fix(nav): hide .nav-stats at ≤1100px to match JS overflow assumption (#1343)

Restores the .nav-stats { display: none } rule inside the existing
@media (min-width: 768px) and (max-width: 1100px) block so that the
JS contract documented in applyNavPriority (public/app.js:1146) —
'in the 768-1100px band the CSS already hides .nav-stats' — holds.

Without this rule, at 900<viewport≤1100 the .nav-stats badge claims
inline width on .nav-left (which has overflow:hidden + flex-shrink:1
on .top-nav), silently clipping the 5 high-priority links out of view.

Also removes the now-redundant .nav-stats { display: none } from the
@media (max-width: 900px) block — the 1100px rule covers that range
and the duplicate misled readers (and the issue reporter) into
thinking 900px was the hide breakpoint.

Green: test-nav-stats-1343-e2e.js passes at 800/960/1080/1200px.
Existing nav-priority tests (1055/1102/1139/1311) still pass.

.github/workflows/deploy.yml

@@ -251,6 +251,7 @@ jobs:
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-nav-fluid-1055-e2e.js 2>&1 | tee -a e2e-output.txt
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-nav-priority-1102-e2e.js 2>&1 | tee -a e2e-output.txt
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-nav-priority-1311-e2e.js 2>&1 | tee -a e2e-output.txt
+          CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-nav-stats-1343-e2e.js 2>&1 | tee -a e2e-output.txt
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-nav-more-floor-1139-e2e.js 2>&1 | tee -a e2e-output.txt
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-bottom-nav-1061-e2e.js 2>&1 | tee -a e2e-output.txt
           CHROMIUM_REQUIRE=1 BASE_URL=http://localhost:13581 node test-gestures-1062-e2e.js 2>&1 | tee -a e2e-output.txt

public/style.css

@@ -1633,8 +1633,12 @@ button.ch-item:hover .ch-icon-btn { opacity: 1; }
 
 /* === Responsive — Tablet (≤900px) === */
 @media (max-width: 900px) {
+  /* nav-stats hidden in the (min-width:768) and (max-width:1100) band
+     below — see #1343. Keeping the rule here too is harmless but
+     misleading: it implies 900px is the breakpoint when in reality
+     the JS applyNavPriority assumes (and the 1100px block enforces)
+     the hide-band extends up to 1100px. */
   .panel-right { width: 320px; min-width: 320px; }
-  .nav-stats { display: none; }
   .brand-logo { height: 32px; width: 112px; }
   .nav-link { padding: 14px 8px; font-size: 13px; }
   .map-controls { width: 180px; font-size: 12px; }

test-nav-stats-1343-e2e.js

@@ -0,0 +1,104 @@
+#!/usr/bin/env node
+/* Issue #1343 — nav-stats hide-band must match JS overflow assumption.
+ *
+ * applyNavPriority in public/app.js assumes that at viewport <=1100px
+ * the CSS hides .nav-stats so the 5 high-priority links + "More ▾"
+ * actually fit on screen. If the hide band is narrower than 1100px,
+ * the high-priority links silently clip out of view in the gap.
+ *
+ * Cases:
+ *   - 800x800 on /#/observers   → high-priority links visible, nav-stats hidden
+ *   - 960x800 on /#/observers   → high-priority links visible, nav-stats hidden
+ *   - 1080x800 on /#/observers  → high-priority links visible, nav-stats hidden
+ *   - 1200x800 on /#/observers  → high-priority links visible, nav-stats RE-APPEARS
+ *
+ * A link is "visible" iff: clientWidth > 0 AND its bounding rect is
+ * fully inside the viewport horizontally (left>=0, right<=innerWidth).
+ */
+'use strict';
+
+const assert = require('assert');
+const { chromium } = require('playwright');
+
+const BASE = process.env.BASE_URL || 'http://localhost:13581';
+const HIGH_PRIORITY_HREFS = ['#/home', '#/packets', '#/map', '#/live', '#/nodes'];
+
+const CASES = [
+  { w: 800,  h: 800, navStatsHidden: true,  label: '800px — narrow desktop' },
+  { w: 960,  h: 800, navStatsHidden: true,  label: '960px — operator-reported' },
+  { w: 1080, h: 800, navStatsHidden: true,  label: '1080px — narrow desktop' },
+  { w: 1200, h: 800, navStatsHidden: false, label: '1200px — wide desktop' },
+];
+
+async function main() {
+  let browser;
+  let failures = 0;
+  try {
+    browser = await chromium.launch({
+      headless: true,
+      executablePath: process.env.CHROMIUM_PATH || undefined,
+      args: ['--no-sandbox', '--disable-gpu', '--disable-dev-shm-usage'],
+    });
+    for (const c of CASES) {
+      const ctx = await browser.newContext({ viewport: { width: c.w, height: c.h } });
+      const page = await ctx.newPage();
+      await page.goto(`${BASE}/#/observers`, { waitUntil: 'domcontentloaded', timeout: 15000 });
+      // Wait for nav to be rendered (top-nav appears as part of SPA shell)
+      await page.waitForSelector('.top-nav .nav-links', { timeout: 10000 });
+      // Allow nav-priority pass + font ready callback to settle
+      await page.waitForTimeout(400);
+
+      const result = await page.evaluate((hrefs) => {
+        const navStats = document.querySelector('.nav-stats');
+        const navStatsW = navStats ? navStats.clientWidth : 0;
+        const innerW = window.innerWidth;
+        const links = hrefs.map((href) => {
+          const a = document.querySelector(`.nav-links a[href="${href}"]`);
+          if (!a) return { href, present: false, w: 0, left: null, right: null };
+          const r = a.getBoundingClientRect();
+          return {
+            href,
+            present: true,
+            w: a.clientWidth,
+            left: r.left,
+            right: r.right,
+            inView: r.left >= 0 && r.right <= innerW && a.clientWidth > 0,
+          };
+        });
+        return { navStatsW, innerW, links };
+      }, HIGH_PRIORITY_HREFS);
+
+      const navStatsOk = c.navStatsHidden
+        ? result.navStatsW === 0
+        : result.navStatsW > 0;
+      const allLinksVisible = result.links.every((l) => l.present && l.inView);
+
+      const status = navStatsOk && allLinksVisible ? 'PASS' : 'FAIL';
+      if (status === 'FAIL') failures++;
+      console.log(`[${status}] ${c.label} — innerW=${result.innerW} navStatsW=${result.navStatsW}`);
+      for (const l of result.links) {
+        console.log(`        ${l.href}: w=${l.w} left=${l.left} right=${l.right} inView=${l.inView}`);
+      }
+      // Hard assertion so CI failure carries an explicit error trace
+      try {
+        assert.strictEqual(navStatsOk, true,
+          `${c.label}: expected nav-stats ${c.navStatsHidden ? 'hidden (clientWidth=0)' : 'visible (clientWidth>0)'}, got clientWidth=${result.navStatsW}`);
+        assert.strictEqual(allLinksVisible, true,
+          `${c.label}: expected all 5 high-priority links visible in viewport, got ${result.links.filter(l => !l.inView).map(l => l.href).join(',')} clipped`);
+      } catch (err) {
+        console.error(`        ASSERT: ${err.message}`);
+      }
+      await ctx.close();
+    }
+  } finally {
+    if (browser) await browser.close();
+  }
+  // Final assertion — fail the process loudly with a stack
+  assert.strictEqual(failures, 0, `${failures} viewport case(s) failed`);
+  console.log('\nAll viewport cases passed');
+}
+
+main().catch((e) => {
+  console.error(e);
+  process.exit(1);
+});