refactor(repo): replace legacy openflare-server with Wavelet rename

Delete the old monolithic openflare-server implementation and rename
Wavelet/ to openflare-server/ to complete the migration consolidation.
Update CI workflows, agent Dockerfiles, and deployment docs for the new
layout (frontend/, docker/Dockerfile).

openflare-server/frontend/lib/services/core/config.ts

@@ -0,0 +1,27 @@
+/**
+ * API 配置
+ */
+
+/**
+ * 获取 API 基础 URL
+ * @returns API 基础 URL
+ */
+export function getApiBaseUrl(): string {
+  if (typeof window === 'undefined') {
+    return process.env.WAVELET_BACKEND_URL || process.env.NEXT_PUBLIC_WAVELET_BACKEND_URL || 'http://localhost:3000';
+  }
+  return process.env.NEXT_PUBLIC_WAVELET_BACKEND_URL || '';
+}
+
+/**
+ * API 配置选项
+ */
+export const apiConfig = {
+  /** Basic URL */
+  baseURL: getApiBaseUrl(),
+  /** 超时时间（毫秒） */
+  timeout: 15000,
+  /** 携带凭证 */
+  withCredentials: true,
+} as const;
+