fix: refresh buttons use "now" as to-date for queries

Instead of calling refetch() with stale time params, the refresh
buttons now set a toOverride state to new Date().toISOString(). This
flows into the query key, triggering a fresh fetch with the current
time as the upper bound. Both useApplicationLogs and useAgentEvents
hooks accept an optional toOverride parameter.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/api/queries/logs.ts

@@ -16,20 +16,21 @@ export interface LogEntryResponse {
 export function useApplicationLogs(
   application?: string,
   agentId?: string,
-  options?: { limit?: number },
+  options?: { limit?: number; toOverride?: string },
 ) {
   const refetchInterval = useRefreshInterval(15_000);
   const { timeRange } = useGlobalFilters();
+  const to = options?.toOverride ?? timeRange.end.toISOString();
 
   return useQuery({
-    queryKey: ['logs', application, agentId, timeRange.start.toISOString(), timeRange.end.toISOString(), options?.limit],
+    queryKey: ['logs', application, agentId, timeRange.start.toISOString(), to, options?.limit],
     queryFn: async () => {
       const token = useAuthStore.getState().accessToken;
       const params = new URLSearchParams();
       params.set('application', application!);
       if (agentId) params.set('agentId', agentId);
       params.set('from', timeRange.start.toISOString());
-      params.set('to', timeRange.end.toISOString());
+      params.set('to', to);
       if (options?.limit) params.set('limit', String(options.limit));
       const res = await fetch(`${config.apiBaseUrl}/logs?${params}`, {
         headers: {