@ export default function TestScreen() {
   const [validationResult, setValidationResult] = useState<ValidationResult | null>(null);
   const [isValidating, setIsValidating] = useState(false);
   const [isExecuting, setIsExecuting] = useState(false);
-  const [executionResult, setExecutionResult] = useState<ExecutionResult | null>(null);
+  const [_executionResult, setExecutionResult] = useState<ExecutionResult | null>(null);
   const [executionLog, setExecutionLog] = useState<string[]>([]);
   const [exampleScripts, setExampleScripts] = useState<string[]>([]);
-  const abortControllerRef = useRef<AbortController | null>(null);
+  // const abortControllerRef = useRef<AbortController | null>(null); // TODO: Implement abort functionality
 
   useEffect(() => {
     // Load list of example scripts