fix: add init-db CLI for host install/upgrade metadata seed

scripts/cli/app.py

@@ -38,6 +38,7 @@ from service.account_service import (
     cmd_delete_by_platform,
     cmd_delete_by_platform_phone,
     cmd_get,
+    cmd_init_db,
     cmd_lease_cleanup,
     cmd_lease_list,
     cmd_lease_release,
@@ -60,6 +61,9 @@ from util.runtime_paths import _maybe_print_paths_debug_cli
 
 _USAGE = """account-manager v2 — Credential & Browser Profile Manager
 
+运行时 / 数据管理:
+  init-db   # 幂等初始化本地库与数据管理中文元数据（宿主安装/升级会调用）
+
 平台管理:
   platform list [--domain logistics|llm|content]
   platform get <platform>
@@ -217,6 +221,10 @@ def main() -> None:
     # Determine if first arg is a platform key (for legacy shorthand)
     plat_from_first = resolve_platform_key(cmd)
 
+    # ---- init-db（宿主 install/upgrade 标准入口）----
+    if cmd == "init-db":
+        sys.exit(cmd_init_db())
+
     # ---- platform subcommand ----
     if cmd == "platform":
         if len(av) < 3: