fix: clamp max_tokens and inference parameters to valid Gradio slider ranges

main.go

@@ -414,7 +414,7 @@ func ResolveMaxTokens(req ChatCompletionRequest) int {
     mt = req.MaxCompletionTokens
   }
   if mt <= 0 {
-    mt = 8192
+    mt = 4096
   }
   if mt > 32768 {
     mt = 32768
@@ -1633,11 +1633,29 @@ func (s *QwenService) chatGradioRespond(endpointURL string, w http.ResponseWrite
   if req.Temperature != nil {
     tempVal = *req.Temperature
   }
+  if tempVal < 0.0 {
+    tempVal = 0.0
+  } else if tempVal > 2.0 {
+    tempVal = 2.0
+  }
 
   topPVal := 0.95
   if req.TopP != nil {
     topPVal = *req.TopP
   }
+  if topPVal < 0.0 {
+    topPVal = 0.0
+  } else if topPVal > 1.0 {
+    topPVal = 1.0
+  }
+
+  // MicroHERO /respond endpoint has a slider with strict range [64, 4096]
+  clampedTokens := maxTokens
+  if clampedTokens > 4096 {
+    clampedTokens = 4096
+  } else if clampedTokens < 64 {
+    clampedTokens = 64
+  }
 
   effUA := EffectiveUserAgent(r)
   effHFToken := EffectiveHFToken(r)
@@ -1650,7 +1668,7 @@ func (s *QwenService) chatGradioRespond(endpointURL string, w http.ResponseWrite
       "text":  promptText,
       "files": []interface{}{},
     },
-    maxTokens,
+    clampedTokens,
     tempVal,
     topPVal,
   }
@@ -1887,6 +1905,11 @@ func (s *QwenService) chatGradioChatResponse(endpointURL string, w http.Response
   } else if !enableThinking {
     tempVal = 0.7
   }
+  if tempVal < 0.0 {
+    tempVal = 0.0
+  } else if tempVal > 2.0 {
+    tempVal = 2.0
+  }
 
   topPVal := 0.95
   if req.TopP != nil {
@@ -1894,12 +1917,30 @@ func (s *QwenService) chatGradioChatResponse(endpointURL string, w http.Response
   } else if !enableThinking {
     topPVal = 0.80
   }
+  if topPVal < 0.1 {
+    topPVal = 0.1
+  } else if topPVal > 1.0 {
+    topPVal = 1.0
+  }
 
   topKVal := 20
   presenceVal := 0.0
   if !enableThinking {
     presenceVal = 1.5
   }
+  if presenceVal < 0.0 {
+    presenceVal = 0.0
+  } else if presenceVal > 2.0 {
+    presenceVal = 2.0
+  }
+
+  // Halvo78 /chat_response slider range is [256, 32768]
+  clampedTokens := maxTokens
+  if clampedTokens > 32768 {
+    clampedTokens = 32768
+  } else if clampedTokens < 256 {
+    clampedTokens = 256
+  }
 
   customAPIKey := EffectiveUpstreamKey(r)
   if customAPIKey == "" {
@@ -1943,7 +1984,7 @@ func (s *QwenService) chatGradioChatResponse(endpointURL string, w http.Response
     topPVal,
     topKVal,
     presenceVal,
-    maxTokens,
+    clampedTokens,
     systemPromptStr,
     customBaseURL,
     customAPIKey,