EsLint v9 (#154)

* Upgrade ESLint and related configurations to version 9

- Update ESLint to version 9.19.0
- Migrate ESLint configurations to flat config format
- Remove deprecated ESLint config files
- Update package dependencies and configurations
- Simplify ESLint setup across packages
- Remove unnecessary ESLint config blocks from package.json files
- Improved CI caching with Turborepo tasks
- Removed duplicate styles

packages/ui/src/shadcn/chart.tsx

@@ -166,8 +166,7 @@ const ChartTooltipContent: React.FC<
     labelKey,
   ]);
 
-  /* @ts-expect-error: TS issue */
-  if (!active ?? !payload?.length) {
+  if (!active || !payload?.length) {
     return null;
   }
 
@@ -286,7 +285,6 @@ const ChartLegendContent: React.FC<
       )}
     >
       {payload.map((item) => {
-        /* eslint-disable @typescript-eslint/restrict-template-expressions */
         const key = `${nameKey ?? item.dataKey ?? 'value'}`;
         const itemConfig = getPayloadConfigFromPayload(config, item, key);