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-endpoints/dist-es/cache/EndpointCache.js

@@ -0,0 +1,50 @@
+export class EndpointCache {
+    capacity;
+    data = new Map();
+    parameters = [];
+    constructor({ size, params }) {
+        this.capacity = size ?? 50;
+        if (params) {
+            this.parameters = params;
+        }
+    }
+    get(endpointParams, resolver) {
+        const key = this.hash(endpointParams);
+        if (key === false) {
+            return resolver();
+        }
+        if (!this.data.has(key)) {
+            if (this.data.size > this.capacity + 10) {
+                const keys = this.data.keys();
+                let i = 0;
+                while (true) {
+                    const { value, done } = keys.next();
+                    this.data.delete(value);
+                    if (done || ++i > 10) {
+                        break;
+                    }
+                }
+            }
+            this.data.set(key, resolver());
+        }
+        return this.data.get(key);
+    }
+    size() {
+        return this.data.size;
+    }
+    hash(endpointParams) {
+        let buffer = "";
+        const { parameters } = this;
+        if (parameters.length === 0) {
+            return false;
+        }
+        for (const param of parameters) {
+            const val = String(endpointParams[param] ?? "");
+            if (val.includes("|;")) {
+                return false;
+            }
+            buffer += val + "|;";
+        }
+        return buffer;
+    }
+}