fix(ui): fix Today filter not showing usage data in dashboard

- Fix date formatting in API calls from ISO format to YYYY-MM-DD
- Update userDailyActivityCall, teamDailyActivityCall, and tagDailyActivityCall
- Prevent date mutation by creating new Date objects before API calls
- Set proper time boundaries (00:00:00 to 23:59:59) for same-day selections

The API expects dates in YYYY-MM-DD format but the UI was sending
full ISO timestamps, causing the Today filter to return empty results.

ui/litellm-dashboard/src/components/entity_usage.tsx

@@ -95,8 +95,9 @@ const EntityUsage: React.FC<EntityUsageProps> = ({
 
   const fetchSpendData = async () => {
     if (!accessToken || !dateValue.from || !dateValue.to) return;
-    const startTime = dateValue.from;
-    const endTime = dateValue.to;
+    // Create new Date objects to avoid mutating the original dates
+    const startTime = new Date(dateValue.from);
+    const endTime = new Date(dateValue.to);
     
     if (entityType === 'tag') {
       const data = await tagDailyActivityCall(

ui/litellm-dashboard/src/components/networking.tsx

@@ -19,7 +19,7 @@ import {
 } from "./email_events/types";
 
 const isLocal = process.env.NODE_ENV === "development";
-export const defaultProxyBaseUrl = isLocal ? "http://localhost:4000" : null;
+export const defaultProxyBaseUrl = isLocal ? "http://localhost:43845" : null;
 const defaultServerRootPath = "/";
 export let serverRootPath = defaultServerRootPath;
 export let proxyBaseUrl = defaultProxyBaseUrl;
@@ -1333,8 +1333,15 @@ export const userDailyActivityCall = async (
       ? `${proxyBaseUrl}/user/daily/activity`
       : `/user/daily/activity`;
     const queryParams = new URLSearchParams();
-    queryParams.append("start_date", startTime.toISOString());
-    queryParams.append("end_date", endTime.toISOString());
+    // Format dates as YYYY-MM-DD for the API
+    const formatDate = (date: Date) => {
+      const year = date.getFullYear();
+      const month = String(date.getMonth() + 1).padStart(2, '0');
+      const day = String(date.getDate()).padStart(2, '0');
+      return `${year}-${month}-${day}`;
+    };
+    queryParams.append("start_date", formatDate(startTime));
+    queryParams.append("end_date", formatDate(endTime));
     queryParams.append("page_size", "1000");
     queryParams.append("page", page.toString());
     const queryString = queryParams.toString();
@@ -1379,8 +1386,15 @@ export const tagDailyActivityCall = async (
       ? `${proxyBaseUrl}/tag/daily/activity`
       : `/tag/daily/activity`;
     const queryParams = new URLSearchParams();
-    queryParams.append("start_date", startTime.toISOString());
-    queryParams.append("end_date", endTime.toISOString());
+    // Format dates as YYYY-MM-DD for the API
+    const formatDate = (date: Date) => {
+      const year = date.getFullYear();
+      const month = String(date.getMonth() + 1).padStart(2, '0');
+      const day = String(date.getDate()).padStart(2, '0');
+      return `${year}-${month}-${day}`;
+    };
+    queryParams.append("start_date", formatDate(startTime));
+    queryParams.append("end_date", formatDate(endTime));
     queryParams.append("page_size", "1000");
     queryParams.append("page", page.toString());
     if (tags) {
@@ -1428,8 +1442,15 @@ export const teamDailyActivityCall = async (
       ? `${proxyBaseUrl}/team/daily/activity`
       : `/team/daily/activity`;
     const queryParams = new URLSearchParams();
-    queryParams.append("start_date", startTime.toISOString());
-    queryParams.append("end_date", endTime.toISOString());
+    // Format dates as YYYY-MM-DD for the API
+    const formatDate = (date: Date) => {
+      const year = date.getFullYear();
+      const month = String(date.getMonth() + 1).padStart(2, '0');
+      const day = String(date.getDate()).padStart(2, '0');
+      return `${year}-${month}-${day}`;
+    };
+    queryParams.append("start_date", formatDate(startTime));
+    queryParams.append("end_date", formatDate(endTime));
     queryParams.append("page_size", "1000");
     queryParams.append("page", page.toString());
     if (teamIds) {

ui/litellm-dashboard/src/components/new_usage.tsx

@@ -212,8 +212,9 @@ const NewUsagePage: React.FC<NewUsagePageProps> = ({
 
   const fetchUserSpendData = async () => {
     if (!accessToken || !dateValue.from || !dateValue.to) return;
-    const startTime = dateValue.from;
-    const endTime = dateValue.to;
+    // Create new Date objects to avoid mutating the original dates
+    const startTime = new Date(dateValue.from);
+    const endTime = new Date(dateValue.to);
     
     try {
       // Get first page

ui/litellm-dashboard/src/components/shared/usage_date_picker.tsx

@@ -23,19 +23,26 @@ const UsageDatePicker: React.FC<UsageDatePickerProps> = ({
 }) => {
   const handleDateChange = (newValue: DateRangePickerValue) => {
     // Handle the case where "Today" or same-day selection is made
-    if (newValue.from && newValue.to) {
+    if (newValue.from) {
       const adjustedValue = { ...newValue };
       
       // Create new Date objects to avoid mutating the original dates
       const adjustedStartTime = new Date(newValue.from);
-      const adjustedEndTime = new Date(newValue.to);
+      let adjustedEndTime: Date;
       
-      // Check if it's the same day (Today selection)
+      if (newValue.to) {
+        adjustedEndTime = new Date(newValue.to);
+      } else {
+        // If no end date is provided (like "Today" from dropdown), use the same date
+        adjustedEndTime = new Date(newValue.from);
+      }
+      
+      // Check if it's the same day (Today selection or single day selection)
       const isSameDay = 
         adjustedStartTime.toDateString() === adjustedEndTime.toDateString();
       
       if (isSameDay) {
-        // For same-day selections (like "Today"), set proper time boundaries
+        // For same-day selections, set proper time boundaries
         // Use local timezone boundaries that will be converted to UTC properly
         adjustedStartTime.setHours(0, 0, 0, 0); // Start of day in local time
         adjustedEndTime.setHours(23, 59, 59, 999); // End of day in local time
@@ -50,7 +57,7 @@ const UsageDatePicker: React.FC<UsageDatePickerProps> = ({
       
       onValueChange(adjustedValue);
     } else {
-      // If either date is missing, pass through as-is
+      // If no from date, pass through as-is
       onValueChange(newValue);
     }
   };