refactor: centralize API client and config caching

src/core/api-client.js

@@ -0,0 +1,62 @@
+// API 客户端：负责规范化基础地址、构造完整 URL、发送请求并回传版本信息
+export class ApiClient {
+    constructor({ apiBase = '', managementKey = '', onVersionUpdate = null } = {}) {
+        this.apiBase = '';
+        this.apiUrl = '';
+        this.managementKey = managementKey || '';
+        this.onVersionUpdate = onVersionUpdate;
+        this.setApiBase(apiBase);
+    }
+
+    normalizeBase(input) {
+        let base = (input || '').trim();
+        if (!base) return '';
+        base = base.replace(/\/?v0\/management\/?$/i, '');
+        base = base.replace(/\/+$/i, '');
+        if (!/^https?:\/\//i.test(base)) {
+            base = 'http://' + base;
+        }
+        return base;
+    }
+
+    computeApiUrl(base) {
+        const normalized = this.normalizeBase(base);
+        if (!normalized) return '';
+        return normalized.replace(/\/$/, '') + '/v0/management';
+    }
+
+    setApiBase(newBase) {
+        this.apiBase = this.normalizeBase(newBase);
+        this.apiUrl = this.computeApiUrl(this.apiBase);
+        return this.apiUrl;
+    }
+
+    setManagementKey(key) {
+        this.managementKey = key || '';
+    }
+
+    async request(endpoint, options = {}) {
+        const url = `${this.apiUrl}${endpoint}`;
+        const headers = {
+            'Authorization': `Bearer ${this.managementKey}`,
+            'Content-Type': 'application/json',
+            ...options.headers
+        };
+
+        const response = await fetch(url, {
+            ...options,
+            headers
+        });
+
+        if (typeof this.onVersionUpdate === 'function') {
+            this.onVersionUpdate(response.headers);
+        }
+
+        if (!response.ok) {
+            const errorData = await response.json().catch(() => ({}));
+            throw new Error(errorData.error || `HTTP ${response.status}`);
+        }
+
+        return await response.json();
+    }
+}