Ajout logo CopyDev, icone et page A propos professionnelle

- Logo CopyDev 500x500 + icone 64x64
- Icone affichee dans la barre de titre et la taskbar
- Page A propos avec logo, version, description, coordonnees
  contact@copydev.fr, www.copydev.fr, copyright 2026

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

app/main_window.py

@@ -36,6 +36,13 @@ class MainWindow(QMainWindow):
         super().__init__()
         self.setWindowTitle("Copydev Imposing Tool")
         self.setMinimumSize(1000, 700)
+
+        # Icone de la fenetre
+        from PyQt6.QtGui import QIcon
+        icon_path = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+                                 "resources", "logo.png")
+        if os.path.exists(icon_path):
+            self.setWindowIcon(QIcon(icon_path))
         self._current_file = None
         self._result_file = None
         self._setup_menu()
@@ -331,11 +338,75 @@ class MainWindow(QMainWindow):
                 QMessageBox.critical(self, "Erreur", str(e))
 
     def _show_about(self):
-        QMessageBox.about(
-            self,
-            "A propos",
-            "Copydev Imposing Tool\n\n"
-            "Outil d'imposition PDF\n"
-            "Remplace Quite Imposing Plus\n\n"
-            "Copydev 2026"
+        from PyQt6.QtWidgets import QDialog, QVBoxLayout, QHBoxLayout, QLabel, QDialogButtonBox
+        from PyQt6.QtGui import QPixmap
+        from PyQt6.QtCore import Qt
+
+        dlg = QDialog(self)
+        dlg.setWindowTitle("A propos")
+        dlg.setFixedSize(480, 380)
+        layout = QVBoxLayout(dlg)
+
+        # Logo
+        logo_label = QLabel()
+        logo_path = os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+                                 "resources", "logo.png")
+        if os.path.exists(logo_path):
+            pixmap = QPixmap(logo_path).scaled(120, 120, Qt.AspectRatioMode.KeepAspectRatio,
+                                                Qt.TransformationMode.SmoothTransformation)
+            logo_label.setPixmap(pixmap)
+        logo_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(logo_label)
+
+        # Titre
+        title = QLabel("<h2>Copydev Imposing Tool</h2>")
+        title.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        layout.addWidget(title)
+
+        # Version
+        version = QLabel("Version 1.0.0")
+        version.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        version.setStyleSheet("color: #666;")
+        layout.addWidget(version)
+
+        layout.addSpacing(10)
+
+        # Description
+        desc = QLabel(
+            "Outil professionnel d'imposition PDF.\n"
+            "Creation de livrets, n-up, repetition, imposition manuelle,\n"
+            "numerotation, masquage et fonds perdus."
         )
+        desc.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        desc.setWordWrap(True)
+        layout.addWidget(desc)
+
+        layout.addSpacing(15)
+
+        # Coordonnees
+        contact = QLabel(
+            '<p style="text-align:center;">'
+            '<b>CopyDev</b><br>'
+            'Jules Dubois<br>'
+            '<a href="mailto:contact@copydev.fr">contact@copydev.fr</a><br>'
+            '<a href="https://copydev.fr">www.copydev.fr</a>'
+            '</p>'
+        )
+        contact.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        contact.setOpenExternalLinks(True)
+        layout.addWidget(contact)
+
+        layout.addSpacing(5)
+
+        # Copyright
+        copy_label = QLabel("© 2026 CopyDev — Tous droits reserves")
+        copy_label.setAlignment(Qt.AlignmentFlag.AlignCenter)
+        copy_label.setStyleSheet("color: #999; font-size: 11px;")
+        layout.addWidget(copy_label)
+
+        # Bouton Fermer
+        buttons = QDialogButtonBox(QDialogButtonBox.StandardButton.Close)
+        buttons.rejected.connect(dlg.close)
+        layout.addWidget(buttons)
+
+        dlg.exec()