fix: 清除硬编码API Key与机器特定路径，改用环境变量+混合式路径解析

test-data/s30_db_e2e.py

@@ -5,8 +5,8 @@ P=0;F=0
 def ck(v,m=""): global P,F; (P:=P+1) if v else (F:=F+1, print(f"  FAIL {m}"))
 def sec(n): print(f"\n{'='*60}\n{n}\n{'='*60}")
 
-DESKTOP = os.path.join(os.environ['USERPROFILE'], "Desktop")
-ROOT = os.path.join(DESKTOP, "2026技术大赛", "cobol-tna-system") + "/"
+from _paths import TNA_ROOT, require
+ROOT = str(require(TNA_ROOT, "TNA 测试数据", "COBOL_TNA_ROOT")) + "/"
 COPYBOOKS = [os.path.join(ROOT, "cpy"), os.path.join(ROOT, "src")]
 
 from config import Config