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/mkdirp/bin/cmd.js

@@ -0,0 +1,33 @@
+#!/usr/bin/env node
+
+var mkdirp = require('../');
+var minimist = require('minimist');
+var fs = require('fs');
+
+var argv = minimist(process.argv.slice(2), {
+    alias: { m: 'mode', h: 'help' },
+    string: [ 'mode' ]
+});
+if (argv.help) {
+    fs.createReadStream(__dirname + '/usage.txt').pipe(process.stdout);
+    return;
+}
+
+var paths = argv._.slice();
+var mode = argv.mode ? parseInt(argv.mode, 8) : undefined;
+
+(function next () {
+    if (paths.length === 0) return;
+    var p = paths.shift();
+    
+    if (mode === undefined) mkdirp(p, cb)
+    else mkdirp(p, mode, cb)
+    
+    function cb (err) {
+        if (err) {
+            console.error(err.message);
+            process.exit(1);
+        }
+        else next();
+    }
+})();

backend/node_modules/mkdirp/bin/usage.txt

@@ -0,0 +1,12 @@
+usage: mkdirp [DIR1,DIR2..] {OPTIONS}
+
+  Create each supplied directory including any necessary parent directories that
+  don't yet exist.
+  
+  If the directory already exists, do nothing.
+
+OPTIONS are:
+
+  -m, --mode   If a directory needs to be created, set the mode as an octal
+               permission string.
+