Tarification + écran récap avec prix

Config admin :
- Tarification activable avec paliers (ex: 1-5 = 0.50€, 6-10 = 0.40€)
- Fonction calculate_price() utilitaire

Galerie :
- Affiche "X impressions — Y.YY €" quand tarification activée

Écran impression/récap :
- Galerie des photos sélectionnées avec miniatures + quantité (xN)
- Prix total en haut
- Choix du format d'impression
- Bouton IMPRIMER

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

src/ui/widgets/config_dialog.py

@@ -37,6 +37,16 @@ DEFAULT_CONFIG = {
         "13x18": {"enabled": False, "printer": "", "ratio": 1.385},
         "15x20": {"enabled": False, "printer": "", "ratio": 1.333},
     },
+    # Tarification
+    "pricing": {
+        "enabled": True,
+        "currency": "€",
+        "tiers": [
+            {"from": 1, "to": 5, "price": 0.50},
+            {"from": 6, "to": 10, "price": 0.40},
+            {"from": 11, "to": 999, "price": 0.30},
+        ],
+    },
 }
 
 
@@ -51,6 +61,25 @@ def load_config():
         return dict(DEFAULT_CONFIG)
 
 
+def calculate_price(quantity, config=None):
+    """Calcule le prix total pour une quantité donnée selon les paliers."""
+    if config is None:
+        config = load_config()
+    pricing = config.get("pricing", DEFAULT_CONFIG.get("pricing", {}))
+    if not pricing.get("enabled", False) or quantity <= 0:
+        return 0.0
+    tiers = pricing.get("tiers", [])
+    # Trouver le palier applicable
+    unit_price = 0.0
+    for tier in tiers:
+        if tier["from"] <= quantity <= tier["to"]:
+            unit_price = tier["price"]
+            break
+    if unit_price == 0.0 and tiers:
+        unit_price = tiers[-1]["price"]
+    return quantity * unit_price
+
+
 def save_config(config):
     os.makedirs(os.path.dirname(CONFIG_PATH), exist_ok=True)
     with open(CONFIG_PATH, "w") as f:
@@ -235,6 +264,47 @@ class ConfigDialog(QDialog):
             self.format_widgets[fmt_name] = {"checkbox": cb, "printer": printer}
             row += 1
 
+        # ── Tarification ──
+        grid.addWidget(self._section_title("Tarification"), row, 0, 1, 2)
+        row += 1
+
+        pricing = self.config.get("pricing", DEFAULT_CONFIG["pricing"])
+
+        grid.addWidget(self._label("Activer :"), row, 0)
+        self.pricing_enabled_cb = QCheckBox("Afficher les prix")
+        self.pricing_enabled_cb.setFont(QFont("", 12))
+        self.pricing_enabled_cb.setChecked(pricing.get("enabled", True))
+        grid.addWidget(self.pricing_enabled_cb, row, 1)
+        row += 1
+
+        self.tier_widgets = []
+        tiers = pricing.get("tiers", [])
+        for i, tier in enumerate(tiers):
+            lbl = QLabel(f"De {tier['from']} à {tier['to']} :")
+            lbl.setFont(QFont("", 12))
+            lbl.setAlignment(Qt.AlignmentFlag.AlignRight | Qt.AlignmentFlag.AlignVCenter)
+            grid.addWidget(lbl, row, 0)
+
+            price_row = QHBoxLayout()
+            from_sb = self._spinbox(tier["from"], 1, 999)
+            to_sb = self._spinbox(tier["to"], 1, 999)
+            price_input = self._input(f"{tier['price']:.2f}", "0.50")
+            price_input.setMaximumWidth(80)
+            price_row.addWidget(QLabel("de"))
+            price_row.addWidget(from_sb)
+            price_row.addWidget(QLabel("à"))
+            price_row.addWidget(to_sb)
+            price_row.addWidget(QLabel("="))
+            price_row.addWidget(price_input)
+            price_row.addWidget(QLabel("€/photo"))
+
+            tier_container = QWidget()
+            tier_container.setLayout(price_row)
+            grid.addWidget(tier_container, row, 1)
+
+            self.tier_widgets.append({"from": from_sb, "to": to_sb, "price": price_input})
+            row += 1
+
         scroll.setWidget(content)
         layout.addWidget(scroll, 1)
 
@@ -286,6 +356,23 @@ class ConfigDialog(QDialog):
             formats[fmt_name]["enabled"] = widgets["checkbox"].isChecked()
             formats[fmt_name]["printer"] = widgets["printer"].text()
         self.config["formats"] = formats
+        # Tarification
+        tiers = []
+        for tw in self.tier_widgets:
+            try:
+                price = float(tw["price"].text().replace(",", "."))
+            except ValueError:
+                price = 0.0
+            tiers.append({
+                "from": tw["from"].value(),
+                "to": tw["to"].value(),
+                "price": price,
+            })
+        self.config["pricing"] = {
+            "enabled": self.pricing_enabled_cb.isChecked(),
+            "currency": "€",
+            "tiers": tiers,
+        }
         save_config(self.config)
         self.accept()