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>

db.js

@@ -0,0 +1,185 @@
+import Database from 'better-sqlite3';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const DB_PATH = process.env.DB_PATH || join(__dirname, 'speedboard.db');
+
+let db;
+
+export function getDb() {
+  if (!db) {
+    db = new Database(DB_PATH);
+    db.pragma('journal_mode = WAL');
+    db.pragma('foreign_keys = ON');
+    initSchema();
+  }
+  return db;
+}
+
+function initSchema() {
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS jobs (
+      id TEXT PRIMARY KEY,
+      url TEXT NOT NULL,
+      browser TEXT NOT NULL DEFAULT 'chrome',
+      mobile INTEGER NOT NULL DEFAULT 0,
+      runs INTEGER NOT NULL DEFAULT 3,
+      status TEXT NOT NULL DEFAULT 'queued',
+      created_at TEXT NOT NULL DEFAULT (datetime('now')),
+      started_at TEXT,
+      finished_at TEXT,
+      error_msg TEXT,
+
+      -- Core Web Vitals (ms / score)
+      lcp REAL,
+      cls REAL,
+      tbt REAL,
+      fcp REAL,
+      ttfb REAL,
+      max_potential_fid REAL,
+
+      -- Visual metrics
+      speed_index REAL,
+      first_visual_change REAL,
+      last_visual_change REAL,
+      visual_complete_85 REAL,
+      perceptual_speed_index REAL,
+
+      -- Navigation timings (ms)
+      page_load_time REAL,
+      fully_loaded REAL,
+      dom_content_loaded REAL,
+      dom_interactive REAL,
+      front_end_time REAL,
+      back_end_time REAL,
+      time_to_first_byte REAL,
+
+      -- Coach scores (0-100)
+      score_overall REAL,
+      score_performance REAL,
+      score_accessibility REAL,
+      score_bestpractice REAL,
+      score_privacy REAL,
+
+      -- Resource sizes (bytes)
+      transfer_total REAL,
+      transfer_html REAL,
+      transfer_js REAL,
+      transfer_css REAL,
+      transfer_image REAL,
+      transfer_font REAL,
+      transfer_other REAL,
+
+      -- Request counts
+      requests_total INTEGER,
+      requests_js INTEGER,
+      requests_css INTEGER,
+      requests_image INTEGER,
+      requests_font INTEGER,
+
+      -- Third-party
+      third_party_requests INTEGER,
+      third_party_transfer REAL,
+
+      -- Accessibility (axe)
+      axe_critical INTEGER,
+      axe_serious INTEGER,
+      axe_moderate INTEGER,
+      axe_minor INTEGER,
+
+      -- CPU
+      long_tasks_count INTEGER,
+      long_tasks_duration REAL,
+
+      -- CO2
+      co2_per_page_view REAL,
+      co2_total REAL,
+      co2_first_party REAL,
+      co2_third_party REAL,
+
+      -- Raw JSON paths for drilling down
+      report_folder TEXT
+    );
+
+    CREATE INDEX IF NOT EXISTS idx_jobs_url ON jobs(url);
+    CREATE INDEX IF NOT EXISTS idx_jobs_created ON jobs(created_at DESC);
+    CREATE INDEX IF NOT EXISTS idx_jobs_status ON jobs(status);
+  `);
+}
+
+export function createJob(id, url, browser, mobile, runs) {
+  const stmt = getDb().prepare(`
+    INSERT INTO jobs (id, url, browser, mobile, runs, status, created_at)
+    VALUES (?, ?, ?, ?, ?, 'queued', datetime('now'))
+  `);
+  stmt.run(id, url, browser, mobile ? 1 : 0, runs);
+}
+
+export function updateJobStatus(id, status, extras = {}) {
+  const db = getDb();
+  const fields = ['status = ?'];
+  const values = [status];
+
+  if (status === 'running') {
+    fields.push('started_at = datetime(\'now\')');
+  }
+  if (status === 'done' || status === 'error') {
+    fields.push('finished_at = datetime(\'now\')');
+  }
+  if (extras.error_msg !== undefined) {
+    fields.push('error_msg = ?');
+    values.push(extras.error_msg);
+  }
+  if (extras.report_folder !== undefined) {
+    fields.push('report_folder = ?');
+    values.push(extras.report_folder);
+  }
+
+  values.push(id);
+  db.prepare(`UPDATE jobs SET ${fields.join(', ')} WHERE id = ?`).run(...values);
+}
+
+export function updateJobMetrics(id, metrics) {
+  const db = getDb();
+  const keys = Object.keys(metrics);
+  if (keys.length === 0) return;
+  const sets = keys.map(k => `${k} = ?`).join(', ');
+  const values = keys.map(k => metrics[k]);
+  values.push(id);
+  db.prepare(`UPDATE jobs SET ${sets} WHERE id = ?`).run(...values);
+}
+
+export function getJob(id) {
+  return getDb().prepare('SELECT * FROM jobs WHERE id = ?').get(id);
+}
+
+export function getHistory(limit = 100) {
+  return getDb().prepare(`
+    SELECT id, url, browser, mobile, runs, status, created_at, finished_at,
+           lcp, fcp, tbt, speed_index, score_overall, score_performance,
+           transfer_total, requests_total
+    FROM jobs
+    ORDER BY created_at DESC
+    LIMIT ?
+  `).all(limit);
+}
+
+export function getSiteHistory(url, limit = 20) {
+  return getDb().prepare(`
+    SELECT * FROM jobs
+    WHERE url = ? AND status = 'done'
+    ORDER BY created_at DESC
+    LIMIT ?
+  `).all(url, limit);
+}
+
+export function getDistinctUrls() {
+  return getDb().prepare(`
+    SELECT url, COUNT(*) as count, MAX(created_at) as last_tested,
+           (SELECT status FROM jobs j2 WHERE j2.url = jobs.url ORDER BY created_at DESC LIMIT 1) as last_status
+    FROM jobs
+    GROUP BY url
+    ORDER BY MAX(created_at) DESC
+  `).all();
+}