fix: add supportsReasoning to LiteLLM proto serialization

The model ID key fix alone wasn't sufficient - supportsReasoning was
being lost during the proto serialization cycle when saving/loading
model info. This adds the field to all relevant conversion functions.

.changeset/litellm-thinking-fix.md

@@ -0,0 +1,5 @@
+---
+"claude-dev": patch
+---
+
+Fix LiteLLM thinking configuration not showing for models (#8342)

proto/cline/models.proto

@@ -484,6 +484,7 @@ message LiteLLMModelInfo {
   repeated ModelTier tiers = 12;
   optional double temperature = 13;
   optional ApiFormat api_format = 14;
+  optional bool supports_reasoning = 15;
 }
 
 // Main ApiConfiguration message

src/core/controller/models/refreshLiteLlmModels.ts

@@ -52,7 +52,10 @@ export async function refreshLiteLlmModels(): Promise<Record<string, ModelInfo>>
 					description: undefined,
 				}
 
-				models[rawModel.model_name] = modelInfo
+				// Use litellm_params.model as the key since that's the actual model ID users select
+				// model_name may not include the region prefix (e.g., "us." for Bedrock models)
+				const modelId = rawModel.litellm_params?.model || rawModel.model_name
+				models[modelId] = modelInfo
 			}
 		}
 	} catch (error) {

src/shared/proto-conversions/models/api-configuration-conversion.ts

@@ -160,6 +160,7 @@ function convertLiteLLMModelInfoToProto(info: AppLiteLLMModelInfo | undefined):
 		description: info.description,
 		tiers: info.tiers || [],
 		temperature: info.temperature,
+		supportsReasoning: info.supportsReasoning,
 	}
 }
 
@@ -183,6 +184,7 @@ function convertProtoToLiteLLMModelInfo(info: LiteLLMModelInfo | undefined): App
 		description: info.description,
 		tiers: info.tiers.length > 0 ? info.tiers : undefined,
 		temperature: info.temperature,
+		supportsReasoning: info.supportsReasoning,
 	}
 }
 

src/shared/proto-conversions/models/typeConversion.ts

@@ -112,6 +112,7 @@ export function fromProtobufLiteLLMModelInfo(protoInfo: ProtoLiteLLMModelInfo):
 		contextWindow: protoInfo.contextWindow,
 		supportsImages: protoInfo.supportsImages,
 		supportsPromptCache: protoInfo.supportsPromptCache,
+		supportsReasoning: protoInfo.supportsReasoning,
 		inputPrice: protoInfo.inputPrice,
 		outputPrice: protoInfo.outputPrice,
 		cacheWritesPrice: protoInfo.cacheWritesPrice,