diff --git a/public/style.css b/public/style.css
index f34004ab..2ea4a62f 100644
--- a/public/style.css
+++ b/public/style.css
@@ -1959,9 +1959,28 @@ tr[data-hops]:hover { background: rgba(59,130,246,0.1); }
.analytics-stat-label { font-size: 10px; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); margin-bottom: 2px; }
.analytics-stat-value { font-size: 20px; font-weight: 700; }
.analytics-stat-desc { font-size: 10px; color: var(--text-muted); margin-top: 2px; font-style: italic; }
-.analytics-charts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 16px; }
-.analytics-chart-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 6px; padding: 12px; }
+.analytics-charts {
+ /* #1058 — fluid + auto-stacking layout. The grid sizes from its own
+ available width (NOT the viewport), so a narrow side-pane on a wide
+ screen still stacks. `auto-fit` collapses empty tracks; `minmax()`
+ guarantees a minimum readable column width before wrapping. The
+ `container-type: inline-size` opts in to container queries so
+ descendants (or future tweaks) can size against this element's
+ own width rather than the viewport. Uses #1054 spacing tokens. */
+ container-type: inline-size;
+ display: grid;
+ grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
+ gap: var(--space-sm);
+ margin-bottom: var(--space-md);
+}
+.analytics-chart-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 6px; padding: var(--space-sm); min-width: 0; }
.analytics-chart-card.full { grid-column: 1 / -1; }
+/* Constrain chart media inside the card (svg/canvas at any depth). The
+ `.analytics-chart-card svg, .analytics-chart-card canvas` descendant
+ selector is robust to wrapper elements (legends, tooltips, axis
+ groups) being added between the card and the chart media. */
+.analytics-chart-card svg,
+.analytics-chart-card canvas { max-width: 100%; height: auto; display: block; }
.analytics-chart-card h4 { font-size: 11px; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); margin-bottom: 4px; }
.analytics-chart-desc { font-size: 10px; color: var(--text-muted); margin-bottom: 8px; font-style: italic; }
.analytics-heatmap { display: grid; grid-template-columns: 40px repeat(24, 1fr); gap: 2px; }
@@ -1974,7 +1993,7 @@ tr[data-hops]:hover { background: rgba(59,130,246,0.1); }
.analytics-peer-table th { text-align: left; padding: 6px 8px; border-bottom: 2px solid var(--border); color: var(--text-muted); font-size: 11px; text-transform: uppercase; }
.analytics-peer-table td { padding: 6px 8px; border-bottom: 1px solid var(--border); }
.analytics-peer-table tr:hover td { background: var(--card-bg); }
-@media (max-width: 768px) { .analytics-stats { grid-template-columns: repeat(2, 1fr); } .analytics-charts { grid-template-columns: 1fr; } }
+@media (max-width: 768px) { .analytics-stats { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .analytics-stats { grid-template-columns: 1fr; } }
/* Claimed (My Mesh) node rows */
diff --git a/test-analytics-fluid-charts.js b/test-analytics-fluid-charts.js
new file mode 100644
index 00000000..b160700b
--- /dev/null
+++ b/test-analytics-fluid-charts.js
@@ -0,0 +1,205 @@
+/**
+ * E2E (#1058): Analytics chart containers — fluid + auto-stacking via
+ * container queries.
+ *
+ * Boots Chromium with a minimal HTML harness that links public/style.css
+ * and renders the .analytics-charts grid at 768/1080/1440 viewports.
+ *
+ * Asserts:
+ * - No horizontal overflow of the chart grid (scrollWidth <= clientWidth).
+ * - Cards STACK (single column) when the .analytics-charts container is
+ * narrower than 800px.
+ * - Cards are SIDE-BY-SIDE (≥2 columns) when the container is at least
+ * 1200px wide.
+ * - The .analytics-charts element opts in to container queries via
+ * `container-type: inline-size`.
+ *
+ * Pure file:// harness — does not require the Go server.
+ *
+ * Usage: node test-analytics-fluid-charts.js
+ */
+'use strict';
+const { chromium } = require('playwright');
+const fs = require('fs');
+const path = require('path');
+const os = require('os');
+
+const CSS_PATH = path.join(__dirname, 'public', 'style.css');
+const cssHref = 'file://' + CSS_PATH;
+
+// Minimal harness: a sized wrapper that defines the available width
+// for the .analytics-charts container, plus a handful of chart cards
+// matching the production markup.
+function harnessHTML(wrapperWidth) {
+ const card = (full) =>
+ `
` +
+ `
Card
` +
+ `
Desc
` +
+ `
` +
+ `
`;
+ return `
+
+
+
+
+
+
+ ${card(false)}${card(false)}${card(false)}${card(false)}
+
+
+ `;
+}
+
+let passed = 0, failed = 0;
+async function step(name, fn) {
+ try { await fn(); passed++; console.log(' \u2713 ' + name); }
+ catch (e) { failed++; console.error(' \u2717 ' + name + ': ' + e.message); }
+}
+function assert(c, m) { if (!c) throw new Error(m || 'assertion failed'); }
+
+(async () => {
+ const browser = await chromium.launch({
+ headless: true,
+ executablePath: process.env.CHROMIUM_PATH || '/usr/bin/chromium',
+ args: ['--no-sandbox', '--disable-gpu', '--disable-dev-shm-usage'],
+ });
+ const ctx = await browser.newContext();
+ const page = await ctx.newPage();
+ page.on('pageerror', (e) => console.error('[pageerror]', e.message));
+
+ console.log('\n=== #1058 Analytics fluid charts E2E ===');
+
+ async function load(wrapperWidth, viewportWidth) {
+ await page.setViewportSize({ width: viewportWidth, height: 900 });
+ const tmp = path.join(os.tmpdir(),
+ `1058-harness-${wrapperWidth}-${viewportWidth}.html`);
+ fs.writeFileSync(tmp, harnessHTML(wrapperWidth));
+ await page.goto('file://' + tmp, { waitUntil: 'domcontentloaded' });
+ }
+
+ // Helper: count distinct column-x-positions of chart cards.
+ async function colCount() {
+ return page.evaluate(() => {
+ const cards = Array.from(document.querySelectorAll(
+ '.analytics-charts > .analytics-chart-card'));
+ const xs = new Set(cards.map(c =>
+ Math.round(c.getBoundingClientRect().left)));
+ return xs.size;
+ });
+ }
+ async function overflow() {
+ return page.evaluate(() => {
+ const g = document.getElementById('grid');
+ return { scrollW: g.scrollWidth, clientW: g.clientWidth };
+ });
+ }
+
+ // --- Container-query opt-in -------------------------------------------
+ await step('analytics-charts opts in to container queries', async () => {
+ await load(1200, 1440);
+ const ct = await page.evaluate(() => {
+ const g = document.getElementById('grid');
+ return getComputedStyle(g).containerType;
+ });
+ assert(/inline-size|size/.test(ct),
+ `expected container-type to be inline-size; got "${ct}"`);
+ });
+
+ // --- Viewport 1440: container ≥1200 → side-by-side --------------------
+ await step('viewport 1440 / wrapper 1300px → side-by-side (≥2 cols)', async () => {
+ await load(1300, 1440);
+ const cols = await colCount();
+ assert(cols >= 2, `expected ≥2 columns at wrapper 1300px; got ${cols}`);
+ const o = await overflow();
+ assert(o.scrollW <= o.clientW + 1,
+ `horizontal overflow: scrollW=${o.scrollW} clientW=${o.clientW}`);
+ });
+
+ // --- Viewport 1080: medium width — must not overflow ------------------
+ await step('viewport 1080 / wrapper 1040px → no horizontal overflow', async () => {
+ await load(1040, 1080);
+ const o = await overflow();
+ assert(o.scrollW <= o.clientW + 1,
+ `horizontal overflow: scrollW=${o.scrollW} clientW=${o.clientW}`);
+ });
+
+ // --- Viewport 768: container <800 → must stack vertically -------------
+ await step('viewport 768 / wrapper 760px → cards stack (1 col)', async () => {
+ await load(760, 768);
+ const cols = await colCount();
+ assert(cols === 1, `expected 1 column at wrapper 760px; got ${cols}`);
+ const o = await overflow();
+ assert(o.scrollW <= o.clientW + 1,
+ `horizontal overflow: scrollW=${o.scrollW} clientW=${o.clientW}`);
+ });
+
+ // --- THE bug: wide viewport + narrow container — must stack ----------
+ // Today's @media (max-width:768px) is keyed off viewport, not container.
+ // A narrow wrapper inside a wide viewport (e.g., side pane on a 1440
+ // screen) should still stack the charts via container queries.
+ await step('viewport 1440 / wrapper 600px → cards stack via container query', async () => {
+ await load(600, 1440);
+ const cols = await colCount();
+ assert(cols === 1,
+ `expected 1 column when container <800px regardless of viewport; got ${cols}`);
+ const o = await overflow();
+ assert(o.scrollW <= o.clientW + 1,
+ `horizontal overflow at wide-viewport/narrow-container: scrollW=${o.scrollW} clientW=${o.clientW}`);
+ });
+
+ // --- Viewport 1920: large desktop → side-by-side, no overflow --------
+ await step('viewport 1920 / wrapper 1880px → side-by-side (≥2 cols), no overflow', async () => {
+ await load(1880, 1920);
+ const cols = await colCount();
+ assert(cols >= 2, `expected ≥2 columns at wrapper 1880px; got ${cols}`);
+ const o = await overflow();
+ assert(o.scrollW <= o.clientW + 1,
+ `horizontal overflow at 1920: scrollW=${o.scrollW} clientW=${o.clientW}`);
+ });
+
+ // --- Viewport 2560: ultra-wide → side-by-side, no overflow -----------
+ await step('viewport 2560 / wrapper 2520px → side-by-side (≥2 cols), no overflow', async () => {
+ await load(2520, 2560);
+ const cols = await colCount();
+ assert(cols >= 2, `expected ≥2 columns at wrapper 2520px; got ${cols}`);
+ const o = await overflow();
+ assert(o.scrollW <= o.clientW + 1,
+ `horizontal overflow at 2560: scrollW=${o.scrollW} clientW=${o.clientW}`);
+ });
+
+ // --- AC3: charts must redraw/relayout on viewport resize -------------
+ // Open at 1440 wide (side-by-side), then shrink the wrapper to 760
+ // (sub-800 container) and assert the layout actually flips to a
+ // single column. This guards against any future regression where
+ // the grid is computed once and stuck.
+ await step('AC3: layout reflows on resize (1440 side-by-side → 768 stacked)', async () => {
+ await load(1300, 1440);
+ const colsWide = await colCount();
+ assert(colsWide >= 2,
+ `precondition failed: expected ≥2 cols at 1300px; got ${colsWide}`);
+ // Shrink only the wrapper (no full reload) — proves the layout
+ // recomputes from the current container width, not a one-shot value.
+ await page.evaluate(() => {
+ document.getElementById('wrap').style.width = '760px';
+ });
+ await page.setViewportSize({ width: 768, height: 900 });
+ // Give the browser a frame to recompute layout.
+ await page.evaluate(() => new Promise(r => requestAnimationFrame(() => requestAnimationFrame(r))));
+ const colsNarrow = await colCount();
+ assert(colsNarrow === 1,
+ `expected layout to reflow to 1 column after shrink; got ${colsNarrow}`);
+ const o = await overflow();
+ assert(o.scrollW <= o.clientW + 1,
+ `horizontal overflow after resize: scrollW=${o.scrollW} clientW=${o.clientW}`);
+ });
+
+ await browser.close();
+
+ console.log(`\n${passed} passed, ${failed} failed`);
+ process.exit(failed ? 1 : 0);
+})();