feat: announce each release once with a toast generated from the changelog

scripts/generate-whats-new.mjs

@@ -0,0 +1,18 @@
+#!/usr/bin/env node
+// Writes src/web/public/whats-new.json for the version in package.json from CHANGELOG.md.
+// Runs as part of `npm run version-packages`, so every release carries its own notes and the
+// UI can announce them once per version without anyone remembering to.
+import { readFileSync, writeFileSync } from 'node:fs';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { buildWhatsNew } from './lib/whats-new.mjs';
+
+const root = resolve(dirname(fileURLToPath(import.meta.url)), '..');
+const { version } = JSON.parse(readFileSync(resolve(root, 'package.json'), 'utf8'));
+const changelog = readFileSync(resolve(root, 'CHANGELOG.md'), 'utf8');
+const notes = buildWhatsNew(changelog, version);
+if (notes.highlights.length === 0) {
+  console.warn(`whats-new: no bold highlights found for ${version}; the in-app announcement will be skipped`);
+}
+writeFileSync(resolve(root, 'src/web/public/whats-new.json'), JSON.stringify(notes, null, 2) + '\n');
+console.log(`whats-new: ${version} -> ${notes.highlights.length} highlight(s)`);

scripts/lib/whats-new.mjs

@@ -0,0 +1,35 @@
+/**
+ * Pulls the headline of each change out of one version's section of CHANGELOG.md.
+ *
+ * Release notes here lead each change with a bold phrase ("**Tab layouts (#538, optional).** ..."),
+ * so a highlight is that phrase. The Thanks block is credit, not a feature.
+ */
+
+const MAX_HIGHLIGHTS = 8;
+
+/** The text between `## <version>` and the next `## ` heading, or '' when absent. */
+export function versionSection(changelog, version) {
+  const lines = changelog.split(/\r?\n/);
+  const start = lines.findIndex((l) => l.trim() === `## ${version}`);
+  if (start === -1) return '';
+  let end = lines.findIndex((l, i) => i > start && /^## /.test(l));
+  if (end === -1) end = lines.length;
+  return lines.slice(start + 1, end).join('\n');
+}
+
+/** Bold lead-ins at the start of a paragraph or bullet, cleaned for display. */
+export function extractHighlights(section) {
+  const out = [];
+  for (const line of section.split('\n')) {
+    const m = /^\s*(?:[-*]\s+)?\*\*([^*]{3,120})\*\*/.exec(line);
+    if (!m) continue;
+    const text = m[1].replace(/[\s.:]+$/, '').trim();
+    if (!text || /^thanks\b/i.test(text)) continue;
+    if (!out.includes(text)) out.push(text);
+  }
+  return out.slice(0, MAX_HIGHLIGHTS);
+}
+
+export function buildWhatsNew(changelog, version) {
+  return { version, highlights: extractHighlights(versionSection(changelog, version)) };
+}