🛂 Fix #16: Validate number fields to prevent NaN issues

screens/moves/MoveFormScreen.tsx

@@ -102,14 +102,22 @@ const MoveFormScreen = ({ navigation, route }: Props) => {
             <Text style={styles.label}>Power: </Text>
             <TextInput
                 value={move.power.toString()}
-                onChangeText={(text) => setMove({ ...move, power: Number(text) })}
+                onChangeText={(text) => {
+                    if (!isNaN(Number(text))) {
+                        setMove({ ...move, power: Number(text) });
+                    }
+                }}
                 style={styles.input}
                 keyboardType="numeric"
             />
             <Text style={styles.label}>Accuracy: </Text>
             <TextInput
                 value={move.accuracy.toString()}
-                onChangeText={(text) => setMove({ ...move, accuracy: Number(text) })}
+                onChangeText={(text) => {
+                    if (!isNaN(Number(text))) {
+                        setMove({ ...move, accuracy: Number(text) });
+                    }
+                }}
                 style={styles.input}
                 keyboardType="numeric"
             />