fix: Awards columns persistence bug

frontend/src/components/RecentQSOsGrid.tsx

@@ -274,6 +274,12 @@ export function RecentQSOsGrid({ rows, selectAllSignal, onRowDoubleClicked, onRo
       headerTooltip: t('rqg.awardTip', { name: a.name }),
       width: 110,
       cellClass: 'text-[11px]',
+      // Hidden by DEFAULT (award columns are opt-in). Without this, AG Grid shows
+      // them whenever the saved column state doesn't cover them — a newly-added
+      // award, an empty cache, or a rebuild that runs before the saved state is
+      // re-applied — which is why "all award columns" kept reappearing. The user's
+      // saved state (a column they explicitly showed) still overrides this.
+      hide: true,
       valueGetter: (p) => (p.data as any)?.award_refs?.[a.code.toUpperCase()] ?? '',
     }));
     return [...base, ...awards];