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/file-uri-to-path/test/tests.json

@@ -0,0 +1,13 @@
+{
+  "file://host/path": "\\\\host\\path",
+  "file://localhost/etc/fstab": "\\etc\\fstab",
+  "file:///etc/fstab": "\\etc\\fstab",
+  "file:///c:/WINDOWS/clock.avi": "c:\\WINDOWS\\clock.avi",
+  "file://localhost/c|/WINDOWS/clock.avi": "c:\\WINDOWS\\clock.avi",
+  "file:///c|/WINDOWS/clock.avi": "c:\\WINDOWS\\clock.avi",
+  "file://localhost/c:/WINDOWS/clock.avi": "c:\\WINDOWS\\clock.avi",
+  "file://hostname/path/to/the%20file.txt": "\\\\hostname\\path\\to\\the file.txt",
+  "file:///c:/path/to/the%20file.txt": "c:\\path\\to\\the file.txt",
+  "file:///C:/Documents%20and%20Settings/davris/FileSchemeURIs.doc": "C:\\Documents and Settings\\davris\\FileSchemeURIs.doc",
+  "file:///C:/caf%C3%A9/%C3%A5r/d%C3%BCnn/%E7%89%9B%E9%93%83/Ph%E1%BB%9F/%F0%9F%98%B5.exe": "C:\\café\\år\\dünn\\牛铃\\Phở\\😵.exe"
+}