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/@smithy/util-utf8/dist-cjs/index.js

@@ -0,0 +1,32 @@
+'use strict';
+
+var utilBufferFrom = require('@smithy/util-buffer-from');
+
+const fromUtf8 = (input) => {
+    const buf = utilBufferFrom.fromString(input, "utf8");
+    return new Uint8Array(buf.buffer, buf.byteOffset, buf.byteLength / Uint8Array.BYTES_PER_ELEMENT);
+};
+
+const toUint8Array = (data) => {
+    if (typeof data === "string") {
+        return fromUtf8(data);
+    }
+    if (ArrayBuffer.isView(data)) {
+        return new Uint8Array(data.buffer, data.byteOffset, data.byteLength / Uint8Array.BYTES_PER_ELEMENT);
+    }
+    return new Uint8Array(data);
+};
+
+const toUtf8 = (input) => {
+    if (typeof input === "string") {
+        return input;
+    }
+    if (typeof input !== "object" || typeof input.byteOffset !== "number" || typeof input.byteLength !== "number") {
+        throw new Error("@smithy/util-utf8: toUtf8 encoder function only accepts string | Uint8Array.");
+    }
+    return utilBufferFrom.fromArrayBuffer(input.buffer, input.byteOffset, input.byteLength).toString("utf8");
+};
+
+exports.fromUtf8 = fromUtf8;
+exports.toUint8Array = toUint8Array;
+exports.toUtf8 = toUtf8;