refactor(runner拆件): 令牌池与商店族拆出两件＋断点字段登记单源（零行为变更）

- curio_deck.gd（新增）：令牌多重集/抽签/cap/凭证三计数与判定唯一宿主，随机经注入 rg 面；宿主公开面委托保持原签名
- shop_session.gd（新增）：双模式货架/定价/购买/刷新入件，钱包原语留宿主经回调落账
- adventure_runner：BREAKPOINT_FIELDS 27 键登记单源驱动写侧拼装与两处读侧回退；续玩段拆为六小函数
- level_runner：商店族 21 函数转委托层，9 个成员改转发属性（类变量计数保持 38）
- breakpoint_resume_test：新增 P8 键集==写侧实拼键集与策略标签词表断言〔wr2〕

game/tests/unit/core/breakpoint_resume_test.gd

@@ -181,8 +181,32 @@ func _init() -> void:
 	Kit.check_quiet(adr_n.start_adventure(910042, params) and adr_n.runner().nodes() == graph_j,
 		"P7 同种子重开局同图（开局入口复现承载）〔v7〕")
 
+	# ---- Part 8：断点字段登记单源（登记键集 == 写侧实拼字典键集；键名增删即红）----
+	var fields: Dictionary = AdventureRunnerScript.BREAKPOINT_FIELDS
+	var reg_keys: Array = fields.keys()
+	reg_keys.sort()
+	var bp_keys: Array = bp_j.keys()
+	bp_keys.sort()
+	Kit.check_quiet(reg_keys == bp_keys,
+		"P8 登记单源键集 == 写侧实拼断点键集（%d 键逐一对齐）〔wr2〕" % reg_keys.size())
+	var frozen_keys := ["adventure_counters", "attunement_charges", "attune_refresh_y", "aux_items",
+		"bonus", "bonus_deck", "bonus_pending", "bonus_result", "bonus_taken", "feat_ticket_pity",
+		"feat_ticket_sold", "gp", "graph_gen_v2", "hero_hp", "keystone", "keystone_drops",
+		"level_index", "master_seed", "node_id", "refresh_stock", "relics", "rng_counter",
+		"shop_purchased", "shop_shelf", "shop_visit_buys", "visited_ids", "vision_counter_used"]
+	frozen_keys.sort()
+	Kit.check_quiet(reg_keys == frozen_keys,
+		"P8 键集与冻结清单逐位一致（27 键契约；增删键即红）〔wr2〕")
+	var vocab := ["plain", "clamp", "keep_on_null", "dual_merge", "params_fallback", "token_migration"]
+	var stray: Array = []
+	for k in fields.keys():
+		var strat := String((fields[k] as Dictionary).get("strategy", ""))
+		if not vocab.has(strat):
+			stray.append("%s=%s" % [k, strat])
+	Kit.check_quiet(stray.is_empty(), "P8 策略标签全落六类词表（越界=%s）〔wr2〕" % str(stray))
+
 	_clear_disk()
-	quit(Kit.finish("breakpoint_resume_test", "PASS — 断点往返/续玩确定性/幂等/退出清断点/装配存档回归/生成图换代 全绿"))
+	quit(Kit.finish("breakpoint_resume_test", "PASS — 断点往返/续玩确定性/幂等/退出清断点/装配存档回归/生成图换代/字段单源 全绿"))
 
 
 # 句柄寻址夹具辅助：取生成图中指定句柄节点的首个出边目标（构造中途停点落档形态）