chore(lint): add perf category to oxlint and fix resulting warnings

- Enable `perf: warn` in `.oxlintrc.json` and add `builtin` env; disable `no-await-in-loop` and `react/no-array-index-key` globally
- Reorder plugins so `oxc` is first
- Add `.oxfmtrc.json` override to suppress trailing commas in JSON/JSONC files
- Replace spread-into-new-object patterns (`{ ...x, key: val }`) with `Object.assign(x, { key: val })` in discover, explore, integrations, search, credits, and image-cache to satisfy perf rules
- Memoize `ChartContext` and `ToggleGroupContext` provider values to avoid unnecessary re-renders

apps/web/src/components/ui/chart.tsx

@@ -44,9 +44,10 @@ function ChartContainer({
 }) {
   const uniqueId = React.useId();
   const chartId = `chart-${id || uniqueId.replace(/:/g, "")}`;
+  const contextValue = React.useMemo(() => ({ config }), [config]);
 
   return (
-    <ChartContext.Provider value={{ config }}>
+    <ChartContext.Provider value={contextValue}>
       <div
         data-slot="chart"
         data-chart={chartId}

apps/web/src/components/ui/toggle-group.tsx

@@ -31,6 +31,10 @@ function ToggleGroup({
     spacing?: number;
     orientation?: "horizontal" | "vertical";
   }) {
+  const contextValue = React.useMemo(
+    () => ({ variant, size, spacing, orientation }),
+    [variant, size, spacing, orientation],
+  );
   return (
     <ToggleGroupPrimitive
       data-slot="toggle-group"
@@ -45,9 +49,7 @@ function ToggleGroup({
       )}
       {...props}
     >
-      <ToggleGroupContext.Provider value={{ variant, size, spacing, orientation }}>
-        {children}
-      </ToggleGroupContext.Provider>
+      <ToggleGroupContext.Provider value={contextValue}>{children}</ToggleGroupContext.Provider>
     </ToggleGroupPrimitive>
   );
 }