email brand hygiene (#11)

implements proper email hygiene, including templates and a language .json

Reviewed-on: #11
Co-authored-by: vickydotbat <vickydotbat@tutamail.com>
Co-committed-by: vickydotbat <vickydotbat@tutamail.com>

scripts/check-emails.js

@@ -0,0 +1,34 @@
+#!/usr/bin/env node
+// ponytail: 30-line structural guard, not a render test. Catches drift, not pixels.
+const fs = require('fs');
+const path = require('path');
+
+const dir = path.join(__dirname, '..', 'email');
+const files = fs.readdirSync(dir).filter((f) => f.endsWith('.html'));
+
+const failures = [];
+for (const f of files) {
+  const src = fs.readFileSync(path.join(dir, f), 'utf8');
+  const trimmed = src.trim();
+  const checks = [
+    [
+      trimmed.startsWith('<!-- IMPORT emails/partials/header.html -->'),
+      'header IMPORT must be first',
+    ],
+    [
+      trimmed.endsWith('<!-- IMPORT emails/partials/footer.html -->'),
+      'footer IMPORT must be last',
+    ],
+    [/<!-- preheader -->/, 'missing preheader marker'],
+  ];
+  for (const [check, msg] of checks) {
+    if (check instanceof RegExp ? !check.test(src) : !check) failures.push(`${f}: ${msg}`);
+  }
+}
+
+if (failures.length) {
+  console.error('Email template check FAILED:\n' + failures.join('\n'));
+  process.exit(1);
+}
+
+console.log(`Email template check passed (${files.length} templates).`);