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/@aws-sdk/s3-request-presigner/dist-es/presigner.js

@@ -0,0 +1,58 @@
+import { SignatureV4MultiRegion } from "@aws-sdk/signature-v4-multi-region";
+import { SHA256_HEADER, UNSIGNED_PAYLOAD } from "./constants";
+export class S3RequestPresigner {
+    signer;
+    constructor(options) {
+        const resolvedOptions = {
+            service: options.signingName || options.service || "s3",
+            uriEscapePath: options.uriEscapePath || false,
+            applyChecksum: options.applyChecksum || false,
+            ...options,
+        };
+        this.signer = new SignatureV4MultiRegion(resolvedOptions);
+    }
+    presign(requestToSign, { unsignableHeaders = new Set(), hoistableHeaders = new Set(), unhoistableHeaders = new Set(), ...options } = {}) {
+        this.prepareRequest(requestToSign, {
+            unsignableHeaders,
+            unhoistableHeaders,
+            hoistableHeaders,
+        });
+        return this.signer.presign(requestToSign, {
+            expiresIn: 900,
+            unsignableHeaders,
+            unhoistableHeaders,
+            ...options,
+        });
+    }
+    presignWithCredentials(requestToSign, credentials, { unsignableHeaders = new Set(), hoistableHeaders = new Set(), unhoistableHeaders = new Set(), ...options } = {}) {
+        this.prepareRequest(requestToSign, {
+            unsignableHeaders,
+            unhoistableHeaders,
+            hoistableHeaders,
+        });
+        return this.signer.presignWithCredentials(requestToSign, credentials, {
+            expiresIn: 900,
+            unsignableHeaders,
+            unhoistableHeaders,
+            ...options,
+        });
+    }
+    prepareRequest(requestToSign, { unsignableHeaders = new Set(), unhoistableHeaders = new Set(), hoistableHeaders = new Set(), } = {}) {
+        unsignableHeaders.add("content-type");
+        Object.keys(requestToSign.headers)
+            .map((header) => header.toLowerCase())
+            .filter((header) => header.startsWith("x-amz-server-side-encryption"))
+            .forEach((header) => {
+            if (!hoistableHeaders.has(header)) {
+                unhoistableHeaders.add(header);
+            }
+        });
+        requestToSign.headers[SHA256_HEADER] = UNSIGNED_PAYLOAD;
+        const currentHostHeader = requestToSign.headers.host;
+        const port = requestToSign.port;
+        const expectedHostHeader = `${requestToSign.hostname}${requestToSign.port != null ? ":" + port : ""}`;
+        if (!currentHostHeader || (currentHostHeader === requestToSign.hostname && requestToSign.port != null)) {
+            requestToSign.headers.host = expectedHostHeader;
+        }
+    }
+}