Revert "🐛 fix: Update baichuan param (lobehub#3356)"

This reverts commit 29bced1.

src/libs/agent-runtime/baichuan/index.ts

@@ -7,15 +7,22 @@ export const LobeBaichuanAI = LobeOpenAICompatibleFactory({
   baseURL: 'https://api.baichuan-ai.com/v1',
   chatCompletion: {
     handlePayload: (payload: ChatStreamPayload) => {
-      const { temperature, ...rest } = payload;
+      const { frequency_penalty, ...rest } = payload;
 
-      return { 
-        ...rest, 
-        temperature: 
-          temperature !== undefined 
-          ? temperature / 2
-          : undefined,
-      } as OpenAI.ChatCompletionCreateParamsStreaming;
+      let adjustedFrequencyPenalty = frequency_penalty ?? 1;
+
+      if (frequency_penalty !== undefined) {
+        if (frequency_penalty < 1) {
+          // If less than 1 (including negative values), add 1 to bring it into the 1-2 range
+          adjustedFrequencyPenalty = Math.min(Math.max(frequency_penalty + 1, 1), 2);
+        } else if (frequency_penalty > 2) {
+          // If greater than 2, cap it at 2
+          adjustedFrequencyPenalty = 2;
+        }
+        // If between 1 and 2, keep the original value
+      }
+
+      return { ...rest, frequency_penalty: adjustedFrequencyPenalty } as OpenAI.ChatCompletionCreateParamsStreaming;
     },
   },
   debug: {