新增奖励兑换模式与奖励设置，并持久化兑换记录

src-tauri/src/commands/mod.rs

@@ -8,6 +8,7 @@ pub mod filesystem;
 pub mod http_server;
 pub mod log;
 pub mod reason;
+pub mod reward;
 pub mod response;
 pub mod settings;
 pub mod settlement;
@@ -26,6 +27,7 @@ pub use filesystem::*;
 pub use http_server::*;
 pub use log::*;
 pub use reason::*;
+pub use reward::*;
 pub use response::*;
 pub use settings::*;
 pub use settlement::*;