fix(消息重发): 修复重发消息时模型选择逻辑

确保当原始消息模型被提及时才使用该模型，否则使用助手默认模型

src/renderer/src/store/thunk/messageThunk.ts

@@ -1103,7 +1103,14 @@ export const resendMessageThunk =
         const resetMsg = resetAssistantMessage(originalMsg, {
           status: AssistantMessageStatus.PENDING,
           updatedAt: new Date().toISOString(),
-          ...(assistantMessagesToReset.length === 1 ? { model: originalMsg.model ?? assistant.model } : {})
+          ...(assistantMessagesToReset.length === 1
+            ? {
+                model:
+                  originalMsg.model && userMessageToResend.mentions?.includes(originalMsg.model)
+                    ? originalMsg.model
+                    : assistant.model
+              }
+            : {})
         })
 
         resetDataList.push(resetMsg)