fix(cli): add encryption commands to USAGE string

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/cli/app.py

@@ -4,7 +4,8 @@ CLI entry point: argv dispatch for account-manager v2.
 
 Subcommand tree:
   platform  list/get
-  account   add-web|add-secret|get|get-credential|list|pick-web|mark-session|mark-error|mark-used
+  account   add-web|add-secret|get|get-credential|list|pick-web|mark-session|mark-error|mark-used|open
+            init-master-key|export-credentials|import-credentials
   credential pick|resolve
   lease     release|list|cleanup
   (legacy)  add|list|get|list-json|pick-web|open|delete
@@ -82,6 +83,9 @@ _USAGE = """account-manager v2 — Credential & Browser Profile Manager
   account mark-error <id> --code <code> --message <msg>
   account mark-used <id>
   account open <id>
+  account init-master-key [--print|--from-env|--rotate]
+  account export-credentials --plaintext
+  account import-credentials [--replace-all] < backup.json
 
 凭据管理:
   credential pick --platform <p> [--type <type>] [--environment <env>]