Fixed: #137

refactor: simplify ConvertCodexResponseToClaudeNonStream by removing bufio.Scanner usage and restructuring response parsing logic

internal/translator/codex/claude/codex_claude_response.go

@@ -7,7 +7,6 @@
 package claude
 
 import (
-	"bufio"
 	"bytes"
 	"context"
 	"encoding/json"
@@ -180,29 +179,16 @@ func ConvertCodexResponseToClaude(_ context.Context, _ string, originalRequestRa
 // Returns:
 //   - string: A Claude Code-compatible JSON response containing all message content and metadata
 func ConvertCodexResponseToClaudeNonStream(_ context.Context, _ string, originalRequestRawJSON, _ []byte, rawJSON []byte, _ *any) string {
-	scanner := bufio.NewScanner(bytes.NewReader(rawJSON))
-	buffer := make([]byte, 20_971_520)
-	scanner.Buffer(buffer, 20_971_520)
 	revNames := buildReverseMapFromClaudeOriginalShortToOriginal(originalRequestRawJSON)
 
-	for scanner.Scan() {
-		line := scanner.Bytes()
-		if !bytes.HasPrefix(line, dataTag) {
-			continue
-		}
-		payload := bytes.TrimSpace(line[len(dataTag):])
-		if len(payload) == 0 {
-			continue
-		}
-
-		rootResult := gjson.ParseBytes(payload)
+	rootResult := gjson.ParseBytes(rawJSON)
 	if rootResult.Get("type").String() != "response.completed" {
-			continue
+		return ""
 	}
 
 	responseData := rootResult.Get("response")
 	if !responseData.Exists() {
-			continue
+		return ""
 	}
 
 	response := map[string]interface{}{
@@ -345,9 +331,6 @@ func ConvertCodexResponseToClaudeNonStream(_ context.Context, _ string, original
 	return string(responseJSON)
 }
 
-	return ""
-}
-
 // buildReverseMapFromClaudeOriginalShortToOriginal builds a map[short]original from original Claude request tools.
 func buildReverseMapFromClaudeOriginalShortToOriginal(original []byte) map[string]string {
 	tools := gjson.GetBytes(original, "tools")