feat(meta): 碎片奖励阈值表(balance.json)+aether_for_wave+清除数据钩子

scripts/autoloads/settings_manager.gd

@@ -33,6 +33,7 @@ func complete_ftue(chosen_difficulty: int) -> void:
 ## get() 的默认仅为防崩溃，非内容副本
 var _MULTS: Dictionary = {}    # key → [初学者, 标准, 挑战]
 var _BOSS_HP: Dictionary = {}  # 原型→基础血量
+var _AETHER_THRESHOLDS: Array = []   # [[到达波次, 碎片], ...] 升序
 
 const BALANCE_JSON: String = "res://data/balance.json"
 
@@ -49,6 +50,17 @@ func boss_hp_mult() -> float:          return _mult("boss_hp")
 func get_boss_base_hp(boss_type: int) -> float:
 	return float(_BOSS_HP.get(str(boss_type), 500.0))
 
+## 到达波次 → 以太碎片（阶梯查表：取"波次阈值 ≤ wave"的最高阶梯值；升序表）
+func aether_for_wave(wave: int) -> int:
+	var table: Array = _AETHER_THRESHOLDS
+	if table.is_empty():
+		table = [[1, 0], [5, 3], [10, 8], [15, 14], [20, 20]]
+	var result: int = 0
+	for entry in table:
+		if entry is Array and entry.size() >= 2 and int(entry[0]) <= wave:
+			result = int(entry[1])
+	return result
+
 ## 数据驱动：加载 balance.json（难度乘子 + Boss 血量）
 func _load_balance() -> void:
 	if not FileAccess.file_exists(BALANCE_JSON):
@@ -63,6 +75,8 @@ func _load_balance() -> void:
 			_MULTS[k] = data["difficulty_mults"][k]
 	if data.has("boss_hp") and data["boss_hp"] is Dictionary:
 		_BOSS_HP = data["boss_hp"]
+	if data.has("aether_thresholds") and data["aether_thresholds"] is Array:
+		_AETHER_THRESHOLDS = data["aether_thresholds"]
 
 func difficulty_name() -> String:
 	return ["DIFF_BEGINNER", "DIFF_STANDARD", "DIFF_CHALLENGE"][difficulty]
@@ -111,6 +125,7 @@ func clear_all_local_data() -> void:
 	var pm: Node = get_node_or_null("/root/ProfileManager")
 	if pm and pm.has_method("clear_run"):
 		pm.clear_run()
+	MetaProgress.clear()
 	_apply_audio()
 
 func _remove_dir_recursive(path: String) -> void: