feat: enhance MainLayout with brand name expansion feature, sidebar toggle improvements, and responsive design adjustments for better user experience

src/pages/UsagePage.module.scss

@@ -1,24 +1,53 @@
+@use '../styles/variables' as *;
+@use '../styles/mixins' as *;
+
 .container {
   width: 100%;
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-lg;
+}
+
+.header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: $spacing-md;
 }
 
 .pageTitle {
   font-size: 28px;
   font-weight: 700;
   color: var(--text-primary);
-  margin: 0 0 $spacing-xl 0;
+  margin: 0;
 }
 
-.content {
-  display: flex;
-  flex-direction: column;
-  gap: $spacing-xl;
+.errorBox {
+  padding: $spacing-md;
+  background-color: rgba(239, 68, 68, 0.1);
+  border: 1px solid var(--danger-color);
+  border-radius: $radius-md;
+  color: var(--danger-color);
+  font-size: 14px;
 }
 
+.hint {
+  color: var(--text-secondary);
+  font-size: 14px;
+  text-align: center;
+  padding: $spacing-lg;
+}
+
+// Stats Grid
 .statsGrid {
   display: grid;
   gap: $spacing-md;
-  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+  grid-template-columns: repeat(4, 1fr);
+
+  @include tablet {
+    grid-template-columns: repeat(2, 1fr);
+  }
 
   @include mobile {
     grid-template-columns: 1fr;
@@ -30,20 +59,345 @@
   background-color: var(--bg-primary);
   border-radius: $radius-lg;
   border: 1px solid var(--border-color);
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-sm;
+}
 
-  .label {
-    font-size: 14px;
-    color: var(--text-secondary);
-    margin-bottom: $spacing-sm;
-  }
+.statHeader {
+  display: flex;
+  align-items: center;
+  gap: $spacing-sm;
+}
 
-  .value {
-    font-size: 24px;
-    font-weight: 700;
-    color: var(--text-primary);
+.statIcon {
+  font-size: 18px;
+}
+
+.statLabel {
+  font-size: 14px;
+  color: var(--text-secondary);
+  font-weight: 500;
+}
+
+.statValue {
+  font-size: 28px;
+  font-weight: 700;
+  color: var(--text-primary);
+  line-height: 1.2;
+}
+
+.statValueRow {
+  display: flex;
+  gap: $spacing-lg;
+}
+
+.statValueSmall {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.statValueLabel {
+  font-size: 12px;
+  color: var(--text-secondary);
+}
+
+.statValueNum {
+  font-size: 20px;
+  font-weight: 700;
+  color: var(--text-primary);
+}
+
+.statMeta {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  font-size: 12px;
+}
+
+.statSuccess {
+  color: var(--success-color, #22c55e);
+}
+
+.statFailure {
+  color: var(--danger-color, #ef4444);
+}
+
+.statNeutral {
+  color: var(--text-secondary);
+}
+
+.statHint {
+  color: var(--text-tertiary);
+  font-style: italic;
+}
+
+// API List
+.apiList {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-sm;
+}
+
+.apiItem {
+  background-color: var(--bg-secondary);
+  border-radius: $radius-md;
+  border: 1px solid var(--border-color);
+  overflow: hidden;
+}
+
+.apiHeader {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: $spacing-md;
+  cursor: pointer;
+  transition: background-color 0.15s ease;
+
+  &:hover {
+    background-color: var(--bg-hover);
   }
 }
 
+.apiInfo {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-xs;
+  min-width: 0;
+  flex: 1;
+}
+
+.apiEndpoint {
+  font-weight: 600;
+  color: var(--text-primary);
+  font-size: 14px;
+  word-break: break-all;
+}
+
+.apiStats {
+  display: flex;
+  flex-wrap: wrap;
+  gap: $spacing-xs;
+}
+
+.apiBadge {
+  font-size: 12px;
+  color: var(--text-secondary);
+  background-color: var(--bg-tertiary);
+  padding: 2px 8px;
+  border-radius: $radius-sm;
+}
+
+.expandIcon {
+  color: var(--text-secondary);
+  font-size: 12px;
+  margin-left: $spacing-sm;
+}
+
+.apiModels {
+  padding: $spacing-md;
+  padding-top: 0;
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-xs;
+  border-top: 1px solid var(--border-color);
+  margin-top: 0;
+  padding-top: $spacing-md;
+}
+
+.modelRow {
+  display: grid;
+  grid-template-columns: 1fr auto auto;
+  gap: $spacing-md;
+  padding: $spacing-xs $spacing-sm;
+  background-color: var(--bg-primary);
+  border-radius: $radius-sm;
+  font-size: 13px;
+
+  @include mobile {
+    grid-template-columns: 1fr;
+    gap: $spacing-xs;
+  }
+}
+
+.modelName {
+  color: var(--text-primary);
+  font-weight: 500;
+  word-break: break-all;
+}
+
+.modelStat {
+  color: var(--text-secondary);
+  text-align: right;
+
+  @include mobile {
+    text-align: left;
+  }
+}
+
+// Table
+.tableWrapper {
+  overflow-x: auto;
+}
+
+.table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 14px;
+
+  th, td {
+    padding: $spacing-sm $spacing-md;
+    text-align: left;
+    border-bottom: 1px solid var(--border-color);
+  }
+
+  th {
+    font-weight: 600;
+    color: var(--text-secondary);
+    background-color: var(--bg-secondary);
+    white-space: nowrap;
+  }
+
+  td {
+    color: var(--text-primary);
+  }
+
+  tbody tr:hover {
+    background-color: var(--bg-hover);
+  }
+}
+
+.modelCell {
+  font-weight: 500;
+  max-width: 300px;
+  word-break: break-all;
+}
+
+// Pricing Section
+.pricingSection {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-lg;
+}
+
+.priceForm {
+  padding: $spacing-md;
+  background-color: var(--bg-secondary);
+  border-radius: $radius-md;
+  border: 1px solid var(--border-color);
+}
+
+.formRow {
+  display: flex;
+  gap: $spacing-md;
+  align-items: flex-end;
+  flex-wrap: wrap;
+
+  @include mobile {
+    flex-direction: column;
+    align-items: stretch;
+  }
+}
+
+.formField {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-xs;
+  flex: 1;
+  min-width: 150px;
+
+  label {
+    font-size: 12px;
+    color: var(--text-secondary);
+    font-weight: 500;
+  }
+}
+
+.select {
+  padding: 8px 12px;
+  border: 1px solid var(--border-color);
+  border-radius: $radius-md;
+  background-color: var(--bg-primary);
+  color: var(--text-primary);
+  font-size: 14px;
+  cursor: pointer;
+
+  &:focus {
+    outline: none;
+    border-color: var(--primary-color);
+  }
+}
+
+.pricesList {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-md;
+}
+
+.pricesTitle {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin: 0;
+}
+
+.pricesGrid {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-sm;
+}
+
+.priceItem {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: $spacing-md;
+  background-color: var(--bg-secondary);
+  border-radius: $radius-md;
+  border: 1px solid var(--border-color);
+  gap: $spacing-md;
+
+  @include mobile {
+    flex-direction: column;
+    align-items: flex-start;
+  }
+}
+
+.priceInfo {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-xs;
+  min-width: 0;
+  flex: 1;
+}
+
+.priceModel {
+  font-weight: 600;
+  color: var(--text-primary);
+  font-size: 14px;
+  word-break: break-all;
+}
+
+.priceMeta {
+  display: flex;
+  gap: $spacing-md;
+  font-size: 12px;
+  color: var(--text-secondary);
+
+  @include mobile {
+    flex-direction: column;
+    gap: $spacing-xs;
+  }
+}
+
+.priceActions {
+  display: flex;
+  gap: $spacing-xs;
+  flex-shrink: 0;
+}
+
+// Chart Section (for future use)
 .chartSection {
   display: flex;
   flex-direction: column;
@@ -68,4 +422,68 @@
   border-radius: $radius-lg;
   border: 1px solid var(--border-color);
   min-height: 300px;
+  height: 300px;
+}
+
+.periodButtons {
+  display: flex;
+  gap: $spacing-xs;
+}
+
+// Chart Line Controls
+.chartLineControls {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  gap: $spacing-lg;
+  flex-wrap: wrap;
+
+  @include mobile {
+    flex-direction: column;
+  }
+}
+
+.chartLineList {
+  display: flex;
+  flex-direction: column;
+  gap: $spacing-sm;
+  flex: 1;
+}
+
+.chartLineItem {
+  display: flex;
+  align-items: center;
+  gap: $spacing-sm;
+  flex-wrap: wrap;
+
+  @include mobile {
+    flex-direction: column;
+    align-items: flex-start;
+  }
+}
+
+.chartLineLabel {
+  font-size: 14px;
+  color: var(--text-secondary);
+  min-width: 60px;
+}
+
+.chartLineActions {
+  display: flex;
+  align-items: center;
+  gap: $spacing-sm;
+  flex-shrink: 0;
+}
+
+.chartLineCount {
+  font-size: 14px;
+  color: var(--text-secondary);
+  font-weight: 500;
+}
+
+.chartLineHint {
+  font-size: 12px;
+  color: var(--text-tertiary);
+  margin: $spacing-sm 0 0 0;
+  font-style: italic;
 }

src/pages/UsagePage.tsx

@@ -1,19 +1,56 @@
-import { useEffect, useState } from 'react';
+import { useEffect, useState, useCallback, useMemo } from 'react';
 import { useTranslation } from 'react-i18next';
+import {
+  Chart as ChartJS,
+  CategoryScale,
+  LinearScale,
+  PointElement,
+  LineElement,
+  Title,
+  Tooltip,
+  Legend,
+  Filler
+} from 'chart.js';
+import { Line } from 'react-chartjs-2';
 import { Card } from '@/components/ui/Card';
 import { Button } from '@/components/ui/Button';
+import { Input } from '@/components/ui/Input';
 import { usageApi } from '@/services/api/usage';
-import type { KeyStats } from '@/utils/usage';
+import {
+  formatTokensInMillions,
+  formatPerMinuteValue,
+  formatUsd,
+  calculateTokenBreakdown,
+  calculateRecentPerMinuteRates,
+  calculateTotalCost,
+  getModelNamesFromUsage,
+  getApiStats,
+  getModelStats,
+  loadModelPrices,
+  saveModelPrices,
+  buildChartData,
+  type ModelPrice
+} from '@/utils/usage';
+import styles from './UsagePage.module.scss';
+
+// Register Chart.js components
+ChartJS.register(
+  CategoryScale,
+  LinearScale,
+  PointElement,
+  LineElement,
+  Title,
+  Tooltip,
+  Legend,
+  Filler
+);
 
 interface UsagePayload {
   total_requests?: number;
-  success_requests?: number;
-  failed_requests?: number;
+  success_count?: number;
+  failure_count?: number;
   total_tokens?: number;
-  cached_tokens?: number;
-  reasoning_tokens?: number;
-  rpm_30m?: number;
-  tpm_30m?: number;
+  apis?: Record<string, any>;
   [key: string]: any;
 }
 
@@ -23,86 +60,547 @@ export function UsagePage() {
   const [usage, setUsage] = useState<UsagePayload | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState('');
-  const [keyStats, setKeyStats] = useState<KeyStats | null>(null);
+  const [modelPrices, setModelPrices] = useState<Record<string, ModelPrice>>({});
 
-  const loadUsage = async () => {
+  // Model price form state
+  const [selectedModel, setSelectedModel] = useState('');
+  const [promptPrice, setPromptPrice] = useState('');
+  const [completionPrice, setCompletionPrice] = useState('');
+
+  // Expanded sections
+  const [expandedApis, setExpandedApis] = useState<Set<string>>(new Set());
+
+  // Chart state
+  const [requestsPeriod, setRequestsPeriod] = useState<'hour' | 'day'>('day');
+  const [tokensPeriod, setTokensPeriod] = useState<'hour' | 'day'>('day');
+  const [chartLines, setChartLines] = useState<string[]>(['all']);
+  const MAX_CHART_LINES = 9;
+
+  const loadUsage = useCallback(async () => {
     setLoading(true);
     setError('');
     try {
       const data = await usageApi.getUsage();
       const payload = data?.usage ?? data;
       setUsage(payload);
-      const stats = await usageApi.getKeyStats(payload);
-      setKeyStats(stats);
     } catch (err: any) {
       setError(err?.message || t('usage_stats.loading_error'));
     } finally {
       setLoading(false);
     }
-  };
+  }, [t]);
 
   useEffect(() => {
     loadUsage();
-  }, []);
+    setModelPrices(loadModelPrices());
+  }, [loadUsage]);
 
-  const overviewItems = [
-    { label: t('usage_stats.total_requests'), value: usage?.total_requests },
-    { label: t('usage_stats.success_requests'), value: usage?.success_requests },
-    { label: t('usage_stats.failed_requests'), value: usage?.failed_requests },
-    { label: t('usage_stats.total_tokens'), value: usage?.total_tokens },
-    { label: t('usage_stats.cached_tokens'), value: usage?.cached_tokens },
-    { label: t('usage_stats.reasoning_tokens'), value: usage?.reasoning_tokens },
-    { label: t('usage_stats.rpm_30m'), value: usage?.rpm_30m },
-    { label: t('usage_stats.tpm_30m'), value: usage?.tpm_30m }
-  ];
+  // Calculate derived data
+  const tokenBreakdown = usage ? calculateTokenBreakdown(usage) : { cachedTokens: 0, reasoningTokens: 0 };
+  const rateStats = usage ? calculateRecentPerMinuteRates(30, usage) : { rpm: 0, tpm: 0 };
+  const totalCost = usage ? calculateTotalCost(usage, modelPrices) : 0;
+  const modelNames = usage ? getModelNamesFromUsage(usage) : [];
+  const apiStats = usage ? getApiStats(usage, modelPrices) : [];
+  const modelStats = usage ? getModelStats(usage, modelPrices) : [];
+  const hasPrices = Object.keys(modelPrices).length > 0;
+
+  // Build chart data
+  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 chartOptions = {
+    responsive: true,
+    maintainAspectRatio: false,
+    interaction: {
+      mode: 'index' as const,
+      intersect: false
+    },
+    plugins: {
+      legend: {
+        display: true,
+        position: 'top' as const,
+        align: 'start' as const,
+        labels: {
+          usePointStyle: true
+        }
+      }
+    },
+    scales: {
+      y: {
+        beginAtZero: true
+      }
+    },
+    elements: {
+      line: {
+        tension: 0.35,
+        borderWidth: 2
+      },
+      point: {
+        borderWidth: 2,
+        radius: 4
+      }
+    }
+  };
+
+  // Chart line management
+  const handleAddChartLine = () => {
+    if (chartLines.length >= MAX_CHART_LINES) return;
+    const unusedModel = modelNames.find(m => !chartLines.includes(m));
+    if (unusedModel) {
+      setChartLines([...chartLines, unusedModel]);
+    } else {
+      setChartLines([...chartLines, 'all']);
+    }
+  };
+
+  const handleRemoveChartLine = (index: number) => {
+    if (chartLines.length <= 1) return;
+    const newLines = [...chartLines];
+    newLines.splice(index, 1);
+    setChartLines(newLines);
+  };
+
+  const handleChartLineChange = (index: number, value: string) => {
+    const newLines = [...chartLines];
+    newLines[index] = value;
+    setChartLines(newLines);
+  };
+
+  // Handle model price save
+  const handleSavePrice = () => {
+    if (!selectedModel) return;
+    const prompt = parseFloat(promptPrice) || 0;
+    const completion = parseFloat(completionPrice) || 0;
+    const newPrices = { ...modelPrices, [selectedModel]: { prompt, completion } };
+    setModelPrices(newPrices);
+    saveModelPrices(newPrices);
+    setSelectedModel('');
+    setPromptPrice('');
+    setCompletionPrice('');
+  };
+
+  // Handle model price delete
+  const handleDeletePrice = (model: string) => {
+    const newPrices = { ...modelPrices };
+    delete newPrices[model];
+    setModelPrices(newPrices);
+    saveModelPrices(newPrices);
+  };
+
+  // Handle edit price
+  const handleEditPrice = (model: string) => {
+    const price = modelPrices[model];
+    setSelectedModel(model);
+    setPromptPrice(price?.prompt?.toString() || '');
+    setCompletionPrice(price?.completion?.toString() || '');
+  };
+
+  // Toggle API expansion
+  const toggleApiExpand = (endpoint: string) => {
+    setExpandedApis(prev => {
+      const newSet = new Set(prev);
+      if (newSet.has(endpoint)) {
+        newSet.delete(endpoint);
+      } else {
+        newSet.add(endpoint);
+      }
+      return newSet;
+    });
+  };
 
   return (
-    <div className="stack">
-      <Card
-        title={t('usage_stats.title')}
-        extra={
-          <Button variant="secondary" size="sm" onClick={loadUsage} disabled={loading}>
-            {t('usage_stats.refresh')}
-          </Button>
-        }
-      >
-        {error && <div className="error-box">{error}</div>}
-        {loading ? (
-          <div className="hint">{t('common.loading')}</div>
-        ) : (
-          <div className="grid cols-2">
-            {overviewItems.map((item) => (
-              <div key={item.label} className="stat-card">
-                <div className="stat-label">{item.label}</div>
-                <div className="stat-value">{item.value ?? '-'}</div>
+    <div className={styles.container}>
+      <div className={styles.header}>
+        <h1 className={styles.pageTitle}>{t('usage_stats.title')}</h1>
+        <Button
+          variant="secondary"
+          size="sm"
+          onClick={loadUsage}
+          disabled={loading}
+        >
+          {loading ? t('common.loading') : t('usage_stats.refresh')}
+        </Button>
+      </div>
+
+      {error && <div className={styles.errorBox}>{error}</div>}
+
+      {/* Stats Overview Cards */}
+      <div className={styles.statsGrid}>
+        {/* Total Requests Card */}
+        <div className={styles.statCard}>
+          <div className={styles.statHeader}>
+            <span className={styles.statIcon}>📊</span>
+            <span className={styles.statLabel}>{t('usage_stats.total_requests')}</span>
+          </div>
+          <div className={styles.statValue}>
+            {loading ? '-' : (usage?.total_requests ?? 0).toLocaleString()}
+          </div>
+          <div className={styles.statMeta}>
+            <span className={styles.statSuccess}>
+              ✓ {t('usage_stats.success_requests')}: {loading ? '-' : (usage?.success_count ?? 0)}
+            </span>
+            <span className={styles.statFailure}>
+              ✗ {t('usage_stats.failed_requests')}: {loading ? '-' : (usage?.failure_count ?? 0)}
+            </span>
+          </div>
+        </div>
+
+        {/* Total Tokens Card */}
+        <div className={styles.statCard}>
+          <div className={styles.statHeader}>
+            <span className={styles.statIcon}>🔤</span>
+            <span className={styles.statLabel}>{t('usage_stats.total_tokens')}</span>
+          </div>
+          <div className={styles.statValue}>
+            {loading ? '-' : formatTokensInMillions(usage?.total_tokens ?? 0)}
+          </div>
+          <div className={styles.statMeta}>
+            <span className={styles.statNeutral}>
+              💾 {t('usage_stats.cached_tokens')}: {loading ? '-' : formatTokensInMillions(tokenBreakdown.cachedTokens)}
+            </span>
+            <span className={styles.statNeutral}>
+              🧠 {t('usage_stats.reasoning_tokens')}: {loading ? '-' : formatTokensInMillions(tokenBreakdown.reasoningTokens)}
+            </span>
+          </div>
+        </div>
+
+        {/* RPM/TPM Card */}
+        <div className={styles.statCard}>
+          <div className={styles.statHeader}>
+            <span className={styles.statIcon}>⚡</span>
+            <span className={styles.statLabel}>{t('usage_stats.rate_30m')}</span>
+          </div>
+          <div className={styles.statValueRow}>
+            <div className={styles.statValueSmall}>
+              <span className={styles.statValueLabel}>{t('usage_stats.rpm_30m')}</span>
+              <span className={styles.statValueNum}>{loading ? '-' : formatPerMinuteValue(rateStats.rpm)}</span>
+            </div>
+            <div className={styles.statValueSmall}>
+              <span className={styles.statValueLabel}>{t('usage_stats.tpm_30m')}</span>
+              <span className={styles.statValueNum}>{loading ? '-' : formatPerMinuteValue(rateStats.tpm)}</span>
+            </div>
+          </div>
+        </div>
+
+        {/* Total Cost Card */}
+        <div className={styles.statCard}>
+          <div className={styles.statHeader}>
+            <span className={styles.statIcon}>💰</span>
+            <span className={styles.statLabel}>{t('usage_stats.total_cost')}</span>
+          </div>
+          <div className={styles.statValue}>
+            {loading ? '-' : hasPrices ? formatUsd(totalCost) : '--'}
+          </div>
+          {!hasPrices && (
+            <div className={styles.statMeta}>
+              <span className={styles.statHint}>{t('usage_stats.cost_need_price')}</span>
+            </div>
+          )}
+        </div>
+      </div>
+
+      {/* Chart Line Selection */}
+      <Card title={t('usage_stats.chart_line_actions_label')}>
+        <div className={styles.chartLineControls}>
+          <div className={styles.chartLineList}>
+            {chartLines.map((line, index) => (
+              <div key={index} className={styles.chartLineItem}>
+                <span className={styles.chartLineLabel}>
+                  {t(`usage_stats.chart_line_label_${index + 1}`)}:
+                </span>
+                <select
+                  value={line}
+                  onChange={(e) => handleChartLineChange(index, e.target.value)}
+                  className={styles.select}
+                >
+                  <option value="all">{t('usage_stats.chart_line_all')}</option>
+                  {modelNames.map((name) => (
+                    <option key={name} value={name}>{name}</option>
+                  ))}
+                </select>
+                {chartLines.length > 1 && (
+                  <Button
+                    variant="danger"
+                    size="sm"
+                    onClick={() => handleRemoveChartLine(index)}
+                  >
+                    {t('usage_stats.chart_line_delete')}
+                  </Button>
+                )}
               </div>
             ))}
           </div>
+          <div className={styles.chartLineActions}>
+            <span className={styles.chartLineCount}>
+              {chartLines.length}/{MAX_CHART_LINES}
+            </span>
+            <Button
+              variant="secondary"
+              size="sm"
+              onClick={handleAddChartLine}
+              disabled={chartLines.length >= MAX_CHART_LINES}
+            >
+              {t('usage_stats.chart_line_add')}
+            </Button>
+          </div>
+        </div>
+        <p className={styles.chartLineHint}>{t('usage_stats.chart_line_hint')}</p>
+      </Card>
+
+      {/* Requests Chart */}
+      <Card
+        title={t('usage_stats.requests_trend')}
+        extra={
+          <div className={styles.periodButtons}>
+            <Button
+              variant={requestsPeriod === 'hour' ? 'primary' : 'secondary'}
+              size="sm"
+              onClick={() => setRequestsPeriod('hour')}
+            >
+              {t('usage_stats.by_hour')}
+            </Button>
+            <Button
+              variant={requestsPeriod === 'day' ? 'primary' : 'secondary'}
+              size="sm"
+              onClick={() => setRequestsPeriod('day')}
+            >
+              {t('usage_stats.by_day')}
+            </Button>
+          </div>
+        }
+      >
+        {loading ? (
+          <div className={styles.hint}>{t('common.loading')}</div>
+        ) : requestsChartData.labels.length > 0 ? (
+          <div className={styles.chartWrapper}>
+            <Line data={requestsChartData} options={chartOptions} />
+          </div>
+        ) : (
+          <div className={styles.hint}>{t('usage_stats.no_data')}</div>
         )}
       </Card>
 
+      {/* Tokens Chart */}
+      <Card
+        title={t('usage_stats.tokens_trend')}
+        extra={
+          <div className={styles.periodButtons}>
+            <Button
+              variant={tokensPeriod === 'hour' ? 'primary' : 'secondary'}
+              size="sm"
+              onClick={() => setTokensPeriod('hour')}
+            >
+              {t('usage_stats.by_hour')}
+            </Button>
+            <Button
+              variant={tokensPeriod === 'day' ? 'primary' : 'secondary'}
+              size="sm"
+              onClick={() => setTokensPeriod('day')}
+            >
+              {t('usage_stats.by_day')}
+            </Button>
+          </div>
+        }
+      >
+        {loading ? (
+          <div className={styles.hint}>{t('common.loading')}</div>
+        ) : tokensChartData.labels.length > 0 ? (
+          <div className={styles.chartWrapper}>
+            <Line data={tokensChartData} options={chartOptions} />
+          </div>
+        ) : (
+          <div className={styles.hint}>{t('usage_stats.no_data')}</div>
+        )}
+      </Card>
+
+      {/* API Key Statistics */}
       <Card title={t('usage_stats.api_details')}>
         {loading ? (
-          <div className="hint">{t('common.loading')}</div>
-        ) : keyStats && Object.keys(keyStats.bySource || {}).length ? (
-          <div className="table">
-            <div className="table-header">
-              <div>{t('usage_stats.api_endpoint')}</div>
-              <div>{t('stats.success')}</div>
-              <div>{t('stats.failure')}</div>
-            </div>
-            {Object.entries(keyStats.bySource || {}).map(([source, bucket]) => (
-              <div key={source} className="table-row">
-                <div className="cell item-subtitle">{source}</div>
-                <div className="cell">{bucket.success}</div>
-                <div className="cell">{bucket.failure}</div>
+          <div className={styles.hint}>{t('common.loading')}</div>
+        ) : apiStats.length > 0 ? (
+          <div className={styles.apiList}>
+            {apiStats.map((api) => (
+              <div key={api.endpoint} className={styles.apiItem}>
+                <div
+                  className={styles.apiHeader}
+                  onClick={() => toggleApiExpand(api.endpoint)}
+                >
+                  <div className={styles.apiInfo}>
+                    <span className={styles.apiEndpoint}>{api.endpoint}</span>
+                    <div className={styles.apiStats}>
+                      <span className={styles.apiBadge}>
+                        {t('usage_stats.requests_count')}: {api.totalRequests}
+                      </span>
+                      <span className={styles.apiBadge}>
+                        Tokens: {formatTokensInMillions(api.totalTokens)}
+                      </span>
+                      {hasPrices && api.totalCost > 0 && (
+                        <span className={styles.apiBadge}>
+                          {t('usage_stats.total_cost')}: {formatUsd(api.totalCost)}
+                        </span>
+                      )}
+                    </div>
+                  </div>
+                  <span className={styles.expandIcon}>
+                    {expandedApis.has(api.endpoint) ? '▼' : '▶'}
+                  </span>
+                </div>
+                {expandedApis.has(api.endpoint) && (
+                  <div className={styles.apiModels}>
+                    {Object.entries(api.models).map(([model, stats]) => (
+                      <div key={model} className={styles.modelRow}>
+                        <span className={styles.modelName}>{model}</span>
+                        <span className={styles.modelStat}>{stats.requests} {t('usage_stats.requests_count')}</span>
+                        <span className={styles.modelStat}>{formatTokensInMillions(stats.tokens)}</span>
+                      </div>
+                    ))}
+                  </div>
+                )}
               </div>
             ))}
           </div>
         ) : (
-          <div className="hint">{t('usage_stats.no_data')}</div>
+          <div className={styles.hint}>{t('usage_stats.no_data')}</div>
         )}
       </Card>
+
+      {/* Model Statistics */}
+      <Card title={t('usage_stats.models')}>
+        {loading ? (
+          <div className={styles.hint}>{t('common.loading')}</div>
+        ) : modelStats.length > 0 ? (
+          <div className={styles.tableWrapper}>
+            <table className={styles.table}>
+              <thead>
+                <tr>
+                  <th>{t('usage_stats.model_name')}</th>
+                  <th>{t('usage_stats.requests_count')}</th>
+                  <th>{t('usage_stats.tokens_count')}</th>
+                  {hasPrices && <th>{t('usage_stats.total_cost')}</th>}
+                </tr>
+              </thead>
+              <tbody>
+                {modelStats.map((stat) => (
+                  <tr key={stat.model}>
+                    <td className={styles.modelCell}>{stat.model}</td>
+                    <td>{stat.requests.toLocaleString()}</td>
+                    <td>{formatTokensInMillions(stat.tokens)}</td>
+                    {hasPrices && <td>{stat.cost > 0 ? formatUsd(stat.cost) : '--'}</td>}
+                  </tr>
+                ))}
+              </tbody>
+            </table>
+          </div>
+        ) : (
+          <div className={styles.hint}>{t('usage_stats.no_data')}</div>
+        )}
+      </Card>
+
+      {/* Model Pricing Configuration */}
+      <Card title={t('usage_stats.model_price_settings')}>
+        <div className={styles.pricingSection}>
+          {/* Price Form */}
+          <div className={styles.priceForm}>
+            <div className={styles.formRow}>
+              <div className={styles.formField}>
+                <label>{t('usage_stats.model_name')}</label>
+                <select
+                  value={selectedModel}
+                  onChange={(e) => {
+                    setSelectedModel(e.target.value);
+                    const price = modelPrices[e.target.value];
+                    if (price) {
+                      setPromptPrice(price.prompt.toString());
+                      setCompletionPrice(price.completion.toString());
+                    } else {
+                      setPromptPrice('');
+                      setCompletionPrice('');
+                    }
+                  }}
+                  className={styles.select}
+                >
+                  <option value="">{t('usage_stats.model_price_select_placeholder')}</option>
+                  {modelNames.map((name) => (
+                    <option key={name} value={name}>{name}</option>
+                  ))}
+                </select>
+              </div>
+              <div className={styles.formField}>
+                <label>{t('usage_stats.model_price_prompt')} ($/1M)</label>
+                <Input
+                  type="number"
+                  value={promptPrice}
+                  onChange={(e) => setPromptPrice(e.target.value)}
+                  placeholder="0.00"
+                  step="0.0001"
+                />
+              </div>
+              <div className={styles.formField}>
+                <label>{t('usage_stats.model_price_completion')} ($/1M)</label>
+                <Input
+                  type="number"
+                  value={completionPrice}
+                  onChange={(e) => setCompletionPrice(e.target.value)}
+                  placeholder="0.00"
+                  step="0.0001"
+                />
+              </div>
+              <Button
+                variant="primary"
+                onClick={handleSavePrice}
+                disabled={!selectedModel}
+              >
+                {t('common.save')}
+              </Button>
+            </div>
+          </div>
+
+          {/* Saved Prices List */}
+          <div className={styles.pricesList}>
+            <h4 className={styles.pricesTitle}>{t('usage_stats.saved_prices')}</h4>
+            {Object.keys(modelPrices).length > 0 ? (
+              <div className={styles.pricesGrid}>
+                {Object.entries(modelPrices).map(([model, price]) => (
+                  <div key={model} className={styles.priceItem}>
+                    <div className={styles.priceInfo}>
+                      <span className={styles.priceModel}>{model}</span>
+                      <div className={styles.priceMeta}>
+                        <span>{t('usage_stats.model_price_prompt')}: ${price.prompt.toFixed(4)}/1M</span>
+                        <span>{t('usage_stats.model_price_completion')}: ${price.completion.toFixed(4)}/1M</span>
+                      </div>
+                    </div>
+                    <div className={styles.priceActions}>
+                      <Button
+                        variant="secondary"
+                        size="sm"
+                        onClick={() => handleEditPrice(model)}
+                      >
+                        {t('common.edit')}
+                      </Button>
+                      <Button
+                        variant="danger"
+                        size="sm"
+                        onClick={() => handleDeletePrice(model)}
+                      >
+                        {t('common.delete')}
+                      </Button>
+                    </div>
+                  </div>
+                ))}
+              </div>
+            ) : (
+              <div className={styles.hint}>{t('usage_stats.model_price_empty')}</div>
+            )}
+          </div>
+        </div>
+      </Card>
     </div>
   );
 }