fix: update frontend API calls to use relative paths for production

frontend/src/components/Form.jsx

@@ -31,7 +31,7 @@ export default function Form({ setResult, setLoading }) {
     e.preventDefault();
     setLoading(true);
     try {
-      const response = await axios.post('http://localhost:8000/api/predict', formData);
+      const response = await axios.post('/api/predict', formData);
       setResult(response.data);
     } catch (error) {
       console.error("Prediction error", error);

frontend/src/components/Sidebar.jsx

@@ -9,7 +9,7 @@ export default function Sidebar({ onSelectResult, onNewAssessment }) {
   const fetchHistory = async () => {
     try {
       setLoading(true);
-      const res = await axios.get('http://localhost:8000/api/history?limit=20');
+      const res = await axios.get('/api/history?limit=20');
       setHistory(res.data);
     } catch (error) {
       console.error("Failed to load history", error);
@@ -21,7 +21,7 @@ export default function Sidebar({ onSelectResult, onNewAssessment }) {
   const handleClearHistory = async () => {
     if (window.confirm("Are you sure you want to clear all history? This action cannot be undone.")) {
       try {
-        await axios.delete('http://localhost:8000/api/history');
+        await axios.delete('/api/history');
         setHistory([]);
       } catch (error) {
         console.error("Failed to clear history", error);