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/theme/config.ts

@@ -0,0 +1,10 @@
+import type {ThemeConfig} from "./types"
+
+/**
+ * 主题系统配置
+ * 定义主题文件的存储位置和 localStorage 键名
+ */
+export const THEME_CONFIG: ThemeConfig = {
+  styleDir: "public/style",
+  storageKey: "app-theme-id",
+}