diff --git a/index.html b/index.html
index f8715c5..1ad866f 100755
--- a/index.html
+++ b/index.html
@@ -22,7 +22,6 @@
       --error-text: #a51d2d;
       --shadow: 0 8px 24px rgba(33, 52, 78, 0.07);
     }
-
     * { box-sizing: border-box; }
     body {
       margin: 0;
@@ -31,104 +30,55 @@
       color: var(--text);
       font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
     }
-    .page {
-      width: min(1440px, calc(100% - 32px));
-      margin: 0 auto;
-      padding: 28px 0 36px;
-    }
-    .page-header {
-      display: flex;
-      align-items: flex-start;
-      justify-content: space-between;
-      gap: 24px;
-      margin-bottom: 20px;
-    }
-    h1 {
-      margin: 0 0 6px;
-      font-size: clamp(24px, 3vw, 34px);
-      letter-spacing: -0.02em;
-      line-height: 1.2;
-    }
+    .page { width: min(1440px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 36px; }
+    .page-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 20px; }
+    h1 { margin: 0 0 6px; font-size: clamp(24px, 3vw, 34px); letter-spacing: -0.02em; line-height: 1.2; }
     .subtitle { margin: 0; color: var(--muted); }
-    .status {
-      flex: 0 0 auto;
-      margin-top: 3px;
-      color: var(--muted);
-      text-align: right;
-    }
+    .header-actions { display: grid; gap: 8px; justify-items: end; }
+    .raw-link { color: var(--primary); font-weight: 600; text-decoration: none; }
+    .raw-link:hover, .raw-link:focus { text-decoration: underline; }
+    .status { color: var(--muted); text-align: right; }
     .status[data-state="error"] { color: var(--error-text); }
     .status[data-state="empty"] { color: var(--muted); }
-    .alert {
-      margin: 0 0 18px;
-      padding: 11px 14px;
-      border: 1px solid var(--warning-border);
-      border-radius: 10px;
-      background: var(--warning-bg);
-      color: var(--warning-text);
-    }
+    .alert { margin: 0 0 18px; padding: 11px 14px; border: 1px solid var(--warning-border); border-radius: 10px; background: var(--warning-bg); color: var(--warning-text); }
     .alert[hidden] { display: none; }
-    .metrics {
-      display: grid;
-      grid-template-columns: repeat(4, minmax(0, 1fr));
-      gap: 14px;
-      margin-bottom: 20px;
-    }
-    .metric, .chart-card {
-      border: 1px solid var(--border);
-      border-radius: 14px;
-      background: var(--surface);
-      box-shadow: var(--shadow);
-    }
+    .filters { display: grid; gap: 12px; margin: 0 0 20px; padding: 16px 18px; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); }
+    .filter-row { display: flex; flex-wrap: wrap; align-items: end; gap: 14px 20px; }
+    .filter-group { display: grid; gap: 5px; }
+    .filter-group > span, .filter-group > label { color: var(--muted); font-size: 13px; }
+    .filter-group input, .filter-group select { min-height: 36px; padding: 6px 9px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); font: inherit; }
+    .filter-group select:disabled { background: #f1f4f8; color: var(--muted); }
+    .range-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
+    .range-button { min-height: 36px; padding: 6px 11px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text); cursor: pointer; font: inherit; }
+    .range-button:hover, .range-button:focus, .range-button[data-active="true"] { border-color: var(--primary); color: var(--primary); }
+    .currency-help, .rate-info { color: var(--muted); font-size: 12px; }
+    .rate-info { display: flex; flex-wrap: wrap; gap: 5px 10px; align-items: center; }
+    .rate-info a { color: var(--primary); }
+    .metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-bottom: 20px; }
+    .metric, .chart-card { border: 1px solid var(--border); border-radius: 14px; background: var(--surface); box-shadow: var(--shadow); }
     .metric { padding: 16px 18px; }
-    .metric-label {
-      display: block;
-      margin-bottom: 5px;
-      color: var(--muted);
-      font-size: 13px;
-    }
+    .metric-label { display: block; margin-bottom: 5px; color: var(--muted); font-size: 13px; }
     .metric-value { display: block; font-size: 23px; font-weight: 700; }
-    .charts {
-      display: grid;
-      grid-template-columns: repeat(2, minmax(0, 1fr));
-      gap: 20px;
-    }
+    .charts { display: grid; grid-template-columns: 1fr; gap: 20px; }
     .chart-card { min-width: 0; padding: 18px 18px 10px; }
     .chart-card h2 { margin: 0 0 2px; font-size: 18px; }
     .chart-card p { margin: 0; color: var(--muted); font-size: 13px; }
     .chart { width: 100%; height: 450px; margin-top: 8px; }
-    .empty-state {
-      display: grid;
-      min-height: 260px;
-      place-items: center;
-      padding: 28px;
-      border: 1px dashed var(--border);
-      border-radius: 14px;
-      background: var(--surface);
-      color: var(--muted);
-      text-align: center;
-    }
-    .error-state {
-      margin-top: 20px;
-      padding: 16px 18px;
-      border: 1px solid var(--error-border);
-      border-radius: 12px;
-      background: var(--error-bg);
-      color: var(--error-text);
-    }
-    .error-state[hidden], .metrics[hidden], .charts[hidden], .empty-state[hidden] { display: none; }
-    @media (max-width: 980px) {
-      .charts { grid-template-columns: 1fr; }
-      .chart { height: 400px; }
-    }
+    .empty-state { display: grid; min-height: 260px; place-items: center; padding: 28px; border: 1px dashed var(--border); border-radius: 14px; background: var(--surface); color: var(--muted); text-align: center; }
+    .error-state { margin-top: 20px; padding: 16px 18px; border: 1px solid var(--error-border); border-radius: 12px; background: var(--error-bg); color: var(--error-text); }
+    .error-state[hidden], .filters[hidden], .metrics[hidden], .charts[hidden], .empty-state[hidden] { display: none; }
     @media (max-width: 640px) {
       .page { width: min(100% - 20px, 1440px); padding-top: 18px; }
       .page-header { display: block; }
-      .status { margin-top: 10px; text-align: left; }
+      .header-actions { justify-items: start; margin-top: 10px; }
+      .status { text-align: left; }
       .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
       .metric { padding: 13px 14px; }
       .metric-value { font-size: 20px; }
       .chart-card { padding: 14px 10px 8px; }
       .chart { height: 360px; }
+      .filter-row { align-items: stretch; }
+      .filter-group { flex: 1 1 145px; }
     }
   </style>
 </head>
@@ -139,10 +89,46 @@
         <h1 id="page-title">TTSHOP 销售看板</h1>
         <p class="subtitle" id="page-subtitle">Commission 与 GMV 趋势</p>
       </div>
-      <div class="status" id="status" data-state="loading" role="status" aria-live="polite">正在加载数据…</div>
+      <div class="header-actions">
+        <a class="raw-link" href="data/merged.html" target="_blank" rel="noopener">查看原始数据</a>
+        <div class="status" id="status" data-state="loading" role="status" aria-live="polite">正在加载数据…</div>
+      </div>
     </header>
 
-    <div class="alert" id="currency-warning" role="alert" hidden></div>
+    <div class="alert" id="data-warning" role="alert" hidden></div>
+
+    <section class="filters" id="filters" aria-label="筛选与换算" hidden>
+      <div class="filter-row">
+        <div class="filter-group">
+          <label for="currency-select">显示币种</label>
+          <select id="currency-select"></select>
+        </div>
+        <div class="filter-group">
+          <span>日期范围</span>
+          <div class="range-actions">
+            <button class="range-button" type="button" data-range="month">当月（按数据最新月份）</button>
+            <button class="range-button" type="button" data-range="recent">最近30天（按数据最新日期）</button>
+            <button class="range-button" type="button" data-range="all">全部</button>
+          </div>
+        </div>
+      </div>
+      <div class="filter-row">
+        <div class="filter-group">
+          <label for="start-date">开始日期</label>
+          <input id="start-date" type="date">
+        </div>
+        <div class="filter-group">
+          <label for="end-date">结束日期</label>
+          <input id="end-date" type="date">
+        </div>
+        <div class="currency-help" id="currency-help"></div>
+      </div>
+      <div class="rate-info" id="rate-info">
+        <span id="rate-status">尚未需要汇率换算</span>
+        <a href="https://www.exchangerate-api.com" target="_blank" rel="noopener">汇率来源</a>
+        <span>公开接口通常每日更新，不承诺分钟级实时。</span>
+      </div>
+    </section>
 
     <section class="metrics" id="metrics" aria-label="数据概览" hidden>
       <div class="metric"><span class="metric-label">数据更新时间</span><strong class="metric-value" id="updated-at">—</strong></div>
@@ -174,19 +160,28 @@
       'use strict';
 
       var DATA_URL = 'data/merged.html';
+      var RATES_URL = 'https://open.er-api.com/v6/latest/USD';
       var REQUIRED_FIELDS = ['Date', 'Commission', 'Order', 'GMV', 'Currency', 'LinkName'];
       var charts = [];
+      var ratesData = null;
+      var ratesPromise = null;
+      var renderToken = 0;
       var numberFormatter = new Intl.NumberFormat('en-US', { maximumFractionDigits: 2 });
       var dateFormatter = new Intl.DateTimeFormat('zh-CN', {
-        year: 'numeric', month: '2-digit', day: '2-digit',
-        hour: '2-digit', minute: '2-digit', second: '2-digit'
+        year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit'
       });
-
       var elements = {
         title: document.getElementById('page-title'),
         subtitle: document.getElementById('page-subtitle'),
         status: document.getElementById('status'),
-        warning: document.getElementById('currency-warning'),
+        warning: document.getElementById('data-warning'),
+        filters: document.getElementById('filters'),
+        currency: document.getElementById('currency-select'),
+        currencyHelp: document.getElementById('currency-help'),
+        startDate: document.getElementById('start-date'),
+        endDate: document.getElementById('end-date'),
+        rangeButtons: Array.from(document.querySelectorAll('[data-range]')),
+        rateStatus: document.getElementById('rate-status'),
         metrics: document.getElementById('metrics'),
         updatedAt: document.getElementById('updated-at'),
         recordCount: document.getElementById('record-count'),
@@ -200,21 +195,20 @@
         overview: document.getElementById('overview-chart'),
         link: document.getElementById('link-chart')
       };
+      var state = { rawRecords: [], sourceCurrencies: [], selectedCurrency: '', latestDate: null, dateOnlyRows: 0, invalidCurrencyRows: 0 };
 
-      function setStatus(message, state) {
+      function setStatus(message, status) {
         elements.status.textContent = message;
-        elements.status.dataset.state = state || '';
+        elements.status.dataset.state = status || '';
       }
 
-      function formatNumber(value) {
-        return numberFormatter.format(Number(value) || 0);
-      }
+      function formatNumber(value) { return numberFormatter.format(Number(value) || 0); }
 
       function parseNumber(value) {
         var normalized = String(value == null ? '' : value).trim().replace(/,/g, '');
-        if (!normalized) return 0;
+        if (!normalized) return null;
         var parsed = Number(normalized);
-        return Number.isFinite(parsed) ? parsed : 0;
+        return Number.isFinite(parsed) ? parsed : null;
       }
 
       function parseDate(value) {
@@ -226,28 +220,23 @@
         var day = Number(match[3]);
         var date = new Date(Date.UTC(year, month - 1, day));
         if (date.getUTCFullYear() !== year || date.getUTCMonth() !== month - 1 || date.getUTCDate() !== day) return null;
-        return {
-          key: year + '-' + String(month).padStart(2, '0') + '-' + String(day).padStart(2, '0'),
-          label: year + '/' + month + '/' + day,
-          time: date.getTime()
-        };
+        return { key: year + '-' + String(month).padStart(2, '0') + '-' + String(day).padStart(2, '0'), label: year + '/' + month + '/' + day, time: date.getTime() };
       }
 
       function readTable(htmlText) {
-        var documentParser = new DOMParser();
-        var parsedDocument = documentParser.parseFromString(htmlText, 'text/html');
+        var parsedDocument = new DOMParser().parseFromString(htmlText, 'text/html');
         var tables = parsedDocument.querySelectorAll('table');
         if (tables.length !== 1) throw new Error('数据文件必须包含唯一 table。');
-
         var rows = Array.from(tables[0].querySelectorAll('tr'));
-        if (!rows.length) return [];
+        if (!rows.length) return { records: [], dateOnlyRows: 0, invalidCurrencyRows: 0 };
         var headers = Array.from(rows[0].children).map(function (cell) { return cell.textContent.trim(); });
         var positions = {};
         headers.forEach(function (header, index) { positions[header] = index; });
         var missing = REQUIRED_FIELDS.filter(function (field) { return positions[field] === undefined; });
         if (missing.length) throw new Error('数据缺少字段：' + missing.join('、'));
-
-        return rows.slice(1).map(function (row) {
+        var dateOnlyRows = 0;
+        var invalidCurrencyRows = 0;
+        var records = rows.slice(1).map(function (row) {
           var cells = Array.from(row.children);
           function cell(field) {
             var index = positions[field];
@@ -255,160 +244,245 @@
           }
           var parsedDate = parseDate(cell('Date'));
           if (!parsedDate) return null;
-          return {
-            date: parsedDate,
-            commission: parseNumber(cell('Commission')),
-            gmv: parseNumber(cell('GMV')),
-            currency: cell('Currency') || 'Unknown',
-            linkName: cell('LinkName') || 'Unknown'
-          };
+          var commission = parseNumber(cell('Commission'));
+          var gmv = parseNumber(cell('GMV'));
+          if (commission === null && gmv === null) {
+            dateOnlyRows += 1;
+            return null;
+          }
+          var currency = cell('Currency').toUpperCase();
+          if (!/^[A-Z]{3}$/.test(currency) || currency === 'UNK' || currency === 'UNKNOWN') {
+            invalidCurrencyRows += 1;
+            return null;
+          }
+          return { date: parsedDate, commission: commission, gmv: gmv, currency: currency, linkName: cell('LinkName') || 'Unknown' };
         }).filter(Boolean);
+        return { records: records, dateOnlyRows: dateOnlyRows, invalidCurrencyRows: invalidCurrencyRows };
+      }
+
+      function disposeCharts() {
+        charts.forEach(function (chart) { chart.dispose(); });
+        charts = [];
+      }
+
+      function updateNotice() {
+        var messages = [];
+        if (state.dateOnlyRows) messages.push('已过滤 ' + formatNumber(state.dateOnlyRows) + ' 条只有 Date、Commission 和 GMV 均为空的日期行。');
+        if (state.invalidCurrencyRows) messages.push('已排除 ' + formatNumber(state.invalidCurrencyRows) + ' 条币种为空、Unknown 或格式无效且包含金额的记录，请检查原始数据。');
+        if (state.sourceCurrencies.length > 1) messages.push('检测到多个已知源币种（' + state.sourceCurrencies.join('、') + '），已统一换算为 USD，不能切换到 IDR。');
+        elements.warning.textContent = messages.join(' ');
+        elements.warning.hidden = messages.length === 0;
+      }
+
+      function setRateStatus(message) { elements.rateStatus.textContent = message; }
+
+      function updateCurrencyOptions() {
+        elements.currency.replaceChildren();
+        var sourceCurrencies = state.sourceCurrencies;
+        var options = [];
+        if (sourceCurrencies.length > 1) {
+          options = ['USD'];
+          state.selectedCurrency = 'USD';
+          elements.currency.disabled = true;
+          elements.currencyHelp.textContent = '多个源币种已自动统一为 USD。';
+        } else if (sourceCurrencies.length === 1) {
+          var source = sourceCurrencies[0];
+          options = source === 'USD' ? ['USD'] : [source, 'USD'];
+          state.selectedCurrency = source === 'IDR' ? 'IDR' : source;
+          elements.currency.disabled = options.length === 1;
+          elements.currencyHelp.textContent = options.length > 1 ? '可在源币种与 USD 之间切换。' : '当前数据已经是 USD。';
+        } else {
+          options = ['USD'];
+          state.selectedCurrency = 'USD';
+          elements.currency.disabled = true;
+          elements.currencyHelp.textContent = '';
+        }
+        options.forEach(function (currency) {
+          var option = document.createElement('option');
+          option.value = currency;
+          option.textContent = currency;
+          elements.currency.appendChild(option);
+        });
+        elements.currency.value = state.selectedCurrency;
+      }
+
+      function updateRangeInputs() {
+        var dates = state.rawRecords.map(function (record) { return record.date; }).sort(function (a, b) { return a.time - b.time; });
+        if (!dates.length) return;
+        var first = dates[0];
+        var latest = dates[dates.length - 1];
+        state.latestDate = latest;
+        elements.startDate.min = first.key;
+        elements.startDate.max = latest.key;
+        elements.endDate.min = first.key;
+        elements.endDate.max = latest.key;
+        setRange('month');
+      }
+
+      function setRange(rangeName) {
+        if (!state.latestDate || !state.rawRecords.length) return;
+        var dates = state.rawRecords.map(function (record) { return record.date; }).sort(function (a, b) { return a.time - b.time; });
+        var first = dates[0];
+        var latest = dates[dates.length - 1];
+        var start = first;
+        if (rangeName === 'month') start = parseDate(latest.key.slice(0, 7) + '-01');
+        if (rangeName === 'recent') start = new Date(latest.time - 29 * 24 * 60 * 60 * 1000);
+        var startKey = rangeName === 'recent' ? new Date(Date.UTC(start.getUTCFullYear(), start.getUTCMonth(), start.getUTCDate())).toISOString().slice(0, 10) : start.key;
+        elements.startDate.value = startKey < first.key ? first.key : startKey;
+        elements.endDate.value = latest.key;
+        elements.rangeButtons.forEach(function (button) { button.dataset.active = button.dataset.range === rangeName ? 'true' : 'false'; });
+      }
+
+      function currentRange() {
+        var start = parseDate(elements.startDate.value);
+        var end = parseDate(elements.endDate.value);
+        if (!start || !end || start.time > end.time) throw new Error('开始日期必须早于或等于结束日期。');
+        return { start: start.time, end: end.time };
+      }
+
+      function needsRates() {
+        return state.rawRecords.some(function (record) { return record.currency !== state.selectedCurrency; });
+      }
+
+      function rateTimestamp(data) {
+        if (data.time_last_update_utc) return new Date(data.time_last_update_utc);
+        if (data.time_last_update_unix) return new Date(data.time_last_update_unix * 1000);
+        return null;
+      }
+
+      function fetchRates() {
+        if (ratesData) return Promise.resolve(ratesData);
+        if (ratesPromise) return ratesPromise;
+        setRateStatus('正在加载公开汇率…');
+        ratesPromise = fetch(RATES_URL, { cache: 'no-store' }).then(function (response) {
+          if (!response.ok) throw new Error('汇率接口 HTTP ' + response.status + '。');
+          return response.json();
+        }).then(function (data) {
+          if (!data || data.result !== 'success' || !data.rates) throw new Error('汇率接口返回无效数据。');
+          ratesData = data;
+          var updated = rateTimestamp(data);
+          setRateStatus('汇率已更新：' + (updated && !Number.isNaN(updated.getTime()) ? dateFormatter.format(updated) : '接口未提供时间'));
+          return data;
+        }).catch(function (error) {
+          ratesPromise = null;
+          setRateStatus('汇率加载失败');
+          throw error;
+        });
+        return ratesPromise;
+      }
+
+      function convertValue(value, source, target, data) {
+        if (value === null || source === target) return value;
+        var sourceRate = Number(data.rates[source]);
+        var targetRate = Number(data.rates[target]);
+        if (source !== 'USD' && (!Number.isFinite(sourceRate) || sourceRate <= 0)) throw new Error('汇率接口不支持源币种 ' + source + '。');
+        if (target !== 'USD' && (!Number.isFinite(targetRate) || targetRate <= 0)) throw new Error('汇率接口不支持目标币种 ' + target + '。');
+        if (target === 'USD') return value / sourceRate;
+        if (source === 'USD') return value * targetRate;
+        return value / sourceRate * targetRate;
+      }
+
+      function convertedRecords() {
+        var conversion = needsRates() ? fetchRates() : Promise.resolve(null);
+        return conversion.then(function (data) {
+          return state.rawRecords.map(function (record) {
+            return {
+              date: record.date,
+              commission: convertValue(record.commission, record.currency, state.selectedCurrency, data),
+              gmv: convertValue(record.gmv, record.currency, state.selectedCurrency, data),
+              linkName: record.linkName
+            };
+          });
+        });
+      }
+
+      function updateSummary(records) {
+        var links = new Set(records.map(function (record) { return record.linkName; }));
+        elements.title.textContent = 'TTSHOP 销售看板 · ' + state.selectedCurrency;
+        elements.subtitle.textContent = 'Commission 与 GMV 趋势（当前加载时间：' + dateFormatter.format(new Date()) + '）';
+        elements.updatedAt.textContent = dateFormatter.format(new Date());
+        elements.recordCount.textContent = formatNumber(records.length);
+        elements.linkCount.textContent = formatNumber(links.size);
+        elements.currencyCount.textContent = state.sourceCurrencies.join('、') || '—';
       }
 
       function aggregate(records) {
         var byDate = new Map();
         var byLink = new Map();
         records.forEach(function (record) {
-          if (!byDate.has(record.date.key)) {
-            byDate.set(record.date.key, { date: record.date, commission: 0, gmv: 0 });
-          }
+          if (!byDate.has(record.date.key)) byDate.set(record.date.key, { date: record.date, commission: 0, gmv: 0 });
           var dateTotal = byDate.get(record.date.key);
-          dateTotal.commission += record.commission;
-          dateTotal.gmv += record.gmv;
-
+          dateTotal.commission += record.commission === null ? 0 : record.commission;
+          dateTotal.gmv += record.gmv === null ? 0 : record.gmv;
           if (!byLink.has(record.linkName)) byLink.set(record.linkName, new Map());
           var linkDates = byLink.get(record.linkName);
-          if (!linkDates.has(record.date.key)) {
-            linkDates.set(record.date.key, { date: record.date, commission: 0, gmv: 0 });
-          }
+          if (!linkDates.has(record.date.key)) linkDates.set(record.date.key, { date: record.date, commission: 0, gmv: 0 });
           var linkTotal = linkDates.get(record.date.key);
-          linkTotal.commission += record.commission;
-          linkTotal.gmv += record.gmv;
+          linkTotal.commission += record.commission === null ? 0 : record.commission;
+          linkTotal.gmv += record.gmv === null ? 0 : record.gmv;
+        });
+        return { dates: Array.from(byDate.values()).sort(function (a, b) { return a.date.time - b.date.time; }), byLink: byLink };
+      }
+
+      function escapeHtml(value) {
+        return String(value == null ? '' : value).replace(/[&<>\"']/g, function (character) {
+          return { '&': '&amp;', '<': '&lt;', '>': '&gt;', '\"': '&quot;', "'": '&#39;' }[character];
         });
-        var dates = Array.from(byDate.values()).sort(function (a, b) { return a.date.time - b.date.time; });
-        return { dates: dates, byLink: byLink };
       }
 
       function tooltipFormatter(params) {
         var items = Array.isArray(params) ? params : [params];
         var date = items.length && items[0].axisValue ? items[0].axisValue : '';
-        var lines = [date];
+        var lines = [escapeHtml(date)];
         items.forEach(function (item) {
           var value = Array.isArray(item.value) ? item.value[item.value.length - 1] : item.value;
           var metric = /GMV$/.test(item.seriesName) ? 'GMV' : 'Commission';
-          lines.push(item.marker + ' ' + item.seriesName + '：' + metric + ' ' + formatNumber(value));
+          lines.push(item.marker + ' ' + escapeHtml(item.seriesName) + '：' + metric + ' ' + formatNumber(value));
         });
         return lines.join('<br>');
       }
 
-      function axisLabelFormatter(value) { return value; }
-
       function makeCommonXAxis(categories) {
-        return {
-          type: 'category',
-          data: categories,
-          boundaryGap: true,
-          axisLabel: { interval: categories.length > 30 ? Math.ceil(categories.length / 15) - 1 : 0, rotate: categories.length > 14 ? 30 : 0 }
-        };
+        return { type: 'category', data: categories, boundaryGap: true, axisLabel: { interval: categories.length > 30 ? Math.ceil(categories.length / 15) - 1 : 0, rotate: categories.length > 14 ? 30 : 0 } };
       }
 
-      function renderCharts(records, currencyLabel) {
+      function renderCharts(records) {
+        if (!window.echarts) throw new Error('ECharts 未加载。');
         var aggregated = aggregate(records);
         var dates = aggregated.dates.map(function (item) { return item.date.label; });
-        var commissionAxisName = 'Commission (' + currencyLabel + ')';
-        var gmvAxisName = 'GMV (' + currencyLabel + ')';
-
-        var overviewOption = {
-          animation: false,
-          color: ['#2563eb', '#f59e0b'],
-          tooltip: { trigger: 'axis', axisPointer: { type: 'cross' }, formatter: tooltipFormatter },
-          legend: { type: 'scroll', top: 2, data: ['Commission', 'GMV'] },
-          grid: { left: 70, right: 76, top: 52, bottom: 62 },
-          xAxis: makeCommonXAxis(dates),
-          yAxis: [
-            { type: 'value', name: commissionAxisName, nameLocation: 'middle', nameGap: 52, axisLabel: { formatter: axisLabelFormatter } },
-            { type: 'value', name: gmvAxisName, nameLocation: 'middle', nameGap: 58, axisLabel: { formatter: axisLabelFormatter } }
-          ],
-          series: [
-            {
-              name: 'Commission', type: 'line', yAxisIndex: 0, stack: 'commission-total', smooth: true,
-              symbol: 'circle', symbolSize: 6,
-              data: aggregated.dates.map(function (item) { return item.commission; })
-            },
-            {
-              name: 'GMV', type: 'bar', yAxisIndex: 1, stack: 'gmv-total', barMaxWidth: 34,
-              data: aggregated.dates.map(function (item) { return item.gmv; })
-            }
-          ]
-        };
-
+        var commissionAxisName = 'Commission (' + state.selectedCurrency + ')';
+        var gmvAxisName = 'GMV (' + state.selectedCurrency + ')';
+        var yAxes = [
+          { type: 'value', name: commissionAxisName, nameLocation: 'middle', nameGap: 52 },
+          { type: 'value', name: gmvAxisName, nameLocation: 'middle', nameGap: 58 }
+        ];
+        var common = { animation: false, tooltip: { trigger: 'axis', axisPointer: { type: 'cross' }, formatter: tooltipFormatter }, grid: { left: 70, right: 76, top: 52, bottom: 62 }, xAxis: makeCommonXAxis(dates), yAxis: yAxes };
+        var overviewSeries = [
+          { name: 'Commission', type: 'line', yAxisIndex: 0, smooth: true, symbol: 'circle', symbolSize: 6, data: aggregated.dates.map(function (item) { return item.commission; }) },
+          { name: 'GMV', type: 'bar', yAxisIndex: 1, stack: 'gmv-total', barMaxWidth: 34, data: aggregated.dates.map(function (item) { return item.gmv; }) }
+        ];
         var links = Array.from(aggregated.byLink.keys()).sort(function (a, b) { return a.localeCompare(b); });
         var linkSeries = [];
-        links.forEach(function (linkName, linkIndex) {
+        links.forEach(function (linkName) {
           var linkDates = aggregated.byLink.get(linkName);
-          linkSeries.push({
-            name: linkName + ' · Commission', type: 'line', yAxisIndex: 0, stack: 'commission-by-link', smooth: true,
-            symbol: 'circle', symbolSize: 5,
-            data: dates.map(function (_, index) {
-              var item = aggregated.dates[index];
-              var value = linkDates.get(item.date.key);
-              return value ? value.commission : 0;
-            })
-          });
-          linkSeries.push({
-            name: linkName + ' · GMV', type: 'bar', yAxisIndex: 1, stack: 'gmv-by-link', barMaxWidth: 34,
-            data: dates.map(function (_, index) {
-              var item = aggregated.dates[index];
-              var value = linkDates.get(item.date.key);
-              return value ? value.gmv : 0;
-            })
-          });
+          linkSeries.push({ name: linkName + ' · Commission', type: 'line', yAxisIndex: 0, stack: 'commission-by-link', smooth: true, symbol: 'circle', symbolSize: 5, data: dates.map(function (_, index) { var item = aggregated.dates[index]; var value = linkDates.get(item.date.key); return value ? value.commission : 0; }) });
+          linkSeries.push({ name: linkName + ' · GMV', type: 'bar', yAxisIndex: 1, stack: 'gmv-by-link', barMaxWidth: 34, data: dates.map(function (_, index) { var item = aggregated.dates[index]; var value = linkDates.get(item.date.key); return value ? value.gmv : 0; }) });
         });
-        var linkOption = {
-          animation: false,
-          tooltip: { trigger: 'axis', axisPointer: { type: 'cross' }, formatter: tooltipFormatter },
-          legend: { type: 'scroll', top: 2, data: linkSeries.map(function (series) { return series.name; }) },
-          grid: { left: 70, right: 76, top: 52, bottom: 62 },
-          xAxis: makeCommonXAxis(dates),
-          yAxis: [
-            { type: 'value', name: commissionAxisName, nameLocation: 'middle', nameGap: 52, axisLabel: { formatter: axisLabelFormatter } },
-            { type: 'value', name: gmvAxisName, nameLocation: 'middle', nameGap: 58, axisLabel: { formatter: axisLabelFormatter } }
-          ],
-          series: linkSeries
-        };
-
-        charts.forEach(function (chart) { chart.dispose(); });
+        disposeCharts();
         charts = [echarts.init(elements.overview), echarts.init(elements.link)];
-        charts[0].setOption(overviewOption);
-        charts[1].setOption(linkOption);
+        charts[0].setOption(Object.assign({}, common, { color: ['#2563eb', '#f59e0b'], legend: { type: 'scroll', top: 2, data: ['Commission', 'GMV'] }, series: overviewSeries }));
+        charts[1].setOption(Object.assign({}, common, { legend: { type: 'scroll', top: 2, data: linkSeries.map(function (series) { return series.name; }) }, series: linkSeries }));
         elements.overviewDescription.textContent = '按日期汇总 · 主轴 ' + commissionAxisName + ' · 副轴 ' + gmvAxisName;
         elements.linkDescription.textContent = '按日期和 LinkName 堆积 · 主轴 ' + commissionAxisName + ' · 副轴 ' + gmvAxisName;
       }
 
-      function updateSummary(records, currencies) {
-        var links = new Set(records.map(function (record) { return record.linkName; }));
-        var currencyList = Array.from(currencies).sort();
-        var currencyLabel = currencyList.length === 1 ? currencyList[0] : 'Mixed';
-        elements.title.textContent = 'TTSHOP 销售看板 · ' + currencyLabel;
-        elements.subtitle.textContent = 'Commission 与 GMV 趋势（当前加载时间：' + dateFormatter.format(new Date()) + '）';
-        elements.updatedAt.textContent = dateFormatter.format(new Date());
-        elements.recordCount.textContent = formatNumber(records.length);
-        elements.linkCount.textContent = formatNumber(links.size);
-        elements.currencyCount.textContent = currencyList.join('、');
-        if (currencyList.length > 1) {
-          elements.warning.textContent = '检测到多个币种：' + currencyList.join('、') + '。页面不会静默合并币种，图表仅按原始数值展示，请结合币种核对数据。';
-          elements.warning.hidden = false;
-        } else {
-          elements.warning.hidden = true;
-        }
-        return currencyLabel;
-      }
-
-      function showEmpty() {
+      function showEmpty(message) {
+        disposeCharts();
         elements.metrics.hidden = false;
+        elements.empty.textContent = message || '没有可展示的数据。';
         elements.empty.hidden = false;
         elements.charts.hidden = true;
-        setStatus('没有有效记录', 'empty');
+        setStatus('当前范围没有有效记录', 'empty');
       }
 
       function showError(error) {
@@ -420,33 +494,63 @@
         setStatus('数据加载失败', 'error');
       }
 
-      function loadData() {
-        fetch(DATA_URL, { cache: 'no-store' })
-          .then(function (response) {
-            if (!response.ok) throw new Error('无法读取 data/merged.html（HTTP ' + response.status + '）。');
-            return response.text();
-          })
-          .then(function (htmlText) {
-            var records = readTable(htmlText);
-            elements.error.hidden = true;
-            if (!records.length) {
-              showEmpty();
-              return;
-            }
-            var currencies = new Set(records.map(function (record) { return record.currency; }));
-            var currencyLabel = updateSummary(records, currencies);
-            elements.metrics.hidden = false;
-            elements.empty.hidden = true;
-            elements.charts.hidden = false;
-            renderCharts(records, currencyLabel);
-            setStatus('已加载 ' + formatNumber(records.length) + ' 条有效记录', 'ready');
-          })
-          .catch(showError);
+      function renderCurrentView() {
+        var token = ++renderToken;
+        var range;
+        try { range = currentRange(); } catch (error) { showError(error); return; }
+        setStatus(needsRates() ? '正在准备汇率与图表…' : '正在准备图表…', 'loading');
+        convertedRecords().then(function (records) {
+          if (token !== renderToken) return;
+          var filtered = records.filter(function (record) { return record.date.time >= range.start && record.date.time <= range.end; });
+          updateSummary(filtered);
+          elements.error.hidden = true;
+          elements.metrics.hidden = false;
+          if (!filtered.length) { showEmpty(); return; }
+          elements.empty.hidden = true;
+          elements.charts.hidden = false;
+          renderCharts(filtered);
+          setStatus('已加载 ' + formatNumber(filtered.length) + ' 条有效记录', 'ready');
+        }).catch(function (error) {
+          if (token === renderToken) showError(error);
+        });
       }
 
-      window.addEventListener('resize', function () {
-        charts.forEach(function (chart) { chart.resize(); });
+      function loadData() {
+        fetch(DATA_URL, { cache: 'no-store' }).then(function (response) {
+          if (!response.ok) throw new Error('无法读取 data/merged.html（HTTP ' + response.status + '）。');
+          return response.text();
+        }).then(function (htmlText) {
+          var result = readTable(htmlText);
+          state.rawRecords = result.records;
+          state.dateOnlyRows = result.dateOnlyRows;
+          state.invalidCurrencyRows = result.invalidCurrencyRows;
+          state.sourceCurrencies = Array.from(new Set(result.records.map(function (record) { return record.currency; }))).sort();
+          updateNotice();
+          elements.error.hidden = true;
+          elements.filters.hidden = false;
+          updateCurrencyOptions();
+          updateRangeInputs();
+          if (!state.rawRecords.length) { showEmpty('没有可展示的有效数据。'); return; }
+          renderCurrentView();
+        }).catch(showError);
+      }
+
+      elements.currency.addEventListener('change', function () {
+        state.selectedCurrency = elements.currency.value;
+        renderCurrentView();
       });
+      elements.startDate.addEventListener('change', function () {
+        elements.rangeButtons.forEach(function (button) { button.dataset.active = 'false'; });
+        renderCurrentView();
+      });
+      elements.endDate.addEventListener('change', function () {
+        elements.rangeButtons.forEach(function (button) { button.dataset.active = 'false'; });
+        renderCurrentView();
+      });
+      elements.rangeButtons.forEach(function (button) {
+        button.addEventListener('click', function () { setRange(button.dataset.range); renderCurrentView(); });
+      });
+      window.addEventListener('resize', function () { charts.forEach(function (chart) { chart.resize(); }); });
       loadData();
     }());
   </script>