fix(api): add error handling for AI SDK errors in Mistral provider

- Add handleAiSdkError to imports from ../transform/ai-sdk
- Wrap stream processing in try/catch block
- Handle AI_RetryError, AI_APICallError, etc. with proper error transformation

Addresses review comment about missing error handling for AI SDK errors.

Author: daniel-lxs

src/api/providers/mistral.ts

@@ -12,7 +12,12 @@ import {
 
 import type { ApiHandlerOptions } from "../../shared/api"
 
-import { convertToAiSdkMessages, convertToolsForAiSdk, processAiSdkStreamPart } from "../transform/ai-sdk"
+import {
+	convertToAiSdkMessages,
+	convertToolsForAiSdk,
+	processAiSdkStreamPart,
+	handleAiSdkError,
+} from "../transform/ai-sdk"
 import { ApiStream, ApiStreamUsageChunk } from "../transform/stream"
 import { getModelParams } from "../transform/model-params"
 
@@ -158,17 +163,22 @@ export class MistralHandler extends BaseProvider implements SingleCompletionHand
 		// Use streamText for streaming responses
 		const result = streamText(requestOptions)
 
-		// Process the full stream to get all events including reasoning
-		for await (const part of result.fullStream) {
-			for (const chunk of processAiSdkStreamPart(part)) {
-				yield chunk
+		try {
+			// Process the full stream to get all events including reasoning
+			for await (const part of result.fullStream) {
+				for (const chunk of processAiSdkStreamPart(part)) {
+					yield chunk
+				}
 			}
-		}
 
-		// Yield usage metrics at the end
-		const usage = await result.usage
-		if (usage) {
-			yield this.processUsageMetrics(usage)
+			// Yield usage metrics at the end
+			const usage = await result.usage
+			if (usage) {
+				yield this.processUsageMetrics(usage)
+			}
+		} catch (error) {
+			// Handle AI SDK errors (AI_RetryError, AI_APICallError, etc.)
+			throw handleAiSdkError(error, "Mistral")
 		}
 	}