Remove debug login page and refactor TransactionsTable to utilize new utility functions and cell renderers for improved code organization and maintainability.

client/src/components/cellRenderers/JtlRenderer.js

@@ -0,0 +1,29 @@
+import React from 'react';
+
+const JtlRenderer = (params) => {
+  const hasJTL = params.value;
+  const backgroundColor = hasJTL ? '#388e3c' : '#f5f5f5';
+  const border = hasJTL ? 'none' : '1px solid #ccc';
+  
+  return (
+    <div style={{ display: 'flex', justifyContent: 'center', alignItems: 'center', height: '100%' }}>
+      <div style={{ 
+        width: '12px', 
+        height: '12px', 
+        borderRadius: '50%', 
+        backgroundColor: backgroundColor, 
+        border: border, 
+        display: 'flex', 
+        alignItems: 'center', 
+        justifyContent: 'center',
+        fontSize: '8px',
+        color: 'white',
+        fontWeight: 'bold'
+      }}>
+        {hasJTL && '✓'}
+      </div>
+    </div>
+  );
+};
+
+export default JtlRenderer;