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/svg-captcha/README.md

@@ -0,0 +1,123 @@
+![svg-captcha](media/header.png)
+
+<div align="center">
+
+[![Build Status](https://img.shields.io/travis/lemonce/svg-captcha/master.svg?style=flat-square)](https://travis-ci.org/lemonce/svg-captcha)
+[![NPM Version](https://img.shields.io/npm/v/svg-captcha.svg?style=flat-square)](https://www.npmjs.com/package/svg-captcha)
+[![NPM Downloads](https://img.shields.io/npm/dm/svg-captcha.svg?style=flat-square)](https://www.npmjs.com/package/svg-captcha)
+
+</div>
+
+> generate svg captcha in node.js
+
+## Translations
+[中文](README_CN.md)
+
+## useful if you
+
+- cannot or do not want to use google recaptcha
+- have issue with install c++ addon
+
+## install
+```
+npm install --save svg-captcha
+```
+
+## usage
+```Javascript
+var svgCaptcha = require('svg-captcha');
+
+var captcha = svgCaptcha.create();
+console.log(captcha);
+// {data: '<svg.../svg>', text: 'abcd'}
+```
+with express
+```Javascript
+var svgCaptcha = require('svg-captcha');
+
+app.get('/captcha', function (req, res) {
+	var captcha = svgCaptcha.create();
+	req.session.captcha = captcha.text;
+	
+	res.type('svg');
+	res.status(200).send(captcha.data);
+});
+```
+
+## API
+
+#### `svgCaptcha.create(options)`  
+If no option is passed, you will get a random string of four characters and corresponding svg.  
+  
+* `size`: 4 // size of random string  
+* `ignoreChars`: '0o1i' // filter out some characters like 0o1i  
+* `noise`: 1 // number of noise lines  
+* `color`: true // characters will have distinct colors instead of grey, true if background option is set  
+* `background`: '#cc9966' // background color of the svg image  
+
+This function returns an object that has the following property:
+* `data`: string // svg path data
+* `text`: string // captcha text
+
+#### `svgCaptcha.createMathExpr(options)`  
+Similar to create api, you have the above options plus 3 additional:
+* `mathMin`: 1 // the minimum value the math expression can be
+* `mathMax`: 9 // the maximum value the math expression can be
+* `mathOperator`: + // The operator to use, `+`, `-` or `+-` (for random `+` or `-`)
+
+This function returns an object that has the following property:
+* `data`: string // svg of the math expression
+* `text`: string // the answer of the math expression
+
+#### `svgCaptcha.loadFont(url)`
+Load your own font and override the default font.
+* `url`: string // path to your font
+This api is a wrapper around loadFont api of opentype.js.  
+Your may need experiment around various options to make your own font accessible.  
+See the following api.
+
+#### `svgCaptcha.options`
+Gain access to global setting object. 
+It is used for create and createMathExpr api as the default options.  
+  
+In addition to size, noise, color, and background, you can also set the following property:
+* `width`: number // width of captcha
+* `height`: number // height of captcha
+* `fontSize`: number // captcha text size
+* `charPreset`: string // random character preset
+
+#### `svgCaptcha.randomText([size|options])`  
+return a random string.
+#### `svgCaptcha(text, options)`
+return a svg captcha based on text provided.  
+
+In pre 1.1.0 version you have to call these two functions,  
+now you can call create() to save some key strokes ;).
+
+## sample image
+default captcha image:
+
+![image](media/example.png)
+
+math expression image with color options:
+
+![image2](media/example-2.png)
+
+## why use svg?
+
+It does not require any c++ addon.  
+The result image is smaller than jpeg image.
+
+> This has to be a joke. /\<text.+\>;.+\<\/text\>/g.test...
+
+svg captcha uses opentype.js underneath, which means that there is no
+'&lt;text&gt;1234&lt;/text&gt;'.  
+You get
+'&lt;path fill="#444" d="M104.83 19.74L107.85 19.74L112 33.56L116.13 19.74L119.15 19.74L113.48 36.85...'  
+instead.  
+  
+Even though you can write a program that convert svg to png, svg captcha has done its job  
+—— make captcha recognition harder
+
+## License
+[MIT](LICENSE.md)