Handle search error state and cancel wasted API call on filter reset

- Set backendFilteredLogs to empty response on performSearch error so the
  UI shows "0 results" instead of appearing stuck in a loading state
- Cancel debounced search on filter reset instead of firing a request
  whose result would be ignored (hasBackendFilters is false after reset)
- Clear backendFilteredLogs immediately on filter change to prevent
  stale results from previous filter showing during debounce window
- Normalize response.data with nullish coalescing to handle missing data
- Use `not team_object.models` for None-safe emptiness check

litellm/proxy/proxy_server.py

@@ -9215,7 +9215,7 @@ def _add_team_models_to_all_models(
 
     for team_object in team_db_objects_typed:
         if (
-            len(team_object.models) == 0  # empty list = all model access
+            not team_object.models  # None or empty list = all model access
             or SpecialModelNames.all_proxy_models.value in team_object.models
         ):
             model_list = llm_router.get_model_list()

ui/litellm-dashboard/src/components/view_logs/log_filter_logic.tsx

@@ -107,11 +107,21 @@ export function useLogFilterLogic({
           },
         });
 
-        if (currentTimestamp === lastSearchTimestamp.current && response.data) {
-          setBackendFilteredLogs(response);
+        if (currentTimestamp === lastSearchTimestamp.current) {
+          setBackendFilteredLogs({
+            ...response,
+            data: response.data ?? [],
+          });
         }
       } catch (error) {
         console.error("Error searching users:", error);
+        setBackendFilteredLogs({
+          data: [],
+          total: 0,
+          page: 1,
+          page_size: pageSize,
+          total_pages: 0,
+        });
       }
     },
     [accessToken, startTime, endTime, isCustomDate, pageSize, sortBy, sortOrder],
@@ -267,6 +277,7 @@ export function useLogFilterLogic({
       // Only call debouncedSearch if filters have actually changed
       if (JSON.stringify(updatedFilters) !== JSON.stringify(prev)) {
         setCurrentPage(1);
+        setBackendFilteredLogs(null);
         debouncedSearch(updatedFilters, 1);
       }
 
@@ -281,8 +292,8 @@ export function useLogFilterLogic({
     // Clear backend filtered logs to ensure fresh render
     setBackendFilteredLogs(null);
 
-    // Reset selections
-    debouncedSearch(defaultFilters, 1);
+    // Cancel any in-flight debounced search
+    debouncedSearch.cancel();
   };
 
   return {