fix(ops): 优化错误日志查询和详情展示

- 新增 GetErrorLogByID 接口用于获取单个错误日志详情
- 优化 GetErrorLogs 过滤逻辑，简化参数处理
- 简化前端错误详情模态框代码，提升可维护性
- 更新相关 API 接口和 i18n 翻译

backend/internal/repository/ops_repo.go

@@ -1008,6 +1008,16 @@ func buildOpsErrorLogsWhere(filter *service.OpsErrorLogFilter) (string, []any) {
 		args = append(args, pq.Array(known))
 		clauses = append(clauses, "NOT (COALESCE(upstream_status_code, status_code, 0) = ANY($"+itoa(len(args))+"))")
 	}
+	// Exact correlation keys (preferred for request↔upstream linkage).
+	if rid := strings.TrimSpace(filter.RequestID); rid != "" {
+		args = append(args, rid)
+		clauses = append(clauses, "COALESCE(request_id,'') = $"+itoa(len(args)))
+	}
+	if crid := strings.TrimSpace(filter.ClientRequestID); crid != "" {
+		args = append(args, crid)
+		clauses = append(clauses, "COALESCE(client_request_id,'') = $"+itoa(len(args)))
+	}
+
 	if q := strings.TrimSpace(filter.Query); q != "" {
 		like := "%" + q + "%"
 		args = append(args, like)