Initial commit: repair cafe kanban board

A per-event queue board for a repair cafe. Customers sign items in on a
shared tablet; volunteers drag repairs through Queue, In progress and Done
on a dashboard, then export the day's records as CSV.

Zero npm dependencies: node:http plus JSON files on disk, no build step.
Categories and house rules are set in config.json. Events are deleted
7 days after creation.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lib/csv.js

@@ -0,0 +1,66 @@
+'use strict';
+
+const COLUMNS = [
+  'event',
+  'date/time added',
+  'customer',
+  'item',
+  'category',
+  'problem',
+  'status',
+  'repairer',
+  'outcome',
+  'tools/consumables',
+  'notes',
+];
+
+// Quote a field if it contains anything that would break the row, doubling any
+// quotes inside it. Everything else goes out bare.
+function escapeField(value) {
+  const text = value === null || value === undefined ? '' : String(value);
+  if (/[",\r\n]/.test(text)) return '"' + text.replace(/"/g, '""') + '"';
+  return text;
+}
+
+function row(fields) {
+  return fields.map(escapeField).join(',');
+}
+
+// "2026-08-15 17:14" in the server's timezone — spreadsheets read that as a
+// date, which a raw UTC ISO string does not.
+function localDateTime(iso) {
+  const d = new Date(iso);
+  if (Number.isNaN(d.getTime())) return iso;
+  const pad = (n) => String(n).padStart(2, '0');
+  return (
+    `${d.getFullYear()}-${pad(d.getMonth() + 1)}-${pad(d.getDate())} ` +
+    `${pad(d.getHours())}:${pad(d.getMinutes())}`
+  );
+}
+
+function repairRows(event) {
+  return event.repairs.map((r) =>
+    row([
+      event.name,
+      localDateTime(r.createdAt),
+      r.customer,
+      r.item,
+      r.category,
+      r.problem,
+      r.status,
+      r.repairer,
+      r.outcome,
+      r.toolsUsed,
+      (r.notes || []).map((n) => n.text).join(' | '),
+    ])
+  );
+}
+
+// A leading BOM so Excel reads it as UTF-8 rather than mangling accents.
+function toCsv(events) {
+  const lines = [row(COLUMNS)];
+  for (const event of events) lines.push(...repairRows(event));
+  return '' + lines.join('\r\n') + '\r\n';
+}
+
+module.exports = { toCsv, escapeField, COLUMNS };