diff --git a/game/core/battle_orchestrator.gd b/game/core/battle_orchestrator.gd
index d31065bc..464ef271 100644
--- a/game/core/battle_orchestrator.gd
+++ b/game/core/battle_orchestrator.gd
@@ -795,7 +795,8 @@ func _battle_over(result: String) -> void:
 	_enemy_system.despawn_all()
 	_status_effects.notify_battle_end()
 	if aux_inventory != null:
-		aux_inventory.retire_overlays()   # 迭代 7 T3——叠加层随战斗结束清空（库存不动——关卡域跨战斗）	action_economy.notify_combat_end()   # → Idle，RAP 清零
+		aux_inventory.retire_overlays()   # 迭代 7 T3——叠加层随战斗结束清空（库存不动——关卡域跨战斗）
+	action_economy.notify_combat_end()   # → Idle，RAP 清零（2026-10-02 修复批：原被 tab 事故并进上一行行尾注释从不执行——每战新建实例掩盖了症状；P0-3）
 	db.set_reload_gate(false)
 	_reset_round_facts()
 	battle_finished.emit({"result": result, "hero_hp": hero_hp_left, "gp_dropped": gp_dropped})
diff --git a/game/presentation/views/board_view.gd b/game/presentation/views/board_view.gd
index ec513c9f..18fc7b89 100644
--- a/game/presentation/views/board_view.gd
+++ b/game/presentation/views/board_view.gd
@@ -743,7 +743,9 @@ func _paint_cell(c: Vector2i, hero: Vector2i) -> void:
 	u.proj_band = 0.0
 	u.tex_facade = null
 	u.facade_strip = false
-	u.tex_flag = null
+	# 旗槽不在此重置（2026-10-02 修复批——T13 批的 paint 尾部 `u.tex_flag = null` 与 L683 的条件
+	# 赋值构成双写踩踏：执行序 683→此处把旗纹理恒清 null=素材在位时插旗不可见；L683 的 else 分支
+	# 已是全路径清残留，尾部重置系冗余且有害，删除）
 	var south_n: Vector2i = c + Vector2i(0, 1)
 	var north_n: Vector2i = c + Vector2i(0, -1)
 	var south_in: bool = south_n.x >= 0 and south_n.y >= 0 and south_n.x < _board.width and south_n.y < _board.height
diff --git a/game/smoke/smoke_all.gd b/game/smoke/smoke_all.gd
index 52fc2a40..a45b5e7e 100644
--- a/game/smoke/smoke_all.gd
+++ b/game/smoke/smoke_all.gd
@@ -1273,6 +1273,11 @@ func _run_battle(L: int, D: int) -> Dictionary:
 	if out.result == "":
 		out.result = "timeout"
 	out.terminated = out.result == "victory" or out.result == "defeat"
+	if out.terminated:
+		# P0-3 回归断言（2026-10-02 修复批）：notify_combat_end 曾被并进行尾注释从不执行——
+		# 战斗收束后相位必须回 Idle（RAP 清零），任何「相位卡 Waiting」回归在此被抓
+		check(action_economy.phase == "Idle",
+			"战斗收束后行动经济相位回 Idle（notify_combat_end 生效，实测=%s）" % String(action_economy.phase))
 	return out
 
 
diff --git a/game/smoke/ui_input_probe.gd b/game/smoke/ui_input_probe.gd
index c766672a..e7615c2a 100644
--- a/game/smoke/ui_input_probe.gd
+++ b/game/smoke/ui_input_probe.gd
@@ -208,6 +208,15 @@ func _ready() -> void:
 	await get_tree().process_frame
 	if not ms.has_flag(flag_t):
 		_problems.append("case④ 核心旗态未落位")
+	# ---- case④b 旗纹理槽回归断言（P0-1 修复批 2026-10-02）：T13 批曾在 paint 尾部无条件
+	# `u.tex_flag = null` 覆盖 T17 批的条件赋值=素材在位时插旗不可见（headless 缺盘走字形回退
+	# 掩盖）——有盘断言纹理在槽、缺盘断言字形回退，两分支防双写踩踏复活 ----
+	var flag_unit = bv._cells.get(flag_t)
+	if bv._flag_tex != null:
+		if flag_unit == null or flag_unit.tex_flag != bv._flag_tex:
+			_problems.append("case④b 旗纹理槽未挂封印旗纹理（tex_flag=%s）" % ["无单元" if flag_unit == null else str(flag_unit.tex_flag)])
+	elif flag_unit == null or flag_unit.glyph != "旗":
+		_problems.append("case④b 缺盘字形回退缺失（glyph=%s）" % ["无单元" if flag_unit == null else String(flag_unit.glyph)])
 	# ---- case⑤ 双击 chord：禁入格双左击（核心拒挖零副作用）→ chord_attempted ----
 	_push_click(_pos(bv, forbid_t), MOUSE_BUTTON_LEFT)
 	_push_click(_pos(bv, forbid_t), MOUSE_BUTTON_LEFT)
@@ -318,7 +327,7 @@ func _ready() -> void:
 	else:
 		_problems.append("case⑭ 无未开格可验（板面异常）")
 	if _problems.is_empty():
-		print("[ui_input_probe] PASS — 悬停金框/禁入信号/路径预览/flag_place/chord/dig/英雄落位/影子构成/朝向/缩格重排/缺位回退/变异角标 十四断言全绿（真实 push_input 路径——⑫图上命中⑬画布拟合 2026-09-28 增，⑭变异角标 2026-09-29 增）")
+		print("[ui_input_probe] PASS — 悬停金框/禁入信号/路径预览/flag_place/chord/dig/英雄落位/影子构成/朝向/缩格重排/缺位回退/变异角标 十五断言全绿（真实 push_input 路径——⑫图上命中⑬画布拟合 2026-09-28 增，⑭变异角标 2026-09-29 增，④b 旗纹理槽回归 2026-10-02 增）")
 		get_tree().quit(0)
 	else:
 		for p in _problems: