Init photobooth - borne photo evenementielle RPi4

Backend FastAPI complet : camera gphoto2, filtres/overlays Pillow,
chroma key OpenCV, multi-shot/collage, GIF, impression CUPS, email SMTP,
QR code. Frontend web vanilla (HTML/CSS/JS) pour Chromium kiosk.
Menu admin cache (appui long coin ecran). Toutes les fonctionnalites
activables/desactivables. Scripts install + systemd pour RPi4.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/mailer.py

@@ -0,0 +1,64 @@
+import logging
+import smtplib
+from email.mime.base import MIMEBase
+from email.mime.multipart import MIMEMultipart
+from email.mime.text import MIMEText
+from email import encoders
+from pathlib import Path
+
+from backend.config import charger_config
+
+log = logging.getLogger("photobooth.mailer")
+
+
+def envoyer_photo(destinataire: str, chemin_photo: Path) -> bool:
+    """Envoie une photo par email."""
+    config = charger_config()
+    conf_email = config.get("email", {})
+    conf_event = config.get("evenement", {})
+
+    smtp_host = conf_email.get("smtp_host", "")
+    smtp_port = conf_email.get("smtp_port", 587)
+    smtp_user = conf_email.get("smtp_user", "")
+    smtp_password = conf_email.get("smtp_password", "")
+    expediteur = conf_email.get("expediteur", smtp_user)
+
+    if not smtp_host or not smtp_user:
+        log.error("Configuration email incomplete")
+        return False
+
+    sujet = conf_email.get("sujet", "Votre photo - {evenement}").format(
+        evenement=conf_event.get("nom", "Photobooth")
+    )
+    message = conf_email.get("message", "Voici votre photo !").format(
+        evenement=conf_event.get("nom", "Photobooth")
+    )
+
+    msg = MIMEMultipart()
+    msg["From"] = expediteur
+    msg["To"] = destinataire
+    msg["Subject"] = sujet
+    msg.attach(MIMEText(message, "plain", "utf-8"))
+
+    # Piece jointe
+    if chemin_photo.exists():
+        with open(chemin_photo, "rb") as f:
+            piece = MIMEBase("image", "jpeg")
+            piece.set_payload(f.read())
+            encoders.encode_base64(piece)
+            piece.add_header(
+                "Content-Disposition",
+                f"attachment; filename={chemin_photo.name}"
+            )
+            msg.attach(piece)
+
+    try:
+        with smtplib.SMTP(smtp_host, smtp_port, timeout=10) as serveur:
+            serveur.starttls()
+            serveur.login(smtp_user, smtp_password)
+            serveur.send_message(msg)
+        log.info(f"Email envoye a {destinataire}")
+        return True
+    except (smtplib.SMTPException, OSError) as e:
+        log.error(f"Erreur envoi email : {e}")
+        return False