Init projet Photostation - borne impression photo tactile PyQt6

Structure : 4 écrans (accueil, import, éditeur, impression),
navigation QStackedWidget, base éditeur QGraphicsScene.

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

src/ui/screens/home_screen.py

@@ -0,0 +1,77 @@
+"""Écran d'accueil — choix du mode d'import."""
+
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QHBoxLayout, QPushButton, QLabel
+)
+from PyQt6.QtCore import Qt
+from PyQt6.QtGui import QFont
+
+
+class HomeScreen(QWidget):
+    def __init__(self, main_window):
+        super().__init__()
+        self.main_window = main_window
+        self._setup_ui()
+
+    def _setup_ui(self):
+        layout = QVBoxLayout(self)
+        layout.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.setSpacing(40)
+
+        # Titre
+        title = QLabel("Photostation")
+        title.setFont(QFont("", 48, QFont.Weight.Bold))
+        title.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(title)
+
+        subtitle = QLabel("Sélectionnez un mode d'import")
+        subtitle.setFont(QFont("", 20))
+        subtitle.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(subtitle)
+
+        # Boutons d'import
+        buttons_layout = QHBoxLayout()
+        buttons_layout.setSpacing(20)
+
+        modes = [
+            ("USB", "Clé USB", self._import_usb),
+            ("WiFi", "Depuis téléphone", self._import_wifi),
+            ("QR Code", "Scanner pour envoyer", self._import_qr),
+            ("Email", "Recevoir par mail", self._import_email),
+        ]
+
+        for label, desc, callback in modes:
+            btn = self._create_mode_button(label, desc)
+            btn.clicked.connect(callback)
+            buttons_layout.addWidget(btn)
+
+        layout.addLayout(buttons_layout)
+
+    def _create_mode_button(self, label, description):
+        btn = QPushButton(f"{label}\n{description}")
+        btn.setFont(QFont("", 16))
+        btn.setMinimumSize(200, 150)
+        btn.setStyleSheet("""
+            QPushButton {
+                background-color: #2196F3;
+                color: white;
+                border-radius: 15px;
+                padding: 20px;
+            }
+            QPushButton:pressed {
+                background-color: #1976D2;
+            }
+        """)
+        return btn
+
+    def _import_usb(self):
+        self.main_window.show_import()
+
+    def _import_wifi(self):
+        self.main_window.show_import()
+
+    def _import_qr(self):
+        self.main_window.show_import()
+
+    def _import_email(self):
+        self.main_window.show_import()