feat: 港股板块指数全量拓展——EM所属行业覆盖253只(50个行业)+自建板块指数137个，sector_slope因子对港股全量生效

strategy_lab.py

@@ -391,7 +391,7 @@ def prepare_sector_context(start_date, end_date):
             e['inflow'] = round(inflow or 0, 1)
             if 'change' not in e or e.get('change') is None:
                 e['change'] = round(chg or 0, 2)
-        # 3. 个股→行业映射：优先 EM 体系（覆盖全，与 sector_index_daily 对齐），THS 兜底
+        # 3. 个股→行业映射：优先 EM 体系（覆盖全，与 sector_index_daily 对齐），THS/港股体系兜底
         try:
             for code, sec in conn.execute("SELECT code, sector FROM stock_sectors_em").fetchall():
                 _STOCK_SECTOR[code] = sec
@@ -399,7 +399,7 @@ def prepare_sector_context(start_date, end_date):
             pass
         for code, sec, src in conn.execute(
                 "SELECT code, sector_name, source FROM stock_sectors").fetchall():
-            if code not in _STOCK_SECTOR and src == 'ths':
+            if code not in _STOCK_SECTOR and src in ('ths', 'hk_em', 'hk_manual'):
                 _STOCK_SECTOR[code] = sec
     finally:
         conn.close()