refactor: update API with DexParamEnum and simplify TradeConfig

- Introduce DexParamEnum to replace Dex enum for protocol parameters
- Simplify TradeConfig::new() to accept only 3 essential parameters
- Update all examples to use new DexParamEnum API
- Optimize executor and params modules
- Remove deprecated wsol_use_seed and mint_use_seed parameters
- Fix fast_fn module exports

src/trading/core/traits.rs

@@ -5,7 +5,11 @@ use solana_sdk::{instruction::Instruction, signature::Signature};
 /// 交易执行器trait - 定义了所有交易协议都需要实现的核心方法
 #[async_trait::async_trait]
 pub trait TradeExecutor: Send + Sync {
-    async fn swap(&self, params: SwapParams) -> Result<(bool, Signature, Option<anyhow::Error>)>;
+    /// 🔧 修复：返回Vec<Signature>支持多SWQOS并发交易
+    /// - bool: 是否至少有一个交易成功
+    /// - Vec<Signature>: 所有提交的交易签名（按SWQOS顺序）
+    /// - Option<anyhow::Error>: 最后一个错误（如果全部失败）
+    async fn swap(&self, params: SwapParams) -> Result<(bool, Vec<Signature>, Option<anyhow::Error>)>;
     /// 获取协议名称
     fn protocol_name(&self) -> &'static str;
 }
@@ -19,18 +23,3 @@ pub trait InstructionBuilder: Send + Sync {
     /// 构建卖出指令
     async fn build_sell_instructions(&self, params: &SwapParams) -> Result<Vec<Instruction>>;
 }
-
-/// 协议特定参数trait - 允许每个协议定义自己的参数
-pub trait ProtocolParams: Send + Sync {
-    /// 将参数转换为Any以便向下转型
-    fn as_any(&self) -> &dyn std::any::Any;
-
-    /// 克隆参数
-    fn clone_box(&self) -> Box<dyn ProtocolParams>;
-}
-
-impl Clone for Box<dyn ProtocolParams> {
-    fn clone(&self) -> Self {
-        self.clone_box()
-    }
-}