初始提交：姜十三论坛 Jiang13 Forum

轻量自用论坛，Go 单二进制 + React SPA 内嵌 + SQLite。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/lib/notify.ts

@@ -0,0 +1,8 @@
+import { toast } from 'sonner';
+
+/** 统一 Toast 入口，替代 Arco Message */
+export const notify = {
+  success: (message: string) => toast.success(message),
+  error: (message: string) => toast.error(message),
+  warning: (message: string) => toast.warning(message),
+};