refactor(usage): modularize UsagePage into separate section components

src/components/usage/hooks/useChartData.ts

@@ -0,0 +1,76 @@
+import { useState, useMemo } from 'react';
+import type { ChartOptions } from 'chart.js';
+import { buildChartData, type ChartData } from '@/utils/usage';
+import { buildChartOptions } from '@/utils/usage/chartConfig';
+import type { UsagePayload } from './useUsageData';
+
+export interface UseChartDataOptions {
+  usage: UsagePayload | null;
+  chartLines: string[];
+  isDark: boolean;
+  isMobile: boolean;
+}
+
+export interface UseChartDataReturn {
+  requestsPeriod: 'hour' | 'day';
+  setRequestsPeriod: (period: 'hour' | 'day') => void;
+  tokensPeriod: 'hour' | 'day';
+  setTokensPeriod: (period: 'hour' | 'day') => void;
+  requestsChartData: ChartData;
+  tokensChartData: ChartData;
+  requestsChartOptions: ChartOptions<'line'>;
+  tokensChartOptions: ChartOptions<'line'>;
+}
+
+export function useChartData({
+  usage,
+  chartLines,
+  isDark,
+  isMobile
+}: UseChartDataOptions): UseChartDataReturn {
+  const [requestsPeriod, setRequestsPeriod] = useState<'hour' | 'day'>('day');
+  const [tokensPeriod, setTokensPeriod] = useState<'hour' | 'day'>('day');
+
+  const requestsChartData = useMemo(() => {
+    if (!usage) return { labels: [], datasets: [] };
+    return buildChartData(usage, requestsPeriod, 'requests', chartLines);
+  }, [usage, requestsPeriod, chartLines]);
+
+  const tokensChartData = useMemo(() => {
+    if (!usage) return { labels: [], datasets: [] };
+    return buildChartData(usage, tokensPeriod, 'tokens', chartLines);
+  }, [usage, tokensPeriod, chartLines]);
+
+  const requestsChartOptions = useMemo(
+    () =>
+      buildChartOptions({
+        period: requestsPeriod,
+        labels: requestsChartData.labels,
+        isDark,
+        isMobile
+      }),
+    [requestsPeriod, requestsChartData.labels, isDark, isMobile]
+  );
+
+  const tokensChartOptions = useMemo(
+    () =>
+      buildChartOptions({
+        period: tokensPeriod,
+        labels: tokensChartData.labels,
+        isDark,
+        isMobile
+      }),
+    [tokensPeriod, tokensChartData.labels, isDark, isMobile]
+  );
+
+  return {
+    requestsPeriod,
+    setRequestsPeriod,
+    tokensPeriod,
+    setTokensPeriod,
+    requestsChartData,
+    tokensChartData,
+    requestsChartOptions,
+    tokensChartOptions
+  };
+}