update environment variables

phd-advisor-frontend/src/components/ExportButton.js

@@ -63,7 +63,7 @@ const ExportButton = ({ hasMessages = false, currentSessionId = null, authToken
       const endpoint = selectedTypeData.endpoint;
       
       // Build the URL with session ID if available
-      let url = `http://localhost:8000/${endpoint}?format=${format}`;
+      let url = `${process.env.REACT_APP_API_URL}/${endpoint}?format=${format}`;
       if (currentSessionId) {
         url += `&chat_session_id=${currentSessionId}`;
       }

phd-advisor-frontend/src/components/FileUpload.js

@@ -44,7 +44,7 @@ const FileUpload = ({ onFileUploaded, isUploading, onUploadStart, currentChatSes
     formData.append('file', file);
 
     try {
-      let uploadUrl = 'http://localhost:8000/upload-document';
+      let uploadUrl = `${process.env.REACT_APP_API_URL}/upload-document`;
       
       console.log('=== DOCUMENT UPLOAD DEBUG ===');
       console.log('currentChatSessionId:', currentChatSessionId);

phd-advisor-frontend/src/components/Login.js

@@ -53,7 +53,7 @@ const Login = ({ onNavigateToSignup, onNavigateToHome }) => {
     setIsLoading(true);
     
     try {
-      const response = await fetch('http://localhost:8000/auth/login', {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/auth/login`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',

phd-advisor-frontend/src/components/Sidebar.js

@@ -73,7 +73,7 @@ const Sidebar = ({
 
   const fetchChatSessions = async () => {
     try {
-      const response = await fetch('http://localhost:8000/api/chat-sessions', {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/api/chat-sessions`, {
         headers: {
           'Authorization': `Bearer ${authToken}`,
           'Content-Type': 'application/json'
@@ -117,7 +117,7 @@ const Sidebar = ({
     
     if (window.confirm('Are you sure you want to delete this chat?')) {
       try {
-        const response = await fetch(`http://localhost:8000/api/chat-sessions/${sessionId}`, {
+        const response = await fetch(`${process.env.REACT_APP_API_URL}/api/chat-sessions/${sessionId}`, {
           method: 'DELETE',
           headers: {
             'Authorization': `Bearer ${authToken}`,

phd-advisor-frontend/src/components/Signup.js

@@ -91,7 +91,7 @@ const Signup = ({ onNavigateToLogin, onNavigateToHome }) => {
     setIsLoading(true);
     
     try {
-      const response = await fetch('http://localhost:8000/auth/signup', {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/auth/signup`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',

phd-advisor-frontend/src/pages/ChatPage.js

@@ -52,7 +52,7 @@ const ChatPage = ({ user, authToken, onNavigateToHome, onSignOut }) => {
 
   const fetchCurrentProvider = async () => {
     try {
-      const response = await fetch('http://localhost:8000/current-provider');
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/current-provider`);
       if (response.ok) {
         const data = await response.json();
         setCurrentProvider(data.current_provider);
@@ -70,7 +70,7 @@ const ChatPage = ({ user, authToken, onNavigateToHome, onSignOut }) => {
 
     setIsProviderSwitching(true);
     try {
-      const response = await fetch('http://localhost:8000/switch-provider', {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/switch-provider`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',
@@ -126,7 +126,7 @@ const ChatPage = ({ user, authToken, onNavigateToHome, onSignOut }) => {
         ? `${firstMessage.substring(0, 30)}...` 
         : `Chat ${new Date().toLocaleDateString()}`;
 
-      const response = await fetch('http://localhost:8000/api/chat-sessions', {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/api/chat-sessions`, {
         method: 'POST',
         headers: {
           'Authorization': `Bearer ${authToken}`,
@@ -161,7 +161,7 @@ const loadChatSession = async (sessionId) => {
   setIsLoadingSession(true);
   try {
     // Use the new switch-chat endpoint that syncs context
-    const response = await fetch('http://localhost:8000/switch-chat', {
+    const response = await fetch(`${process.env.REACT_APP_API_URL}/switch-chat`, {
       method: 'POST',
       headers: {
         'Authorization': `Bearer ${authToken}`,
@@ -190,7 +190,7 @@ const loadChatSession = async (sessionId) => {
         setThinkingAdvisors([]);
         
         // Also get the session title from MongoDB
-        const sessionResponse = await fetch(`http://localhost:8000/api/chat-sessions/${sessionId}`, {
+        const sessionResponse = await fetch(`${process.env.REACT_APP_API_URL}/api/chat-sessions/${sessionId}`, {
           headers: {
             'Authorization': `Bearer ${authToken}`,
             'Content-Type': 'application/json'
@@ -214,7 +214,7 @@ const saveMessageToSession = async (message) => {
   if (!currentSessionId || !authToken) return;
 
   try {
-    await fetch(`http://localhost:8000/api/chat-sessions/${currentSessionId}/messages`, {
+    await fetch(`${process.env.REACT_APP_API_URL}/api/chat-sessions/${currentSessionId}/messages`, {
       method: 'POST',
       headers: {
         'Authorization': `Bearer ${authToken}`,
@@ -238,7 +238,7 @@ const updateSessionTitle = async (sessionId, newTitle) => {
   if (!sessionId || !authToken) return;
 
   try {
-    await fetch(`http://localhost:8000/api/chat-sessions/${sessionId}`, {
+    await fetch(`${process.env.REACT_APP_API_URL}/api/chat-sessions/${sessionId}`, {
       method: 'PUT',
       headers: {
         'Authorization': `Bearer ${authToken}`,
@@ -268,7 +268,7 @@ const handleNewChat = async (sessionId = null) => {
     // Creating completely new chat with fresh context
     try {
       // Step 1: Reset memory session
-      const response = await fetch('http://localhost:8000/new-chat', {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/new-chat`, {
         method: 'POST',
         headers: {
           'Authorization': `Bearer ${authToken}`,
@@ -402,7 +402,7 @@ const handleNewChat = async (sessionId = null) => {
 
       console.log('Sending message with session ID:', currentSessionId); // Debug log
 
-      const response = await fetch('http://localhost:8000/chat-sequential', {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/chat-sequential`, {
         method: 'POST',
         headers: headers,
         body: JSON.stringify({
@@ -491,7 +491,7 @@ const handleNewChat = async (sessionId = null) => {
   setThinkingAdvisors([replyContext.persona_id]);
 
   try {
-    const response = await fetch('http://localhost:8000/reply-to-advisor', {
+    const response = await fetch(`${process.env.REACT_APP_API_URL}/reply-to-advisor`, {
       method: 'POST',
       headers: {
         'Content-Type': 'application/json',
@@ -575,7 +575,7 @@ const handleNewChat = async (sessionId = null) => {
     setThinkingAdvisors([advisorId]);
 
     try {
-      const response = await fetch(`http://localhost:8000/chat/${advisorId}`, {
+      const response = await fetch(`${process.env.REACT_APP_API_URL}/chat/${advisorId}`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json',