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/express-validator/lib/context-items/custom-validation.js

@@ -0,0 +1,34 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.CustomValidation = void 0;
+class CustomValidation {
+    constructor(validator, negated) {
+        this.validator = validator;
+        this.negated = negated;
+    }
+    async run(context, value, meta) {
+        try {
+            const result = this.validator(value, meta);
+            const actualResult = await result;
+            const isPromise = result?.then;
+            const failed = this.negated ? actualResult : !actualResult;
+            // A promise that was resolved only adds an error if negated.
+            // Otherwise it always succeeds
+            if ((!isPromise && failed) || (isPromise && this.negated)) {
+                context.addError({ type: 'field', message: this.message, value, meta });
+            }
+        }
+        catch (err) {
+            if (this.negated) {
+                return;
+            }
+            context.addError({
+                type: 'field',
+                message: this.message || (err instanceof Error ? err.message : err),
+                value,
+                meta,
+            });
+        }
+    }
+}
+exports.CustomValidation = CustomValidation;