feat: Add configuration management for default user roles and permissions

app/api/config/route.ts

@@ -0,0 +1,21 @@
+import { Role, ROLES } from "@/lib/permissions"
+import { getRequestContext } from "@cloudflare/next-on-pages"
+
+export const runtime = "edge"
+
+export async function GET() {
+  const config = await getRequestContext().env.SITE_CONFIG.get("DEFAULT_ROLE")
+
+  return Response.json({ defaultRole: config || ROLES.CIVILIAN })
+}
+
+export async function POST(request: Request) {
+  const { defaultRole } = await request.json() as { defaultRole: Exclude<Role, typeof ROLES.EMPEROR> }
+  
+  if (![ROLES.KNIGHT, ROLES.CIVILIAN].includes(defaultRole)) {
+    return Response.json({ error: "无效的角色" }, { status: 400 })
+  }
+
+  await getRequestContext().env.SITE_CONFIG.put("DEFAULT_ROLE", defaultRole)
+  return Response.json({ success: true })
+}