fix(security): retire default-credential surface (yanxue-20260914-cma-defaultcred-code-fix)

- Login.vue: no prefilled default creds; no anonymous entity enumeration on mount

- deploy.sh: readiness polling (0.5s/30s cap) replaces fixed sleep 3; login smoke reads same-source 600 secret file, missing file = explicit abort

- 19 verify/check/gen_report scripts: shared _admin_creds() loader (CMA_ADMIN_ENV -> ops .secrets -> profile copy); no hardcoded creds

- tests: single TEST_USER_PASSWORD fixture constant; docs: pointer to 600 secret file; removed 4 legacy .bak + pycache residue

backend/tests/test_reports.py

@@ -9,7 +9,7 @@ generate(weekly/monthly/special) / history / history/{id}
 import pytest
 from fastapi.testclient import TestClient
 from sqlalchemy.orm import Session
-from tests.conftest import create_test_user, get_token_for_user, auth_header
+from tests.conftest import create_test_user, get_token_for_user, auth_header, TEST_USER_PASSWORD
 from app.models import (
     KPIDefinition, KPIValue, BudgetPlan, StrategicMap, KPIAlert, ActionPlan,
     Subject, ReportHistory,
@@ -668,7 +668,7 @@ class TestDupont:
             db.add(UserEntity(user_id=user.id, entity_id=entity_id))
             db.commit()
         resp = client.post("/api/cma/auth/login", json={
-            "username": "testadmin", "password": "admin123", "entity_id": entity_id,
+            "username": "testadmin", "password": TEST_USER_PASSWORD, "entity_id": entity_id,
         })
         assert resp.status_code == 200, f"账套登录失败({entity_id}): {resp.status_code} {resp.text[:200]}"
         return resp.json()["token"]