feat: 3D-Statistik Gewinn-Sektion + Status-Badges im zugeklappten Zustand

backend/src/routes/dashboard.js

@@ -133,7 +133,38 @@ router.get('/stats', authenticate, (req, res) => {
     byStatus[r.status] = r.c;
   }
 
-  res.json({ totalOrders, bezahltOrders, totalRevenue, offeneRevenue, ordersThisMonth, totalCalcs, byStatus });
+  // Grundkosten berechnen (preis_freundschaft = Selbstkosten pro Stück aus Kalkulation)
+  function getBaseCost(orderId) {
+    const items = db.prepare(`
+      SELECT oi.stueckzahl, oi.custom_price,
+             COALESCE(c.preis_freundschaft, oi.preis_freundschaft) as basis
+      FROM order_items oi
+      LEFT JOIN calculations c ON c.id = oi.calculation_id
+      WHERE oi.order_id = ?
+    `).all(orderId);
+    return items.reduce((sum, i) => sum + (i.basis * i.stueckzahl), 0);
+  }
+
+  function getRevenue(order) {
+    if (order.custom_price != null) return parseFloat(order.custom_price);
+    return db.prepare('SELECT COALESCE(SUM(custom_price*stueckzahl),0) s FROM order_items WHERE order_id=? AND custom_price IS NOT NULL').get(order.id).s;
+  }
+
+  let totalProfit = 0;
+  for (const o of paidOrders) {
+    const rev  = getRevenue(o);
+    const cost = getBaseCost(o.id);
+    totalProfit += rev - cost;
+  }
+
+  let offeneProfit = 0;
+  for (const o of openOrders) {
+    const rev  = getRevenue(o);
+    const cost = getBaseCost(o.id);
+    offeneProfit += rev - cost;
+  }
+
+  res.json({ totalOrders, bezahltOrders, totalRevenue, offeneRevenue, ordersThisMonth, totalCalcs, byStatus, totalProfit, offeneProfit });
 });
 
 // ── Ideen-Board ───────────────────────────────────────────────────────────────