init: projet complet copymail pour Raspberry Pi

Stack: Nginx + PHP 8.2 + MariaDB + Postfix + Dovecot + Samba
- install.sh: script installation automatisé pour RPi OS Bookworm
- Interface web: visionneuse mails + admin (comptes, domaine, dashboard)
- Chaque compte mail génère automatiquement un share Samba
- Processeur cron: extraction pièces jointes via zbateson/mail-mime-parser
- Zéro injection SQL (PDO + prepared statements)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web/mail/download.php

@@ -0,0 +1,33 @@
+<?php
+require_once __DIR__ . '/../includes/db.php';
+require_once __DIR__ . '/../includes/auth.php';
+
+auth_check();
+
+$id = (int)($_GET['id'] ?? 0);
+if (!$id) { http_response_code(400); exit('bad request'); }
+
+$st = db()->prepare('SELECT file_name, path FROM files WHERE id = ?');
+$st->execute([$id]);
+$row = $st->fetch();
+
+if (!$row || !file_exists($row['path'])) {
+    http_response_code(404);
+    exit('Fichier introuvable.');
+}
+
+$ext  = strtolower(pathinfo($row['file_name'], PATHINFO_EXTENSION));
+$mime = match($ext) {
+    'pdf'  => 'application/pdf',
+    'jpg', 'jpeg' => 'image/jpeg',
+    'png'  => 'image/png',
+    'csv'  => 'text/csv',
+    'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+    'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+    default => 'application/octet-stream',
+};
+
+header('Content-Type: ' . $mime);
+header('Content-Disposition: attachment; filename="' . addslashes($row['file_name']) . '"');
+header('Content-Length: ' . filesize($row['path']));
+readfile($row['path']);