fix: 修复配额说明重复和undefined问题

- 在editStorageForm中初始化oss_storage_quota_value和oss_quota_unit
- 删除重复的旧配额说明块，保留新的当前配额设置显示

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/node_modules/jackspeak/dist/esm/parse-args.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"parse-args.d.ts","sourceRoot":"","sources":["../../src/parse-args.ts"],"names":[],"mappings":";AAAA,OAAO,KAAK,IAAI,MAAM,MAAM,CAAA;AAoC5B,eAAO,MAAM,SAAS,uBAA6C,CAAA"}