Fix distorted sparkline labels: render as HTML overlay instead of SVG text

package.json

@@ -1,6 +1,6 @@
 {
   "name": "site-gateway",
-  "version": "0.11.59",
+  "version": "0.11.63",
   "private": true,
   "description": "Site Gateway: simple self-hosted website publishing, reverse proxying, and automatic HTTPS.",
   "type": "module",

src/public/app.js

@@ -167,6 +167,7 @@ function renderDashboard() {
   $("#system-public-ip").textContent = data.system.publicIp || (data.system.publicIpError ? "Unavailable" : "Checking…");
   $("#system-public-ip-detail").textContent = data.system.publicIpError ? `Check failed · ${data.system.publicIpError}` : data.system.publicIpCheckedAt ? `Checked ${formatTime(data.system.publicIpCheckedAt)}` : "Not yet checked";
   $("#attention-panel").classList.toggle("is-clear", data.attention.length === 0);
+  $("#dashboard-lower-columns").classList.toggle("attention-clear", data.attention.length === 0);
   $("#attention-list").innerHTML = data.attention.length ? data.attention.map(item => `<${item.target ? "button" : "div"} class="attention-tile ${item.target ? "issue-link" : ""}" ${item.target ? `data-issue-target="${escapeHtml(item.target)}"` : ""}><span class="status-dot error"></span><span class="attention-copy"><strong>${escapeHtml(item.name)}</strong><small>${escapeHtml(item.message)}</small></span></${item.target ? "button" : "div"}>`).join("") : '<div class="all-clear"><span class="status-dot running"></span><span>Everything looks good — no issues to review.</span></div>';
   $("#activity-list").innerHTML = data.activity.length ? data.activity.slice(0, 5).map(item => `<div class="activity-tile"><span class="activity-mark ${item.status === "error" ? "bad" : item.status === "warning" ? "warn" : ""}">${item.status === "error" || item.status === "warning" ? "!" : "✓"}</span><span class="activity-copy"><strong>${escapeHtml(item.message)}</strong><small title="${escapeHtml(formatTime(item.at))}">${escapeHtml(formatRelativeTime(item.at))}</small></span></div>`).join("") : '<p class="quiet-state">No recent activity.</p>';
 }
@@ -244,11 +245,42 @@ function renderPerformance() {
   $("#performance-trend-title").textContent = `Requests · last 6 hours${selected ? ` · ${selected}` : ""}`;
   const points = data.trend || [];
   const max = Math.max(1, ...points.map(point => point.count));
-  const stepX = points.length > 1 ? 600 / (points.length - 1) : 600;
+  const left = 34, right = 8, top = 10, bottom = 20, width = 600, height = 140;
-  const path = points.map((point, index) => `${index === 0 ? "M" : "L"}${(index * stepX).toFixed(1)},${(120 - (point.count / max) * 110 - 4).toFixed(1)}`).join(" ");
+  const plotWidth = width - left - right, plotHeight = height - top - bottom;
-  $("#performance-sparkline").innerHTML = points.length ? `<polyline points="${points.map((point, index) => `${(index * stepX).toFixed(1)},${(120 - (point.count / max) * 110 - 4).toFixed(1)}`).join(" ")}" fill="none" stroke="var(--green)" stroke-width="2" /><path d="${path} L${(600).toFixed(1)},120 L0,120 Z" fill="var(--green)" opacity="0.12" stroke="none" />` : "";
+  const xAt = index => left + (points.length > 1 ? (index / (points.length - 1)) * plotWidth : plotWidth);
+  const yAt = count => top + plotHeight - (count / max) * plotHeight;
+  const gridFractions = [0, 0.5, 1];
+  const gridLines = gridFractions.map(fraction => {
+    const y = (top + plotHeight * (1 - fraction)).toFixed(1);
+    return `<line x1="${left}" y1="${y}" x2="${width - right}" y2="${y}" stroke="var(--line)" stroke-width="1" />`;
+  }).join("");
+  const leftPct = (left / width) * 100, topPct = 0, plotHeightPct = (plotHeight / height) * 100, topInsetPct = (top / height) * 100;
+  const axisLabels = gridFractions.map(fraction => {
+    const value = Math.round(max * fraction);
+    const yPct = topInsetPct + plotHeightPct * (1 - fraction);
+    return `<span class="axis-label" style="left:0;width:${(leftPct - 2).toFixed(2)}%;top:${yPct.toFixed(2)}%;text-align:right">${value}</span>`;
+  }).join("");
+  const firstPoint = points[0], lastPoint = points[points.length - 1];
+  const timeLabels = points.length ? `<span class="time-label" style="left:${leftPct.toFixed(2)}%">${escapeHtml(formatTime(firstPoint.at))}</span><span class="time-label time-label-end" style="left:${(100 - (right / width) * 100).toFixed(2)}%">${escapeHtml(formatTime(lastPoint.at))}</span>` : "";
+  $("#performance-sparkline-labels").innerHTML = points.length ? `${axisLabels}${timeLabels}` : "";
+  const coords = points.map((point, index) => [xAt(index), yAt(point.count)]);
+  const smoothLine = coords.length < 2 ? "" : coords.reduce((d, point, index) => {
+    if (index === 0) return `M${point[0].toFixed(1)},${point[1].toFixed(1)}`;
+    const p0 = coords[index - 2 >= 0 ? index - 2 : index - 1];
+    const p1 = coords[index - 1];
+    const p2 = point;
+    const p3 = coords[index + 1] || point;
+    const cp1x = p1[0] + (p2[0] - p0[0]) / 6, cp1y = p1[1] + (p2[1] - p0[1]) / 6;
+    const cp2x = p2[0] - (p3[0] - p1[0]) / 6, cp2y = p2[1] - (p3[1] - p1[1]) / 6;
+    return `${d} C${cp1x.toFixed(1)},${cp1y.toFixed(1)} ${cp2x.toFixed(1)},${cp2y.toFixed(1)} ${p2[0].toFixed(1)},${p2[1].toFixed(1)}`;
+  }, "");
+  const baseline = (top + plotHeight).toFixed(1);
+  const areaPath = coords.length ? `${smoothLine} L${coords[coords.length - 1][0].toFixed(1)},${baseline} L${coords[0][0].toFixed(1)},${baseline} Z` : "";
+  $("#performance-sparkline").setAttribute("viewBox", `0 0 ${width} ${height}`);
+  $("#performance-sparkline").innerHTML = points.length ? `${gridLines}<path d="${areaPath}" fill="var(--green)" opacity="0.12" stroke="none" /><path d="${smoothLine}" fill="none" stroke="var(--green)" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" />` : "";
+  if (!points.length) $("#performance-sparkline-labels").innerHTML = '<span class="axis-label" style="left:0;width:100%;top:45%;text-align:center">No request data for this window yet.</span>';
   const routes = data.routes || [];
-  $("#performance-rows").innerHTML = routes.length ? routes.map(route => `<tr class="${selected && route.host === selected ? "row-highlight" : ""}"><td>${escapeHtml(route.host)}</td><td>${route.hourRequests}</td><td>${route.dayRequests}</td><td>${route.dayErrors ? `<span class="http-status bad">${route.dayErrors}</span>` : "0"}</td><td>${route.dayAvgMs == null ? "—" : `${route.dayAvgMs} ms`}</td></tr>`).join("") : '<tr><td colspan="5" class="quiet-state">No requests have been logged yet.</td></tr>';
+  $("#performance-rows").innerHTML = routes.length ? routes.map(route => `<tr class="${selected && route.host === selected ? "row-highlight" : ""}"><td title="${escapeHtml(route.host)}">${escapeHtml(route.host)}</td><td>${route.hourRequests}</td><td>${route.dayRequests}</td><td>${route.dayErrors ? `<span class="http-status bad">${route.dayErrors}</span>` : "0"}</td><td>${route.dayAvgMs == null ? "—" : `${route.dayAvgMs} ms`}</td></tr>`).join("") : '<tr><td colspan="5" class="quiet-state">No requests have been logged yet.</td></tr>';
   if (selected) $(`#performance-rows tr.row-highlight`)?.scrollIntoView({ block: "nearest" });
 }
 

src/public/index.html

@@ -114,7 +114,7 @@
           </section>
         </div>
         <div id="dashboard-jobs-slot" class="dashboard-jobs-slot"></div>
-        <div class="dashboard-columns lower">
+        <div class="dashboard-columns lower" id="dashboard-lower-columns">
           <section class="dashboard-panel attention-panel" id="attention-panel">
             <div class="panel-heading"><div><p class="eyebrow">Action required</p><h2>Needs attention</h2></div></div>
             <div id="attention-list" class="dashboard-list"><div class="all-clear"><span class="status-dot running"></span><span>Everything looks good — no issues to review.</span></div></div>
@@ -145,10 +145,16 @@
         <p id="performance-summary" class="muted feature-note">No requests recorded yet. <span id="performance-last-checked">Not checked yet.</span></p>
         <section class="dashboard-panel">
           <div class="panel-heading"><div><p class="eyebrow">Trend</p><h2 id="performance-trend-title">Requests · last 6 hours</h2></div></div>
-          <svg id="performance-sparkline" class="performance-sparkline" viewBox="0 0 600 120" preserveAspectRatio="none" aria-label="Request volume trend"></svg>
+          <div class="performance-sparkline-wrap">
+            <svg id="performance-sparkline" class="performance-sparkline" viewBox="0 0 600 140" preserveAspectRatio="none" aria-label="Request volume trend"></svg>
+            <div id="performance-sparkline-labels" class="performance-sparkline-labels"></div>
+          </div>
+        </section>
+        <section class="dashboard-panel">
+          <div class="panel-heading"><div><p class="eyebrow">Per-route</p><h2>Throughput by domain</h2></div></div>
+          <p class="muted feature-note">Requests, error rate, and average response time for each configured domain.</p>
+          <div class="table-wrap performance-table-wrap"><table class="performance-table"><thead><tr><th>Domain</th><th>Last hour</th><th>Last 24h</th><th>Errors (24h)</th><th>Avg. response</th></tr></thead><tbody id="performance-rows"></tbody></table></div>
         </section>
-        <div class="diagnostic-section-heading"><p class="eyebrow">Per-route</p><h2>Throughput by domain</h2><p class="muted">Requests, error rate, and average response time for each configured domain.</p></div>
-        <div class="table-wrap diagnostic-list"><table class="log-table performance-table"><thead><tr><th>Domain</th><th>Last hour</th><th>Last 24h</th><th>Errors (24h)</th><th>Avg. response</th></tr></thead><tbody id="performance-rows"></tbody></table></div>
       </section>
       <section id="users-view" class="feature-view hidden">
         <div class="admin-tabs"><button class="tab-active" data-admin-tab="users">Users</button><button data-admin-tab="defaults">Gateway defaults</button><button data-admin-tab="backups">Backup & restore</button><button data-admin-tab="security">Security & updates</button><button data-admin-tab="danger" class="danger-tab">Danger Zone</button></div>