Update app icon to Avigilon Alta logo, remove Test Connection button, rename proxy buttons

- Replace app icon (assets/icon.png) with Avigilon Alta "A" logo
- Add Windows .ico version of the icon
- Remove Test Connection button from API Connection section
- Rename Start/Stop Cookie Proxy buttons to Start/Stop Proxy
- Add .claude/ and nul to .gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

renderer.js

@@ -13,7 +13,6 @@ const statusIndicator = document.getElementById('statusIndicator');
 const deviceSearch = document.getElementById('deviceSearch');
 
 // Connection buttons
-const testConnectionBtn = document.getElementById('testConnectionBtn');
 const disconnectBtn = document.getElementById('disconnectBtn');
 
 // Cookie proxy elements
@@ -28,7 +27,6 @@ let activeCookieProxyConnections = new Map(); // Track cookie-based proxy connec
 let allDevices = []; // Store all devices for search functionality
 
 // Event listeners
-testConnectionBtn.addEventListener('click', handleTestConnection);
 disconnectBtn.addEventListener('click', handleDisconnect);
 
 // Cookie proxy event listeners
@@ -41,32 +39,6 @@ cookieKey.addEventListener('input', updateCookieProxyButtonStates);
 // Device search event listener
 deviceSearch.addEventListener('input', handleDeviceSearch);
 
-// Handle test connection
-async function handleTestConnection() {
-    if (!sessionData.isConnected) {
-        showStatus(connectionStatus, 'Please connect to API first', 'error');
-        return;
-    }
-
-    showStatus(connectionStatus, 'Testing connection...', 'info');
-
-    try {
-        const result = await window.electronAPI.getAuthInfo({
-            deploymentUrl: sessionData.deploymentUrl,
-            cookies: sessionData.cookies
-        });
-
-        if (result.success) {
-            showStatus(connectionStatus, 'Connection test successful!', 'success');
-        } else {
-            showStatus(connectionStatus, `Connection test failed: ${result.message}`, 'error');
-        }
-    } catch (error) {
-        console.error('Test connection error:', error);
-        showStatus(connectionStatus, `Test failed: ${error.message}`, 'error');
-    }
-}
-
 // Handle disconnect
 function handleDisconnect() {
     sessionData.isConnected = false;
@@ -216,10 +188,8 @@ function updateConnectionStatus(connected) {
 // Update button states based on connection status
 function updateButtonStates() {
     if (sessionData.isConnected) {
-        testConnectionBtn.disabled = false;
         disconnectBtn.disabled = false;
     } else {
-        testConnectionBtn.disabled = true;
         disconnectBtn.disabled = true;
         startCookieProxyBtn.disabled = true;
         stopCookieProxyBtn.disabled = true;