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/github-from-package/test/url.js

@@ -0,0 +1,19 @@
+var test = require('tape');
+var github = require('../');
+var packages = {
+    a : require('./a.json'),
+    b : require('./b.json'),
+    c : require('./c.json'),
+    d : require('./d.json'),
+    e : require('./e.json')
+};
+
+test(function (t) {
+    t.plan(5);
+    var url = 'https://github.com/substack/beep-boop';
+    t.equal(url, github(packages.a), 'a.json comparison');
+    t.equal(url, github(packages.b), 'b.json comparison');
+    t.equal(url, github(packages.c), 'c.json comparison');
+    t.equal(url, github(packages.d), 'd.json comparison');
+    t.equal(url, github(packages.e), 'e.json comparison');
+});