feat: initial Speedboard implementation

sitespeed.io web UI with Express/Pug/SQLite — port 3132.
Includes job queue, SSE live log, full metrics dashboard,
site history, CO2/axe/CWV sections, and Docker support.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

routes/status.js

@@ -0,0 +1,74 @@
+import { Router } from 'express';
+import { getJob } from '../db.js';
+import { subscribe } from '../queue.js';
+
+const router = Router();
+
+// Status page (HTML)
+router.get('/:id', (req, res) => {
+  const job = getJob(req.params.id);
+  if (!job) return res.status(404).render('error', { title: '404', message: 'Job not found.' });
+
+  // Already done — redirect immediately
+  if (job.status === 'done') return res.redirect(`/results/${job.id}`);
+  if (job.status === 'error') {
+    return res.render('running', { title: 'Test Failed', job, error: job.error_msg });
+  }
+
+  res.render('running', { title: `Testing ${job.url}`, job });
+});
+
+// SSE stream
+router.get('/:id/stream', (req, res) => {
+  const job = getJob(req.params.id);
+  if (!job) {
+    res.status(404).end();
+    return;
+  }
+
+  // If already done, immediately emit done event
+  if (job.status === 'done') {
+    res.set({
+      'Content-Type': 'text/event-stream',
+      'Cache-Control': 'no-cache',
+      Connection: 'keep-alive',
+    });
+    res.write(`event: done\ndata: ${JSON.stringify({ jobId: job.id })}\n\n`);
+    res.end();
+    return;
+  }
+
+  if (job.status === 'error') {
+    res.set({
+      'Content-Type': 'text/event-stream',
+      'Cache-Control': 'no-cache',
+      Connection: 'keep-alive',
+    });
+    res.write(`event: error\ndata: ${JSON.stringify({ message: job.error_msg })}\n\n`);
+    res.end();
+    return;
+  }
+
+  res.set({
+    'Content-Type': 'text/event-stream',
+    'Cache-Control': 'no-cache',
+    Connection: 'keep-alive',
+    'X-Accel-Buffering': 'no',
+  });
+
+  // Keep-alive ping every 15s
+  const ping = setInterval(() => {
+    res.write(': ping\n\n');
+  }, 15000);
+
+  const unsubscribe = subscribe(job.id, (payload) => {
+    res.write(payload);
+  });
+
+  req.on('close', () => {
+    clearInterval(ping);
+    unsubscribe();
+  });
+});
+
+export default router;