fix: add table borders for the rich tdxt renderer

Author: yaroslav8765

adminforth/spa/src/renderers/RichText.vue

@@ -22,4 +22,19 @@ const htmlContent = protectAgainstXSS(props.record[props.column.name])
    /* You can add default styles here if needed */
   word-break: break-word;
 }
+.rich-text :deep(table) {
+  border-collapse: collapse;
+  border: 1px solid #ddd;
+}
+
+.rich-text :deep(table th),
+.rich-text :deep(table td) {
+  border: 1px solid #ddd;
+  padding: 8px;
+}
+
+.rich-text :deep(table th) {
+  background-color: #f5f5f5;
+  font-weight: 600;
+}
 </style>