🔧 Fix table hover effects and text visibility

- Updated .data-table tr:hover to use subtle dark background
- Fixed .data-table th background and text colors
- Updated table cell text colors to white
- Fixed border colors to match dark theme
- Table text is now readable on hover

public/css/admin-dashboard.css

@@ -177,17 +177,18 @@ body {
 .data-table td {
     padding: 12px;
     text-align: left;
-    border-bottom: 1px solid #eee;
+    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
+    color: #ffffff;
 }
 
 .data-table th {
-    background: #f5f5f5;
+    background: rgba(255, 255, 255, 0.1);
     font-weight: bold;
-    color: #333;
+    color: #ffffff;
 }
 
 .data-table tr:hover {
-    background: #f9f9f9;
+    background: rgba(255, 255, 255, 0.1);
 }
 
 .modal {