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/hooks/use-public-config.ts

@@ -0,0 +1,20 @@
+import {useQuery} from '@tanstack/react-query'
+import services from '@/lib/services'
+
+/**
+ * 获取公共配置（使用 React Query 进行统一缓存与自动同步）
+ *
+ * @example
+ * ```tsx
+ * const { config, loading, error } = usePublicConfig()
+ * ```
+ */
+export function usePublicConfig() {
+  const { data: config, isLoading: loading, error } = useQuery({
+    queryKey: ['public-config'],
+    queryFn: () => services.config.getPublicConfig(),
+    staleTime: 5 * 60 * 1000, // 5 分钟缓存
+  })
+
+  return { config: config || null, loading, error }
+}