feat: 每个模式分别记忆AI难度、手牌上限、总玩家数

app/src/main/java/com/unogame/game/GameRules.kt

@@ -75,5 +75,17 @@ data class GameRules(
             GameMode.NO_MERCY -> 10
             else -> 0  // no limit for other modes
         }
+
+        private const val PLAYERS_KEY_PREFIX = "players_"
+
+        fun loadPlayerCount(context: Context, mode: GameMode): Int {
+            return context.getSharedPreferences("unogame_prefs", Context.MODE_PRIVATE)
+                .getInt(PLAYERS_KEY_PREFIX + mode.name, 2)
+        }
+
+        fun savePlayerCount(context: Context, mode: GameMode, count: Int) {
+            context.getSharedPreferences("unogame_prefs", Context.MODE_PRIVATE)
+                .edit().putInt(PLAYERS_KEY_PREFIX + mode.name, count).apply()
+        }
     }
 }

app/src/main/java/com/unogame/game/SimpleAI.kt

@@ -10,17 +10,19 @@ enum class AIDifficulty(val displayName: String) {
     HARD("困难");
 
     companion object {
-        private const val KEY = "ai_difficulty"
+        private const val KEY_PREFIX = "ai_diff_"
 
-        fun load(context: Context): AIDifficulty {
+        fun load(context: Context, mode: GameMode): AIDifficulty {
+            val key = KEY_PREFIX + mode.name
             val name = context.getSharedPreferences("unogame_prefs", Context.MODE_PRIVATE)
-                .getString(KEY, NORMAL.name) ?: NORMAL.name
+                .getString(key, NORMAL.name) ?: NORMAL.name
             return try { valueOf(name) } catch (_: Exception) { NORMAL }
         }
 
-        fun save(context: Context, diff: AIDifficulty) {
+        fun save(context: Context, mode: GameMode, diff: AIDifficulty) {
+            val key = KEY_PREFIX + mode.name
             context.getSharedPreferences("unogame_prefs", Context.MODE_PRIVATE)
-                .edit().putString(KEY, diff.name).apply()
+                .edit().putString(key, diff.name).apply()
         }
     }
 }

app/src/main/java/com/unogame/ui/screens/LocalGameScreen.kt

@@ -128,7 +128,7 @@ fun LocalGameScreen(
     val context = LocalContext.current
     val rules = remember { GameRules.forMode(mode, GameRules.loadMaxHandSize(context, mode)) }
     val engine = remember { GameEngine(rules) }
-    val aiDiff = remember { AIDifficulty.load(context) }
+    val aiDiff = remember { AIDifficulty.load(context, mode) }
     val gameStartTime = remember { System.currentTimeMillis() }
 
     val players = remember {

app/src/main/java/com/unogame/ui/screens/LocalSetupScreen.kt

@@ -34,10 +34,10 @@ fun LocalSetupScreen(
     onStartGame: (Int, String, List<String>) -> Unit,
     onBack: () -> Unit
 ) {
-    var totalPlayers by remember { mutableIntStateOf(2) }
-    var name by remember { mutableStateOf(playerName) }
-    var difficulty by remember { mutableStateOf(com.unogame.game.AIDifficulty.NORMAL) }
     val context = androidx.compose.ui.platform.LocalContext.current
+    var totalPlayers by remember { mutableIntStateOf(com.unogame.game.GameRules.loadPlayerCount(context, mode)) }
+    var name by remember { mutableStateOf(playerName) }
+    var difficulty by remember { mutableStateOf(com.unogame.game.AIDifficulty.load(context, mode)) }
     val initMaxHandSize = remember { com.unogame.game.GameRules.loadMaxHandSize(context, mode) }
     var maxHandSize by remember { mutableIntStateOf(initMaxHandSize) }
 
@@ -310,8 +310,9 @@ fun LocalSetupScreen(
 
             Button(
                 onClick = {
-                    com.unogame.game.AIDifficulty.save(context, difficulty)
+                    com.unogame.game.AIDifficulty.save(context, mode, difficulty)
                     com.unogame.game.GameRules.saveMaxHandSize(context, mode, maxHandSize)
+                    com.unogame.game.GameRules.savePlayerCount(context, mode, totalPlayers)
                     onStartGame(totalPlayers, name.ifBlank { "玩家" }, botNames.take(totalPlayers - 1))
                 },
                 modifier = Modifier.fillMaxWidth().height(56.dp),