mpre ui fixes

frontend/src/config/pages/keywords.config.tsx

@@ -245,56 +245,11 @@ export const createKeywordsPageConfig = (
       },
       {
         ...createdColumn,
+        label: 'Added',
         sortable: true,
         sortField: 'created_at',
         render: (value: string) => formatRelativeDate(value),
       },
-      // Optional columns - hidden by default
-      {
-        key: 'updated_at',
-        label: 'Updated',
-        sortable: true,
-        sortField: 'updated_at',
-        defaultVisible: false,
-        render: (value: string) => formatRelativeDate(value),
-      },
-      {
-        key: 'volume_override',
-        label: 'Volume Override',
-        sortable: true,
-        sortField: 'volume_override',
-        defaultVisible: false,
-        render: (value: number | null) => value ? value.toLocaleString() : '-',
-      },
-      {
-        key: 'difficulty_override',
-        label: 'Difficulty Override',
-        sortable: true,
-        sortField: 'difficulty_override',
-        defaultVisible: false,
-        align: 'center' as const,
-        render: (value: number | null) => {
-          if (value === null || value === undefined) return '-';
-          const difficultyNum = getDifficultyNumber(value);
-          return typeof difficultyNum === 'number' ? (
-            <Badge
-              color={
-                difficultyNum === 1 || difficultyNum === 2
-                  ? 'success'
-                  : difficultyNum === 3
-                  ? 'warning'
-                  : 'error'
-              }
-              variant={difficultyNum === 5 ? 'solid' : 'light'}
-              size="sm"
-            >
-              {difficultyNum}
-            </Badge>
-          ) : (
-            difficultyNum
-          );
-        },
-      },
     ],
     filters: [
       {