feat: routes /map /nav — Leaflet GPS/USBL + Chart.js depth viewer

viz/static/js/nav_charts.js

@@ -0,0 +1,60 @@
+let chartXY = null, chartZ = null;
+
+function initCharts() {
+  const base = {
+    responsive: true, maintainAspectRatio: false,
+    plugins: { legend: { labels: { color: '#888' } }, title: { display: true, color: '#ccc' } },
+    scales: {
+      x: { ticks: { color: '#666' }, grid: { color: '#1a2a1a' } },
+      y: { ticks: { color: '#666' }, grid: { color: '#1a2a1a' } }
+    }
+  };
+  chartXY = new Chart(document.getElementById('chart-xy'), {
+    type: 'scatter',
+    data: { datasets: [{ label: 'Track XY (m)', data: [], borderColor: '#4ade80',
+                         backgroundColor: 'rgba(74,222,128,0.3)', pointRadius: 1 }] },
+    options: { ...base, plugins: { ...base.plugins,
+      title: { display: true, text: 'Track XY lingbot (m, local)', color: '#ccc' } } }
+  });
+  chartZ = new Chart(document.getElementById('chart-z'), {
+    type: 'line',
+    data: { datasets: [{ label: 'Z camera (m)', data: [], borderColor: '#60a5fa',
+                         backgroundColor: 'transparent', pointRadius: 0, borderWidth: 1.5 }] },
+    options: { ...base,
+      plugins: { ...base.plugins,
+        title: { display: true, text: 'Z camera / profondeur approx (m)', color: '#ccc' } },
+      scales: { ...base.scales, y: { ...base.scales.y, reverse: true } } }
+  });
+}
+
+async function loadJobs() {
+  const res = await fetch('/nav/api/jobs');
+  const jobs = await res.json();
+  const sel = document.getElementById('job-select');
+  jobs.forEach(j => {
+    const opt = document.createElement('option');
+    opt.value = j.id;
+    opt.textContent = 'job_' + j.id;
+    sel.appendChild(opt);
+  });
+  const urlJob = new URLSearchParams(window.location.search).get('job');
+  const target = urlJob ? parseInt(urlJob) : (jobs.length > 0 ? jobs[0].id : null);
+  if (target) { sel.value = target; loadJob(target); }
+}
+
+async function loadJob(jobId) {
+  const res = await fetch('/nav/api/job/' + jobId + '/nav');
+  const d = await res.json();
+  if (!d.track) return;
+  chartXY.data.datasets[0].data = d.track.x.map((x,i) => ({ x, y: d.track.y[i] }));
+  chartXY.update();
+  chartZ.data.datasets[0].data = d.track.z.map((z,i) => ({ x: i, y: z }));
+  chartZ.update();
+}
+
+document.getElementById('job-select').addEventListener('change', e => {
+  if (e.target.value) loadJob(parseInt(e.target.value));
+});
+
+initCharts();
+loadJobs();