硬性策略质量门禁 validate_strategy()

新增 STRATEGY_QUALITY_GATES 检查清单（9条红线）：
CRITICAL: 止损/止盈存在+>0, 买入区下沿<上沿
HIGH: 止损≤买入区, 买入推荐含RR≥1.5, 港股标currency=HKD
MEDIUM: signal短词, tech_snapshot含技术位

enforce_strategy_quality() 插在写入链的两处：
1. reassess_with_context() return前 → 单只重评必过
2. regenerate_all() for d in decisions: 写DB前 → 批量重评必过

不过的：status=review_needed, signal降级→信号不充分
不会写进DB/JSON，除非修复了CRITICAL问题

scripts/macro_context_collector.py

@@ -40,8 +40,8 @@ HIGH_PATTERNS = [
     r"fed.*(?:emergency|unexpected|surprise|hike|cut)",
     # 指数暴跌（需 ≥2% 跌幅或使用更强范围词）
     r"指数[^。]*?(?:暴跌|熔断|闪崩|重挫)",
-    r"指数[^。]*?(?:跌幅|下跌)[^。]*?[2-9]%",
-    r"(?:暴跌|重挫|熔断).*[5-9]%",
+    r"指数[^。]*?(?:跌幅[^。]{0,20}(?:扩大至|达|至|超|为|逾)[^。]*?(?<![0-9.])(?:[2-9]|[1-9][0-9])(?:\.\d+)?%|下跌(?!.*?涨)[^。]*?(?<![0-9.])(?:[2-9]|[1-9][0-9])(?:\.\d+)?%)",
+    r"(?:暴跌|重挫|熔断).*?(?<![0-9.])(?:[5-9]|[1-9][0-9])(?:\.\d+)?%",
     r"熔断|闪崩",
     # 地缘+贸易
     r"关税.*(?:升级|新|报复|制裁)",
@@ -82,7 +82,7 @@ MEDIUM_PATTERNS = [
 # 旧版有 银行.*倒闭|挤兑|破产 , 新版有 银行.*(?:倒闭|挤兑|破产
 _PATTERN_CHECKS = {
     8: ["暴跌|熔断|闪崩|重挫"],  # index pattern must use strong crash words, not "跌幅"
-    9: ["[2-9]%"],  # 指数+跌幅 requires ≥2%
+    9: ["(?<![0-9.])", "(?:扩大至|达|至|超|为|逾)"],  # new: negative lookbehind for decimals + measurement words for 跌幅
     14: ["核(?:威胁", "核威胁|武器|弹头"],  # must NOT have standalone 核
     18: ["倒闭|挤兑|破产"],  # bank pattern must have crisis keywords
     19: ["金融危机(?:风险", "危机|债务危机"],  # must NOT have standalone 金融危机
@@ -90,6 +90,7 @@ _PATTERN_CHECKS = {
 _KNOWN_BAD_SIGS = {
     # Known stale .pyc signature fragments that indicate wrong version
     "指数.*跌幅": "旧版用 .* 跨句匹配且无 ≥2% 阈值",
+    "[2-9]%(?!\")": "旧版 pattern 9 无上下文限制和阈值修复（新版用 (?:[2-9]|[1-9][0-9])(?:\\.\\d+)?% 替代 [2-9]%）",
     "|核|": "旧版有独立单字核",
     "英伟达|nvidia.*跌": "旧版 alternation 分组错误",
     "导弹.*发射": "旧版只匹配发射不匹配袭击",