refactor(common-config): extract snippet from editor content instead of active provider

- Change extraction source from current active provider to editor's live content
- Add i18n support for JSON parse error messages via invalid_json_format_error()
- Simplify API by removing unused providerId parameter
- Update button labels and error messages in zh/en/ja locales

src/components/providers/forms/CommonConfigEditor.tsx

@@ -129,7 +129,7 @@ export function CommonConfigEditor({
                   <Download className="w-4 h-4" />
                 )}
                 {t("claudeConfig.extractFromCurrent", {
-                  defaultValue: "从当前供应商提取",
+                  defaultValue: "从编辑内容提取",
                 })}
               </Button>
             )}