Initial commit: Mail service with Brevo SMTP

- Express server with REST API for sending emails
- SQLite database for persistent email history
- Web interface with form (recipient, CC, subject, text/HTML)
- Email footer with embedded image (CID attachment)
- Nodemailer configured for Brevo SMTP relay

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package.json

@@ -0,0 +1,19 @@
+{
+  "name": "mail-service",
+  "version": "1.0.0",
+  "description": "Web interface for testing email sending via Brevo SMTP",
+  "main": "src/server.js",
+  "scripts": {
+    "start": "node src/server.js",
+    "dev": "node --watch src/server.js"
+  },
+  "keywords": ["mail", "smtp", "brevo", "nodemailer"],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "better-sqlite3": "^11.0.0",
+    "dotenv": "^16.4.0",
+    "express": "^4.18.0",
+    "nodemailer": "^6.9.0"
+  }
+}