fix: keep previous run checkbox visible and fall back to main worker

src/pages/llmodels/components/view-logs-modal.tsx

@@ -131,16 +131,34 @@ const ViewLogsModal: React.FC<ViewModalProps> = (props) => {
   };
 
   const showCascader =
-    countOptions?.some((option) => option.children!?.length >= 2) ||
+    countOptions?.some((option) => option.children?.length >= 2) ||
     countOptions?.length > 1;
 
   const handleOnChecked = (e: any) => {
     const checked = e.target.checked;
-    const selectItem = currentWorkerCountList.find(
-      (item) => item.previous === checked
-    );
     setShowPrevious(checked);
-    handleOnChange(selectItem);
+
+    if (checked) {
+      const currentPrev = currentWorkerCountList.find((item) => item.previous);
+      if (currentPrev) {
+        handleOnChange(currentPrev);
+        return;
+      }
+      const mainOptionWithPrev = countOptions?.find(
+        (option) =>
+          option.isMain && option.children?.some((child) => child.previous)
+      );
+      const prevChild = mainOptionWithPrev?.children?.find(
+        (child) => child.previous
+      );
+      if (prevChild) {
+        handleOnChange(prevChild);
+      }
+      return;
+    }
+
+    const currentItem = currentWorkerCountList.find((item) => !item.previous);
+    handleOnChange(currentItem);
   };
 
   const optionRender = (option: any) => {
@@ -177,7 +195,6 @@ const ViewLogsModal: React.FC<ViewModalProps> = (props) => {
                 marginRight: 8
               }}
             >
-              {currentWorkerCountList.length > 1 && (
               <Checkbox onChange={handleOnChecked} checked={showPrevious}>
                 <Tooltip
                   title={
@@ -202,7 +219,6 @@ const ViewLogsModal: React.FC<ViewModalProps> = (props) => {
                   <QuestionCircleOutlined style={{ marginLeft: 4 }} />
                 </Tooltip>
               </Checkbox>
-              )}
               <BaseSelect
                 prefix={
                   <span