fix(ai-proxy): fix streaming process

plugins/wasm-go/extensions/ai-proxy/main.go

@@ -433,6 +433,10 @@ func onStreamingResponseBody(ctx wrapper.HttpContext, pluginConfig config.Plugin
 		return claudeChunk
 	}
 
+	if !needsClaudeResponseConversion(ctx) {
+		return chunk
+	}
+
 	// If provider doesn't implement any streaming handlers but we need Claude conversion
 	// First extract complete events from the chunk
 	events := provider.ExtractStreamingEvents(ctx, chunk)

plugins/wasm-go/extensions/ai-proxy/provider/provider.go

@@ -825,7 +825,7 @@ func ExtractStreamingEvents(ctx wrapper.HttpContext, chunk []byte) []StreamEvent
 			continue
 		}
 
-		if lineStartIndex != -1 && valueStartIndex != -1 {
+		if lineStartIndex != -1 {
 			value := string(body[valueStartIndex:i])
 			currentEvent.SetValue(currentKey, value)
 		} else {