📂 Directory Structure

pulsehub/
│
├── index.php                   Front controller
├── .htaccess                   Apache URL rewriting + security
├── nginx.conf.example          Nginx reference config
├── cron.php                    CLI/URL cron runner
│
├── install/
│   ├── index.php               Two-step browser installer
│   └── upgrade.php             Web-based database upgrade tool
│
├── config/                     Created by installer
│   ├── database.php            DB credentials
│   └── app.php                 App key, OpenAI key
│
├── app/
│   ├── router.php              URL dispatch table
│   ├── Controllers/            Business logic (11 controllers)
│   ├── Views/                  PHP templates
│   ├── Helpers/                DB, auth, functions, session
│   └── Migrations/
│       └── schema.sql          Full DDL
│
├── public/
│   ├── css/app.css             All styles
│   └── js/                     Frontend modules (10 files)
│
└── data/                       Writable uploads directory