update

lib/screens/battle_screen.dart

@@ -274,18 +274,23 @@ class _BattleScreenState extends State<BattleScreen> {
                 : "Armor";
             String successRate = "";
 
+            double baseChance = 0.0;
             switch (risk) {
               case RiskLevel.safe:
-                successRate = "100%";
+                baseChance = 1.0;
                 break;
               case RiskLevel.normal:
-                successRate = "80%";
+                baseChance = 0.8;
                 break;
               case RiskLevel.risky:
-                successRate = "40%";
+                baseChance = 0.4;
                 break;
             }
 
+            double finalChance = baseChance + (player.totalLuck / 100.0);
+            if (finalChance > 1.0) finalChance = 1.0;
+            successRate = "${(finalChance * 100).toInt()}%";
+
             infoText =
                 "Success: $successRate, Eff: ${(efficiency * 100).toInt()}% ($expectedValue $valueUnit)";
 

lib/screens/inventory_screen.dart

@@ -47,6 +47,11 @@ class InventoryScreen extends StatelessWidget {
                             "${player.gold} G",
                             color: Colors.amber,
                           ),
+                          _buildStatItem(
+                            "Luck",
+                            "${player.totalLuck}",
+                            color: Colors.green,
+                          ),
                         ],
                       ),
                     ],
@@ -575,6 +580,7 @@ class InventoryScreen extends StatelessWidget {
     if (item.atkBonus > 0) stats.add("+${item.atkBonus} ATK");
     if (item.hpBonus > 0) stats.add("+${item.hpBonus} HP");
     if (item.armorBonus > 0) stats.add("+${item.armorBonus} DEF");
+    if (item.luck > 0) stats.add("+${item.luck} Luck");
 
     // Include effects
     List<String> effectTexts = item.effects.map((e) => e.description).toList();