Merge pull request #441 from huynguyen03dev/fix/claude-to-openai-whitespace-text

fix: filter whitespace-only text in Claude to OpenAI translation

internal/translator/openai/claude/openai_claude_request.go

@@ -8,6 +8,7 @@ package claude
 import (
 	"bytes"
 	"encoding/json"
+	"strings"
 
 	"github.com/tidwall/gjson"
 	"github.com/tidwall/sjson"
@@ -242,11 +243,12 @@ func convertClaudeContentPart(part gjson.Result) (string, bool) {
 
 	switch partType {
 	case "text":
-		if !part.Get("text").Exists() {
+		text := part.Get("text").String()
+		if strings.TrimSpace(text) == "" {
 			return "", false
 		}
 		textContent := `{"type":"text","text":""}`
-		textContent, _ = sjson.Set(textContent, "text", part.Get("text").String())
+		textContent, _ = sjson.Set(textContent, "text", text)
 		return textContent, true
 
 	case "image":