refactor: split project into web and server directories

- Move frontend to web/ directory
- Add server/ directory for backend
- Restructure project for前后端分离架构

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/src/components/charts/BarChart.vue

@@ -0,0 +1,172 @@
+<template>
+  <div class="bar-chart">
+    <div class="rank-labels">
+      <div v-for="(item, idx) in items" :key="item.name" class="rank-label">
+        <span class="rank-badge" :class="medalClass(idx)">
+          <svg v-if="idx < 3" width="18" height="18" viewBox="0 0 18 18">
+            <circle cx="9" cy="9" r="8" :fill="medalFill(idx)" />
+            <text x="9" y="13" text-anchor="middle" fill="#fff" font-size="10" font-weight="700">{{ idx + 1 }}</text>
+          </svg>
+          <template v-else>{{ idx + 1 }}</template>
+        </span>
+        <span class="rank-name">{{ item.name || item.shortName }}</span>
+      </div>
+    </div>
+    <div class="chart-area">
+      <Bar :data="chartData" :options="chartOptions" />
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+import { Bar } from 'vue-chartjs'
+import {
+  Chart as ChartJS,
+  CategoryScale,
+  LinearScale,
+  BarElement,
+  Tooltip
+} from 'chart.js'
+
+ChartJS.register(CategoryScale, LinearScale, BarElement, Tooltip)
+
+const props = defineProps({
+  items: { type: Array, required: true }
+})
+
+const medalClass = (idx) => {
+  if (idx === 0) return 'gold'
+  if (idx === 1) return 'silver'
+  if (idx === 2) return 'bronze'
+  return ''
+}
+
+const medalFill = (idx) => {
+  if (idx === 0) return '#f59e0b'
+  if (idx === 1) return '#94a3b8'
+  if (idx === 2) return '#cd7f32'
+  return '#94a3b8'
+}
+
+const formatValue = (value) => {
+  if (value >= 1_000_000) return `¥${(value / 1_000_000).toFixed(1)}M`
+  if (value >= 1_000) return `¥${(value / 1_000).toFixed(1)}K`
+  return `¥${value}`
+}
+
+const chartData = computed(() => ({
+  labels: props.items.map((i) => i.name || i.shortName),
+  datasets: [{
+    data: props.items.map((i) => i.value || i.amount),
+    backgroundColor: props.items.map((i) => i.color),
+    borderRadius: 6,
+    borderSkipped: false,
+    barPercentage: 0.7,
+    categoryPercentage: 0.85
+  }]
+}))
+
+const chartOptions = {
+  indexAxis: 'y',
+  responsive: true,
+  maintainAspectRatio: false,
+  layout: {
+    padding: { left: 0, right: 12 }
+  },
+  plugins: {
+    legend: { display: false },
+    tooltip: {
+      backgroundColor: 'rgba(255,255,255,0.96)',
+      titleColor: '#1e293b',
+      bodyColor: '#64748b',
+      borderColor: '#e2e8f0',
+      borderWidth: 1,
+      padding: 10,
+      boxPadding: 4,
+      cornerRadius: 6,
+      callbacks: {
+        title: () => '',
+        label: (ctx) => ` ${formatValue(ctx.parsed.x)}`
+      }
+    }
+  },
+  scales: {
+    x: {
+      beginAtZero: true,
+      grid: {
+        color: '#f1f5f9',
+        drawTicks: false
+      },
+      ticks: {
+        color: '#94a3b8',
+        font: { size: 11 },
+        padding: 4,
+        callback: (value) => formatValue(value)
+      },
+      border: { display: false }
+    },
+    y: {
+      grid: { display: false },
+      border: { display: false },
+      ticks: { display: false }
+    }
+  }
+}
+</script>
+
+<style scoped>
+.bar-chart {
+  display: flex;
+  width: 100%;
+  gap: 8px;
+}
+
+.rank-labels {
+  flex: 0 0 auto;
+  display: flex;
+  flex-direction: column;
+  justify-content: space-around;
+  padding: 6px 0;
+}
+
+.rank-label {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  height: 34px;
+  white-space: nowrap;
+}
+
+.rank-badge {
+  width: 20px;
+  height: 20px;
+  display: grid;
+  place-items: center;
+  border-radius: 999px;
+  font-size: 11px;
+  font-weight: 600;
+  color: #fff;
+}
+
+.rank-badge:not(.gold):not(.silver):not(.bronze) {
+  background: #cbd5e1;
+}
+
+.rank-badge svg {
+  display: block;
+}
+
+.rank-name {
+  color: #475569;
+  font-size: 13px;
+  font-weight: 500;
+}
+
+.chart-area {
+  flex: 1;
+  min-width: 0;
+  position: relative;
+  height: 240px;
+}
+</style>