function outdoorHistorySeries(devices, rows) {
  const selectedIds = new Set((devices || []).map(device => device.id));
  const handled = new Set();
  const definitions = [];

  (app.deviceGroups || []).forEach(group => {
    if (!group.outdoor_temperature_device_id) return;
    const members = (group.device_ids || []).filter(id => selectedIds.has(id));
    if (!members.length) return;
    const representative = members.includes(group.outdoor_temperature_device_id) ? group.outdoor_temperature_device_id : members[0];
    if (!rows.some(row => row.device_id === representative && Number.isFinite(historyNumber(row.outdoor_temperature)))) return;
    members.forEach(id => handled.add(id));
    definitions.push({ representative, label: `${group.name} · ${tr('history.sharedOutdoor')}` });
  });

  (devices || []).filter(device => !handled.has(device.id)).forEach(device => {
    if (rows.some(row => row.device_id === device.id && Number.isFinite(historyNumber(row.outdoor_temperature)))) {
      definitions.push({ representative: device.id, label: device.name });
    }
  });

  return definitions.map((item, index) => ({
    label: item.label,
    color: historySeriesColor(index),
    value: row => row.device_id === item.representative ? historyNumber(row.outdoor_temperature) : NaN,
  }));
}

function renderHistorySummary() {
  const host = $('#historySummary'); if (!host) return;
  if (app.historyTab === 'energy') { renderEnergyHistorySummary(); return; }
  if (app.historyTab === 'network') { renderNetworkHistorySummary(); return; }
  const deviceRows = app.historyData.devices, zoneRows = app.historyData.zones, sensorRows = app.historyData.sensors;
  const cards = [
    [tr('history.deviceSamples'), app.historyCounts.devices ?? deviceRows.length, tr('history.greeHistory')],
    [tr('history.zoneSamples'), app.historyCounts.zones ?? zoneRows.length, tr('history.zoneHistory')],
    [tr('history.haSamples'), app.historyCounts.ha ?? sensorRows.length, tr('history.haHistory')],
  ];
  host.innerHTML = cards.map(([label, value, detail]) => `<div class="history-stat"><small>${esc(label)}</small><strong>${esc(value)}</strong><span>${esc(detail)}</span></div>`).join('');
}

function renderOverviewHistory() {
  const host = $('#historyCharts');
  host.innerHTML = historyChartMarkup('overviewIndoorChart', tr('history.allGreeIndoor'), tr('history.allGreeIndoorHint'))
    + historyChartMarkup('overviewOutdoorChart', tr('history.allOutdoor'), tr('history.allOutdoorHint'))
    + historyChartMarkup('overviewZonesChart', tr('history.allZoneControl'), tr('history.allZoneControlHint'));

  const deviceRows = app.historyData.devices;
  const indoorSeries = app.devices.map((device, index) => ({ label: device.name, color: historySeriesColor(index), value: row => !row.zone_id && !row.entity_id && row.device_id === device.id ? historyNumber(row.indoor_temperature) : NaN }));
  drawLineChart($('#overviewIndoorChart'), indoorSeries, deviceRows, { height: 360 }); renderLegend($('#overviewIndoorChartLegend'), indoorSeries);

  const outdoorDeviceSeries = outdoorHistorySeries(app.devices, deviceRows).map(item => ({ ...item, label: item.label.includes(' · ') ? item.label : `${item.label} · ${tr('history.greeOutdoor')}` }));
  const outdoorEntities = [...new Set(app.historyData.sensors.filter(row => row.kind === 'outdoor').map(row => row.entity_id))];
  const outdoorHaSeries = outdoorEntities.map((entity, index) => ({ label: `HA · ${haSensorLabel(entity)}`, color: historySeriesColor(index + outdoorDeviceSeries.length), dash: [6, 4], value: row => row.entity_id === entity ? historyNumber(row.temperature) : NaN }));
  const outdoorRows = [...deviceRows, ...app.historyData.sensors.filter(row => row.kind === 'outdoor')];
  const outdoorSeries = [...outdoorDeviceSeries, ...outdoorHaSeries];
  drawLineChart($('#overviewOutdoorChart'), outdoorSeries, outdoorRows, { height: 320 }); renderLegend($('#overviewOutdoorChartLegend'), outdoorSeries);

  const zoneRows = app.historyData.zones;
  const zoneSeries = app.zones.map((zone, index) => ({ label: zone.name, color: historySeriesColor(index), value: row => row.zone_id === zone.id ? historyNumber(row.control_temperature) : NaN }));
  drawLineChart($('#overviewZonesChart'), zoneSeries, zoneRows, { height: 340 }); renderLegend($('#overviewZonesChartLegend'), zoneSeries);
}

function renderZoneHistory() {
  const selected = app.historyZone;
  const rows = selected === 'all' ? app.historyData.zones : app.historyData.zones.filter(row => row.zone_id === selected);
  const host = $('#historyCharts');
  host.innerHTML = historyChartMarkup('zoneTemperatureChart', tr('history.temperatureOverview'), tr('history.temperatureOverviewHint')) + historyChartMarkup('zoneOperationChart', tr('history.operationOverview'), tr('history.operationOverviewHint'), true);
  if (selected === 'all') {
    const series = app.zones.map((zone, index) => ({ label: zone.name, color: historySeriesColor(index), value: row => row.zone_id === zone.id ? historyNumber(row.control_temperature) : NaN }));
    drawLineChart($('#zoneTemperatureChart'), series, rows, { height: 360 }); renderLegend($('#zoneTemperatureChartLegend'), series);
    const targets = app.zones.map((zone, index) => ({ label: `${zone.name} · ${tr('history.targetShort')}`, color: historySeriesColor(index), dash: [5, 4], value: row => row.zone_id === zone.id ? historyNumber(row.target_temperature) : NaN }));
    drawLineChart($('#zoneOperationChart'), targets, rows, { height: 260 }); renderLegend($('#zoneOperationChartLegend'), targets);
    return;
  }
  const temperatureSeries = [
    { label: tr('history.greeSensor'), color: cssColor('--accent', '#3ecf8e'), value: row => historyNumber(row.gree_temperature) },
    { label: tr('history.roomSensor'), color: cssColor('--info', '#60a5fa'), value: row => historyNumber(row.external_temperature) },
    { label: tr('history.controlTemperature'), color: cssColor('--teal', '#2dd4bf'), width: 2.8, value: row => historyNumber(row.control_temperature) },
    { label: tr('history.comfortTarget'), color: cssColor('--warning', '#f59e0b'), dash: [7, 5], value: row => historyNumber(row.target_temperature) },
    { label: tr('history.deviceSetpoint'), color: cssColor('--purple', '#a78bfa'), dash: [3, 4], value: row => historyNumber(row.device_setpoint) },
    { label: tr('history.outdoorTemperature'), color: cssColor('--muted-strong', '#9ca3af'), dash: [2, 5], value: row => historyNumber(row.outdoor_temperature) },
  ];
  drawLineChart($('#zoneTemperatureChart'), temperatureSeries, rows, { height: 360 }); renderLegend($('#zoneTemperatureChartLegend'), temperatureSeries);
  const operationSeries = [
    { label: tr('history.fanSpeed'), color: cssColor('--info', '#60a5fa'), step: true, value: row => historyNumber(row.fan_speed), tooltipValue: value => fanLabel(Math.round(value)) },
    { label: tr('history.demand'), color: cssColor('--accent', '#3ecf8e'), step: true, width: 2.4, value: row => row.demand ? 4.5 : 0.5, tooltipValue: (_, row) => row.demand ? tr('common.active') : tr('common.disabled') },
    { label: tr('history.power'), color: cssColor('--warning', '#f59e0b'), step: true, dash: [5, 4], value: row => row.power ? 3.5 : 0.5, tooltipValue: (_, row) => row.power ? tr('common.on') : tr('common.off') },
  ];
  drawLineChart($('#zoneOperationChart'), operationSeries, rows, { height: 260, minValue: 0, maxValue: 5, binaryLabels: true }); renderLegend($('#zoneOperationChartLegend'), operationSeries);
}

function renderDeviceHistory() {
  const selected = app.historyDevice;
  const rows = selected === 'all' ? app.historyData.devices : app.historyData.devices.filter(row => row.device_id === selected);
  const host = $('#historyCharts');
  host.innerHTML = historyChartMarkup('deviceIndoorChart', tr('history.deviceIndoor'), tr('history.deviceIndoorHint')) + historyChartMarkup('deviceOutdoorChart', tr('history.deviceOutdoor'), tr('history.deviceOutdoorHint')) + historyChartMarkup('deviceTargetChart', tr('history.deviceTargets'), tr('history.deviceTargetsHint'), true);
  const devices = selected === 'all' ? app.devices : app.devices.filter(device => device.id === selected);
  const indoor = devices.map((device, index) => ({ label: device.name, color: historySeriesColor(index), value: row => row.device_id === device.id ? historyNumber(row.indoor_temperature) : NaN }));
  const outdoor = outdoorHistorySeries(devices, rows);
  const targets = devices.map((device, index) => ({ label: device.name, color: historySeriesColor(index), dash: [6, 4], value: row => row.device_id === device.id ? historyNumber(row.target_temperature) : NaN }));
  drawLineChart($('#deviceIndoorChart'), indoor, rows, { height: 350 }); renderLegend($('#deviceIndoorChartLegend'), indoor);
  drawLineChart($('#deviceOutdoorChart'), outdoor, rows, { height: 310 }); renderLegend($('#deviceOutdoorChartLegend'), outdoor);
  drawLineChart($('#deviceTargetChart'), targets, rows, { height: 260 }); renderLegend($('#deviceTargetChartLegend'), targets);
}

function renderSensorHistory() {
  const selected = app.historySensor;
  const rows = selected === 'all' ? app.historyData.sensors : app.historyData.sensors.filter(row => row.entity_id === selected);
  const entities = [...new Set(rows.map(row => row.entity_id))];
  const host = $('#historyCharts');
  host.innerHTML = historyChartMarkup('haSensorsChart', tr('history.haSensors'), tr('history.haSensorsHint'));
  const series = entities.map((entity, index) => ({ label: haSensorLabel(entity), color: historySeriesColor(index), dash: rows.some(row => row.entity_id === entity && row.kind === 'outdoor') ? [6, 4] : [], value: row => row.entity_id === entity ? historyNumber(row.temperature) : NaN }));
  drawLineChart($('#haSensorsChart'), series, rows, { height: 370 }); renderLegend($('#haSensorsChartLegend'), series);
}

function networkTargetRows() {
  const selected = app.historyNetworkTarget || 'all';
  return selected === 'all' ? (app.historyNetwork || []) : (app.historyNetwork || []).filter(row => row.target_id === selected);
}

function networkTargetLabel(id) {
  return (app.historyNetworkTargets || []).find(target => target.id === id)?.name || id;
}

function renderNetworkHistorySummary() {
  const host = $('#historySummary'); if (!host) return;
  const rows = networkTargetRows();
  const ids = [...new Set(rows.map(row => row.target_id))];
  if (!ids.length) { host.innerHTML = ''; return; }
  host.innerHTML = ids.map(id => {
    const latest = rows.filter(row => row.target_id === id).sort((a, b) => new Date(b.timestamp) - new Date(a.timestamp))[0];
    const latency = Number.isFinite(Number(latest?.latency_ms)) ? `${Number(latest.latency_ms).toLocaleString(locale(), { maximumFractionDigits: 1 })} ms` : '—';
    const jitter = Number.isFinite(Number(latest?.jitter_ms)) ? `${Number(latest.jitter_ms).toLocaleString(locale(), { maximumFractionDigits: 1 })} ms` : '—';
    const loss = `${Number(latest?.packet_loss_pct || 0).toLocaleString(locale(), { maximumFractionDigits: 1 })}%`;
    return `<div class="history-stat"><small>${esc(networkTargetLabel(id))}</small><strong>${esc(latency)}</strong><span>${esc(tr('history.networkJitter'))}: ${esc(jitter)} · ${esc(tr('history.networkLoss'))}: ${esc(loss)} · ${esc(latest?.successful_samples ?? 0)}/${esc(latest?.sample_count ?? 0)}</span></div>`;
  }).join('');
}

function renderNetworkHistory() {
  const host = $('#historyCharts'); if (!host) return;
  renderNetworkHistorySummary();
  const rows = networkTargetRows();
  if (!rows.length) {
    host.innerHTML = `<div class="empty"><strong>${esc(tr('history.networkNoData'))}</strong><span>${esc(tr('history.networkNoDataHint'))}</span></div>`;
    return;
  }
  const ids = [...new Set(rows.map(row => row.target_id))];
  const latencySeries = [];
  const lossSeries = [];
  ids.forEach((id, index) => {
    const label = networkTargetLabel(id);
    const color = historySeriesColor(index);
    latencySeries.push({
      key: `${id}:latency`, label: `${label} · ${tr('history.networkLatency')}`, color,
      value: row => row.target_id === id ? historyNumber(row.latency_ms) : NaN,
      tooltipValue: value => `${Number(value).toLocaleString(locale(), { maximumFractionDigits: 2 })} ms`,
    });
    if (app.historyNetworkShowJitter !== false) latencySeries.push({
      key: `${id}:jitter`, label: `${label} · ${tr('history.networkJitter')}`, color, dash: [7, 5],
      value: row => row.target_id === id ? historyNumber(row.jitter_ms) : NaN,
      tooltipValue: value => `${Number(value).toLocaleString(locale(), { maximumFractionDigits: 2 })} ms`,
    });
    lossSeries.push({
      key: `${id}:loss`, label, color,
      value: row => row.target_id === id ? historyNumber(row.packet_loss_pct) : NaN,
      tooltipValue: value => `${Number(value).toLocaleString(locale(), { maximumFractionDigits: 2 })}%`,
    });
  });
  host.innerHTML = historyChartMarkup('networkLatencyChart', tr('history.networkLatencyJitter'), tr('history.networkLatencyJitterHint'))
    + historyChartMarkup('networkLossChart', tr('history.networkLoss'), tr('history.networkLossHint'));
  drawLineChart($('#networkLatencyChart'), latencySeries, rows, { height: 360, minValue: 0, axisSuffix: ' ms', tooltipUnit: ' ms', axisDigits: 0 });
  renderLegend($('#networkLatencyChartLegend'), latencySeries);
  drawLineChart($('#networkLossChart'), lossSeries, rows, { height: 300, minValue: 0, maxValue: 100, axisSuffix: '%', tooltipUnit: '%', axisDigits: 0 });
  renderLegend($('#networkLossChartLegend'), lossSeries);
}

function customSeriesOptions() {
  const items = [];
  const groupedOutdoorIds = new Set();
  (app.deviceGroups || []).forEach(group => {
    if (!group.outdoor_temperature_device_id) return;
    const representative = (group.device_ids || []).includes(group.outdoor_temperature_device_id)
      ? group.outdoor_temperature_device_id
      : (group.device_ids || [])[0];
    if (!representative) return;
    (group.device_ids || []).forEach(id => groupedOutdoorIds.add(id));
    items.push([`installation|${group.id}|outdoor`, `${group.name} · ${tr('history.sharedOutdoor')}`]);
  });
  app.devices.forEach(device => {
    items.push([`device|${device.id}|indoor`, `${device.name} · ${tr('history.indoorTemperature')}`]);
    if (!groupedOutdoorIds.has(device.id)) items.push([`device|${device.id}|outdoor`, `${device.name} · ${tr('history.greeOutdoor')}`]);
    items.push([`device|${device.id}|target`, `${device.name} · ${tr('history.deviceTarget')}`]);
  });
  app.zones.forEach(zone => {
    items.push([`zone|${zone.id}|control`, `${zone.name} · ${tr('history.controlTemperature')}`]);
    items.push([`zone|${zone.id}|gree`, `${zone.name} · ${tr('history.greeSensor')}`]);
    items.push([`zone|${zone.id}|external`, `${zone.name} · ${tr('history.roomSensor')}`]);
    items.push([`zone|${zone.id}|target`, `${zone.name} · ${tr('history.comfortTarget')}`]);
    items.push([`zone|${zone.id}|device_target`, `${zone.name} · ${tr('history.deviceSetpoint')}`]);
    items.push([`zone|${zone.id}|outdoor`, `${zone.name} · ${tr('history.outdoorTemperature')}`]);
  });
  [...new Set(app.historyData.sensors.map(row => row.entity_id))].forEach(entity => items.push([`ha|${entity}|temperature`, `HA · ${haSensorLabel(entity)}`]));
  return items;
}

function customSeriesDefinition(key, index = 0) {
  const [kind, id, field] = String(key).split('|');
  const color = historySeriesColor(index);
  if (kind === 'device') {
    const device = app.devices.find(item => item.id === id); if (!device) return null;
    const labels = { indoor: tr('history.indoorTemperature'), outdoor: tr('history.greeOutdoor'), target: tr('history.deviceTarget') };
    const fields = { indoor: 'indoor_temperature', outdoor: 'outdoor_temperature', target: 'target_temperature' };
    return { key, label: `${device.name} · ${labels[field] || field}`, color, dash: field === 'target' ? [6, 4] : [], value: row => !row.zone_id && !row.entity_id && row.device_id === id ? historyNumber(row[fields[field]]) : NaN };
  }
  if (kind === 'installation' && field === 'outdoor') {
    const group = (app.deviceGroups || []).find(item => item.id === id); if (!group) return null;
    const representative = (group.device_ids || []).includes(group.outdoor_temperature_device_id)
      ? group.outdoor_temperature_device_id
      : (group.device_ids || [])[0];
    if (!representative) return null;
    return { key, label: `${group.name} · ${tr('history.sharedOutdoor')}`, color, value: row => !row.zone_id && !row.entity_id && row.device_id === representative ? historyNumber(row.outdoor_temperature) : NaN };
  }
  if (kind === 'zone') {
    const zone = app.zones.find(item => item.id === id); if (!zone) return null;
    const fields = { control: ['control_temperature', tr('history.controlTemperature')], gree: ['gree_temperature', tr('history.greeSensor')], external: ['external_temperature', tr('history.roomSensor')], target: ['target_temperature', tr('history.comfortTarget')], device_target: ['device_setpoint', tr('history.deviceSetpoint')], outdoor: ['outdoor_temperature', tr('history.outdoorTemperature')] };
    const info = fields[field]; if (!info) return null;
    return { key, label: `${zone.name} · ${info[1]}`, color, dash: ['target', 'device_target', 'outdoor'].includes(field) ? [6, 4] : [], value: row => row.zone_id === id ? historyNumber(row[info[0]]) : NaN };
  }
  if (kind === 'ha') return { key, label: `HA · ${haSensorLabel(id)}`, color, dash: [3, 4], value: row => row.entity_id === id ? historyNumber(row.temperature) : NaN };
  return null;
}

function persistSavedCharts() {
  localStorage.setItem('gree_controller_saved_charts', JSON.stringify(app.savedCharts.slice(0, 30)));
}

function renderCustomBuilder() {
  const host = $('#historyCustomBuilder'); if (!host) return;
  if (app.historyTab !== 'custom') { host.innerHTML = ''; host.classList.remove('active'); return; }
  host.classList.add('active');
  const options = customSeriesOptions();
  const selected = app.customChartSeries.map((key, index) => customSeriesDefinition(key, index)).filter(Boolean);
  host.innerHTML = `<div class="panel custom-chart-panel"><div class="chart-title-row"><div><h3>${esc(tr('history.customTitle'))}</h3><p>${esc(tr('history.customDescription'))}</p></div></div>
    <div class="custom-chart-add"><select id="customSeriesSelect">${options.map(([value, label]) => `<option value="${esc(value)}">${esc(label)}</option>`).join('')}</select><button class="secondary" data-history-action="add-series">${esc(tr('history.addSeries'))}</button></div>
    <div class="custom-series-list">${selected.length ? selected.map((item, index) => `<span class="custom-series-chip"><i style="--chip-color:${esc(item.color)}"></i>${esc(item.label)}<button data-history-action="remove-series" data-index="${index}" aria-label="${esc(tr('actions.remove'))}">×</button></span>`).join('') : `<span class="field-note">${esc(tr('history.noCustomSeries'))}</span>`}</div>
    <div class="custom-chart-save"><input id="customChartName" placeholder="${esc(tr('history.chartName'))}"><button class="secondary" data-history-action="save-chart">${esc(tr('actions.save'))}</button><button class="primary" data-history-action="copy-chart-link">${esc(tr('history.copyLink'))}</button></div>
    <div class="saved-chart-list">${app.savedCharts.length ? app.savedCharts.map(item => `<div class="saved-chart-row"><button data-history-action="load-chart" data-id="${esc(item.id)}"><strong>${esc(item.name)}</strong><small>${esc(item.series.length)} ${esc(tr('history.series'))}</small></button><button class="danger" data-history-action="delete-chart" data-id="${esc(item.id)}">×</button></div>`).join('') : `<span class="field-note">${esc(tr('history.noSavedCharts'))}</span>`}</div>
  </div>`;
}

function renderCustomHistory() {
  renderCustomBuilder();
  const host = $('#historyCharts');
  host.innerHTML = historyChartMarkup('customHistoryChart', tr('history.customChart'), tr('history.customChartHint'));
  const series = app.customChartSeries.map((key, index) => customSeriesDefinition(key, index)).filter(Boolean);
  const rows = [...app.historyData.devices, ...app.historyData.zones, ...app.historyData.sensors];
  drawLineChart($('#customHistoryChart'), series, rows, { height: 390 }); renderLegend($('#customHistoryChartLegend'), series);
}

function renderHistoryPage() {
  renderHistorySummary();
  renderCustomBuilder();
  if (app.historyTab === 'overview') renderOverviewHistory();
  else if (app.historyTab === 'zones') renderZoneHistory();
  else if (app.historyTab === 'devices') renderDeviceHistory();
  else if (app.historyTab === 'energy') renderEnergyHistory();
  else if (app.historyTab === 'network') renderNetworkHistory();
  else if (app.historyTab === 'sensors') renderSensorHistory();
  else renderCustomHistory();
}

function drawCurrentChartIfVisible() {
  if (app.currentView === 'history') renderHistoryPage();
}

async function handleHistoryAction(button) {
  const action = button.dataset.historyAction;
  if (action === 'add-series') {
    const value = $('#customSeriesSelect')?.value;
    if (value && !app.customChartSeries.includes(value)) app.customChartSeries.push(value);
    renderCustomHistory(); updateBrowserUrl(currentHistoryPath(), true); return;
  }
  if (action === 'remove-series') {
    app.customChartSeries.splice(Number(button.dataset.index), 1);
    renderCustomHistory(); updateBrowserUrl(currentHistoryPath(), true); return;
  }
  if (action === 'save-chart') {
    if (!app.customChartSeries.length) return toast(tr('history.noCustomSeries'), true);
    const name = $('#customChartName')?.value.trim() || tr('history.customChart');
    const item = { id: `chart-${Date.now()}`, name, series: [...app.customChartSeries], hours: $('#historyHours')?.value || '24' };
    app.savedCharts.unshift(item); persistSavedCharts(); renderCustomHistory(); toast(tr('history.chartSaved')); return;
  }
  if (action === 'load-chart') {
    const item = app.savedCharts.find(entry => entry.id === button.dataset.id); if (!item) return;
    app.customChartSeries = [...item.series]; if ($('#historyHours') && item.hours) $('#historyHours').value = String(item.hours);
    renderCustomHistory(); updateBrowserUrl(currentHistoryPath()); return;
  }
  if (action === 'delete-chart') {
    app.savedCharts = app.savedCharts.filter(entry => entry.id !== button.dataset.id); persistSavedCharts(); renderCustomHistory(); return;
  }
  if (action === 'copy-chart-link') {
    if (!app.customChartSeries.length) return toast(tr('history.noCustomSeries'), true);
    const path = currentHistoryPath(); updateBrowserUrl(path, true); const link = `${location.origin}${APP_BASE}${path}`;
    try { await navigator.clipboard.writeText(link); } catch (_) { const area = document.createElement('textarea'); area.value = link; document.body.appendChild(area); area.select(); document.execCommand('copy'); area.remove(); }
    toast(tr('history.linkCopied')); return;
  }
}


async function loadEnergyHistory() {
  const targets = normalizeEnergyHistoryTargets();
  if (!targets.length || !app.historyEnergyTargets.length) {
    app.historyEnergy = [];
    return;
  }
  const hours = Number($('#historyHours')?.value || 24);
  const days = Math.max(1, Math.ceil(hours / 24));
  const selected = app.historyEnergyTargets.slice(0, 8);
  app.historyEnergy = await Promise.all(selected.map(targetId => api(`/api/history/energy?target_id=${encodeURIComponent(targetId)}&interval=${encodeURIComponent(app.historyEnergyInterval)}&days=${days}&limit=100000&compare=${encodeURIComponent(app.historyEnergyCompare)}`)));
}

function renderEnergyHistorySummary() {
  const host = $('#historySummary'); if (!host) return;
  const data = (app.historyEnergy || []).filter(item => item && item.source !== 'none');
  if (!data.length) { host.innerHTML = ''; return; }
  if (data.length === 1) {
    const item = data[0];
    const summary = item.summary || {};
    const rows = [
      [tr('energy.today'), summary.today],
      [tr('energy.yesterday'), summary.yesterday],
      [tr('energy.currentMonth'), summary.current_month],
      [tr('energy.previousMonth'), summary.previous_month],
      [tr('energy.periodTotal'), summary.period_total],
    ];
    if (item.comparison) rows.push([tr('energy.comparisonPeriod'), item.comparison.period_total]);
    host.innerHTML = rows.map(([label, value]) => `<div class="history-stat"><small>${esc(label)}</small><strong>${Number(value || 0).toLocaleString(locale(), { maximumFractionDigits: 3 })} kWh</strong><span>${esc(item.target_name || '')} · ${esc(item.source === 'gree_cloud' ? 'GREE Cloud' : 'Home Assistant')}</span></div>`).join('');
    return;
  }
  host.innerHTML = data.map(item => `<div class="history-stat"><small>${esc(item.target_name || item.target_id)}</small><strong>${Number(item.summary?.period_total || 0).toLocaleString(locale(), { maximumFractionDigits: 3 })} kWh</strong><span>${esc(item.source === 'gree_cloud' ? 'GREE Cloud' : 'Home Assistant')}${item.comparison ? ` · ${esc(tr('energy.comparisonPeriod'))}: ${Number(item.comparison.period_total || 0).toLocaleString(locale(), { maximumFractionDigits: 3 })} kWh` : ''}</span></div>`).join('');
}

function renderEnergyHistory() {
  const host = $('#historyCharts'); if (!host) return;
  const data = (app.historyEnergy || []).filter(item => item && item.source !== 'none');
  renderEnergyHistorySummary();
  if (!data.length) {
    host.innerHTML = `<div class="empty"><strong>${esc(tr('energy.noData'))}</strong></div>`;
    return;
  }
  const series = [];
  data.forEach((item, index) => {
    const color = historySeriesColor(index);
    series.push({
      key: `${item.target_id}:current`,
      label: data.length === 1 ? `${item.target_name} · ${tr('energy.currentPeriod')}` : item.target_name,
      color,
      buckets: item.buckets || [],
    });
    if (app.historyEnergyCompare !== 'none' && item.comparison?.buckets?.length) {
      series.push({
        key: `${item.target_id}:comparison`,
        label: `${item.target_name} · ${tr('energy.comparisonPeriod')}`,
        color,
        comparison: true,
        buckets: item.comparison.buckets,
      });
    }
  });
  host.innerHTML = historyChartMarkup('energyConsumptionChart', tr('energy.title'), tr('energy.chartHint'));
  drawEnergyBarChart($('#energyConsumptionChart'), series, { height: 360, interval: app.historyEnergyInterval });
}