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-base64/dist-es/fromBase64.browser.js

@@ -0,0 +1,36 @@
+import { alphabetByEncoding, bitsPerByte, bitsPerLetter } from "./constants.browser";
+export const fromBase64 = (input) => {
+    let totalByteLength = (input.length / 4) * 3;
+    if (input.slice(-2) === "==") {
+        totalByteLength -= 2;
+    }
+    else if (input.slice(-1) === "=") {
+        totalByteLength--;
+    }
+    const out = new ArrayBuffer(totalByteLength);
+    const dataView = new DataView(out);
+    for (let i = 0; i < input.length; i += 4) {
+        let bits = 0;
+        let bitLength = 0;
+        for (let j = i, limit = i + 3; j <= limit; j++) {
+            if (input[j] !== "=") {
+                if (!(input[j] in alphabetByEncoding)) {
+                    throw new TypeError(`Invalid character ${input[j]} in base64 string.`);
+                }
+                bits |= alphabetByEncoding[input[j]] << ((limit - j) * bitsPerLetter);
+                bitLength += bitsPerLetter;
+            }
+            else {
+                bits >>= bitsPerLetter;
+            }
+        }
+        const chunkOffset = (i / 4) * 3;
+        bits >>= bitLength % bitsPerByte;
+        const byteLength = Math.floor(bitLength / bitsPerByte);
+        for (let k = 0; k < byteLength; k++) {
+            const offset = (byteLength - k - 1) * bitsPerByte;
+            dataView.setUint8(chunkOffset + k, (bits & (255 << offset)) >> offset);
+        }
+    }
+    return new Uint8Array(out);
+};