Update templates/index.html

templates/index.html

@@ -14,7 +14,7 @@
             --background-color: #f8f9fa;
             --text-color: #333;
             --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
-            --code-bg: #2c323c;
+            --code-bg: #2c323c; /* Background for code blocks generated by marked+hljs */
             --output-bg: #f1f8f9;
         }
 
@@ -72,170 +72,101 @@
             margin: 30px 0;
             text-align: left;
         }
+        .feature-list li { padding: 10px 0; margin-bottom: 10px; display: flex; align-items: center; }
+        .feature-list i { color: var(--accent-color); margin-right: 10px; font-size: 1.2rem; }
 
-        .feature-list li {
-            padding: 10px 0;
-            margin-bottom: 10px;
-            display: flex;
-            align-items: center;
-        }
-
-        .feature-list i {
-            color: var(--accent-color);
-            margin-right: 10px;
-            font-size: 1.2rem;
-        }
+        .cta-button { display: inline-block; background-color: var(--primary-color); color: white; padding: 12px 25px; border-radius: 5px; text-decoration: none; font-weight: bold; transition: all 0.3s ease; margin: 20px 10px; border: none; cursor: pointer; }
+        .cta-button:hover { background-color: var(--secondary-color); transform: translateY(-2px); box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15); }
 
-        .cta-button {
-            display: inline-block;
-            background-color: var(--primary-color);
-            color: white;
-            padding: 12px 25px;
-            border-radius: 5px;
-            text-decoration: none;
-            font-weight: bold;
-            transition: all 0.3s ease;
-            margin: 20px 10px;
-            border: none;
-            cursor: pointer;
-        }
+        .upgrade-section { margin-top: 30px; padding: 20px; border-top: 1px solid #ddd; }
+        footer { text-align: center; padding: 20px 0; color: #666; font-size: 0.9rem; }
 
-        .cta-button:hover {
-            background-color: var(--secondary-color);
-            transform: translateY(-2px);
-            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
-        }
-
-        .upgrade-section {
+        /* --- Styles for Solution Area --- */
+        #solutionOutput {
             margin-top: 30px;
-            padding: 20px;
-            border-top: 1px solid #ddd;
-        }
-
-        footer {
-            text-align: center;
-            padding: 20px 0;
-            color: #666;
-            font-size: 0.9rem;
+            text-align: left;
+            display: none;
         }
 
-        #solution {
+        #solutionContainer {
             background: #fff;
-            padding: 0; /* Remove padding from the container */
+            padding: 20px;
             border-radius: 8px;
             text-align: left;
             line-height: 1.8;
             font-size: 16px;
-            overflow: hidden; /* Clip child border-radius */
-            box-shadow: var(--box-shadow); /* Add shadow to the main container */
-        }
-
-        .step-section, .code-section, .output-section {
-            margin: 0; /* Remove vertical margins between blocks */
-            padding: 15px 20px; /* Add padding inside each block, matching original #solution padding */
-            border-radius: 0; /* Remove rounded corners between blocks */
-            border-left: none; /* Remove default left border */
-            overflow-x: auto;
-            white-space: pre-wrap; /* Preserve white space and line breaks */
-            background-color: transparent; /* Ensure consistent background */
-        }
-
-        .step-section {
-            border-left: 4px solid var(--primary-color); /* Keep the left border as a visual cue */
-            padding-left: calc(20px - 4px); /* Adjust padding to maintain alignment */
-            background-color: #f9f9f9; /* Subtle background for text steps */
-        }
-
-        .code-section {
-            /* Code section internal elements handle their own padding and background */
+            box-shadow: var(--box-shadow);
+            overflow-x: hidden; /* Prevent container scroll, let content scroll if needed */
+            max-height: 70vh; /* Limit height and enable scrolling */
+            overflow-y: auto; /* Enable vertical scroll */
+            scroll-behavior: smooth;
         }
 
-        .code-header {
-            background-color: #343a40;
-            color: white;
-            padding: 8px 20px; /* Match horizontal padding */
-            font-size: 14px;
-            font-family: 'Courier New', monospace;
-            display: flex;
-            justify-content: space-between;
-            align-items: center;
-            border-top-left-radius: 8px;
-            border-top-right-radius: 8px;
+         /* Styles for elements generated by Marked.js */
+        #solutionContainer p { margin-bottom: 1em; }
+        #solutionContainer ul, #solutionContainer ol { margin-left: 2em; margin-bottom: 1em; }
+        #solutionContainer li { margin-bottom: 0.5em; }
+        #solutionContainer h1, #solutionContainer h2, #solutionContainer h3 { margin-top: 1.5em; margin-bottom: 0.8em; font-weight: bold; color: var(--primary-color); }
+        #solutionContainer h1 { font-size: 1.8em; }
+        #solutionContainer h2 { font-size: 1.5em; }
+        #solutionContainer h3 { font-size: 1.2em; }
+        #solutionContainer strong, #solutionContainer b { font-weight: bold; }
+        #solutionContainer em, #solutionContainer i { font-style: italic; }
+        #solutionContainer table { border-collapse: collapse; width: 100%; margin-bottom: 1rem; }
+        #solutionContainer th, #solutionContainer td { border: 1px solid #d1d5db; padding: 0.5rem; text-align: left; }
+        #solutionContainer th { background-color: #f3f4f6; font-weight: 600; }
+        #solutionContainer blockquote { border-left: 4px solid #ccc; margin-left: 0; padding-left: 1em; color: #666; }
+
+        /* Styles for Code Blocks (generated by Marked + Highlight.js) */
+        #solutionContainer pre {
+            margin: 1.5em 0;
+            border-radius: 8px;
+            overflow: hidden; /* Contains the code block */
+            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
         }
-
-        .code-content {
-            margin: 0;
-            padding: 15px 20px; /* Match horizontal padding */
-            background-color: var(--code-bg);
-            color: #e6e6e6;
-            overflow-x: auto;
+        #solutionContainer pre code.hljs {
+            display: block;
+            padding: 15px;
+            background-color: var(--code-bg); /* Use defined code background */
+            color: #e6e6e6; /* Default text color for atom-one-dark */
+            overflow-x: auto; /* Enable horizontal scroll for long code lines */
             font-family: 'Courier New', monospace;
             font-size: 14px;
             line-height: 1.5;
+            border-radius: 0 0 8px 8px; /* Bottom radius */
         }
+        /* Optional: Add a language header like in the previous code */
+        /* This would require modifying how marked generates the HTML or adding JS */
 
-        .output-section {
-            background-color: var(--output-bg);
-            padding: 15px 20px; /* Match horizontal padding */
-            border-top: 1px solid #ddd;
-            color: #333;
-            font-family: 'Courier New', monospace;
-            font-size: 14px;
-            white-space: pre-wrap;
-            overflow-x: auto;
-            border-bottom-left-radius: 8px;
-            border-bottom-right-radius: 8px;
-        }
 
-        /* Apply border-radius to the very first and very last child inside #solution */
-        #solution > div:first-child {
-            border-top-left-radius: 8px;
-            border-top-right-radius: 8px;
-        }
-
-         #solution > div:last-child {
-            border-bottom-left-radius: 8px;
-            border-bottom-right-radius: 8px;
-        }
+        /* Styles for Loading Indicators */
+        .thinking-indicator, .executing-indicator, .answering-indicator { display: flex; align-items: center; padding: 10px; margin: 10px 0; border-radius: 8px; font-size: 0.9rem; }
+        .thinking-indicator { background-color: #e3f2fd; color: #1565c0; }
+        .executing-indicator { background-color: #ede7f6; color: #5e35b1; }
+        .answering-indicator { background-color: #e8f5e9; color: #2e7d32; }
+        .indicator-icon { margin-right: 10px; animation: pulse 1.5s infinite ease-in-out; }
+        @keyframes pulse { 0% { opacity: 0.6; } 50% { opacity: 1; } 100% { opacity: 0.6; } }
 
-        /* Special case for first code header within the first child */
-        #solution > .code-section:first-child .code-header {
-             border-top-left-radius: 8px;
-             border-top-right-radius: 8px;
-        }
-
-        /* Special case for last code content if it's the very last child and not followed by output */
-         #solution > .code-section:last-child .code-content:last-child:not(+.output-section) {
-             border-bottom-left-radius: 8px;
-             border-bottom-right-radius: 8px;
-         }
-
-         /* MathJax rendering output styles */
+        /* --- MathJax Specific Styles (from previous attempts, seem okay) --- */
         mjx-container {
-            overflow-x: auto;
+            overflow-x: auto !important; /* Ensure horizontal scroll for wide math */
             overflow-y: hidden;
             display: block; /* Block math */
             margin: 1em 0; /* Vertical spacing for block math */
             text-align: initial;
-            padding: 0 !important;
+            padding: 2px 0 !important; /* Adjust padding */
+             min-width: 0 !important; /* Prevent excessive width */
+             max-width: 100% !important; /* Ensure it doesn't overflow container */
         }
-         /* Inline math container */
+        /* Inline math container */
         mjx-container[display="inline"] {
-            display: inline-block; /* Inline math behaves like text */
+            display: inline-block !important; /* Inline math behaves like text */
             margin: 0 !important; /* No vertical margin for inline math */
+             overflow-x: visible !important; /* Allow inline math to flow naturally */
         }
-
-        mjx-assistive-mml {
-             display: none !important;
-        }
-
-        .MathJax nobr,.MathJax .mjx-chtml{
-            display: inline-block !important;
-            white-space: normal !important;
-        }
-        .step-section span.MathJax_Preview {
-            display: none !important;
-        }
+        mjx-assistive-mml { display: none !important; }
+        .MathJax nobr,.MathJax .mjx-chtml{ display: inline-block !important; white-space: normal !important; }
+        span.MathJax_Preview { display: none !important; }
 
     </style>
 </head>
@@ -250,49 +181,53 @@
             <h1>Version Gratuite</h1>
             <p>Vous utilisez actuellement la version gratuite de Math Solver qui vous permet de résoudre 3 problèmes par jour.</p>
 
-            <div class="feature-list">
-                <h2>Fonctionnalités disponibles :</h2>
-                <ul class="feature-list">
-                    <li><i class="fas fa-check-circle"></i> Résolution de problèmes mathématiques basiques</li>
-                    <li><i class="fas fa-check-circle"></i> 3 résolutions gratuites par jour</li>
-                    <li><i class="fas fa-check-circle"></i> Explication des étapes de résolution</li>
-                    <li><i class="fas fa-times-circle"></i> <span style="color: #999;">Mode d'exécution de code avancé (version Pro)</span></li>
-                    <li><i class="fas fa-times-circle"></i> <span style="color: #999;">Résolutions illimitées (version Pro)</span></li>
-                    <li><i class="fas fa-times-circle"></i> <span style="color: #999;">Support prioritaire (version Pro)</span></li>
-                </ul>
-            </div>
-
-            <div class="upload-section">
-                <form id="imageForm" enctype="multipart/form-data">
-                    <input type="file" id="imageInput" name="image" accept="image/*" style="display: none;">
-                    <button type="button" id="uploadButton" class="cta-button" onclick="document.getElementById('imageInput').click()">
-                        <i class="fas fa-upload"></i> Télécharger une image
-                    </button>
-                </form>
-
-                <p id="uploadStatus"></p>
-                <div id="imagePreview" style="display: none; margin: 20px auto; max-width: 500px;">
-                    <img id="preview" style="width: 100%; border-radius: 8px; box-shadow: var(--box-shadow);">
-                </div>
-
-                <button id="solveButton" class="cta-button" style="display: none; background-color: var(--secondary-color);">
-                    <i class="fas fa-calculator"></i> Résoudre ce problème
-                </button>
-            </div>
-
-            <div id="solutionOutput" style="margin-top: 30px; text-align: left; display: none;">
+            <!-- Feature list, Upload section remain the same -->
+             <div class="feature-list">
+                 <h2>Fonctionnalités disponibles :</h2>
+                 <ul class="feature-list">
+                     <li><i class="fas fa-check-circle"></i> Résolution de problèmes mathématiques basiques</li>
+                     <li><i class="fas fa-check-circle"></i> 3 résolutions gratuites par jour</li>
+                     <li><i class="fas fa-check-circle"></i> Explication des étapes de résolution</li>
+                     <li><i class="fas fa-times-circle"></i> <span style="color: #999;">Mode d'exécution de code avancé (version Pro)</span></li>
+                     <li><i class="fas fa-times-circle"></i> <span style="color: #999;">Résolutions illimitées (version Pro)</span></li>
+                     <li><i class="fas fa-times-circle"></i> <span style="color: #999;">Support prioritaire (version Pro)</span></li>
+                 </ul>
+             </div>
+
+             <div class="upload-section">
+                 <form id="imageForm" enctype="multipart/form-data">
+                     <input type="file" id="imageInput" name="image" accept="image/*" style="display: none;">
+                     <button type="button" id="uploadButton" class="cta-button" onclick="document.getElementById('imageInput').click()">
+                         <i class="fas fa-upload"></i> Télécharger une image
+                     </button>
+                 </form>
+
+                 <p id="uploadStatus"></p>
+                 <div id="imagePreview" style="display: none; margin: 20px auto; max-width: 500px;">
+                     <img id="preview" style="width: 100%; border-radius: 8px; box-shadow: var(--box-shadow);">
+                 </div>
+
+                 <button id="solveButton" class="cta-button" style="display: none; background-color: var(--secondary-color);">
+                     <i class="fas fa-calculator"></i> Résoudre ce problème
+                 </button>
+             </div>
+
+
+            <div id="solutionOutput">
                 <h3>Solution :</h3>
                 <div id="loadingIndicator" class="thinking-indicator" style="display: none;">
                     <i class="fas fa-brain indicator-icon"></i>
                     <span>Je réfléchis au problème...</span>
                 </div>
-                <div id="solution"></div>
+                <!-- Single container for the entire solution -->
+                <div id="solutionContainer"></div>
             </div>
 
+            <!-- Upgrade section remains the same -->
             <div class="upgrade-section">
-                <h2>Besoin de plus de puissance ?</h2>
-                <p>Passez à la version Pro pour des fonctionnalités avancées et des résolutions illimitées.</p>
-                <a href="#" class="cta-button">Passer à la version Pro</a>
+                 <h2>Besoin de plus de puissance ?</h2>
+                 <p>Passez à la version Pro pour des fonctionnalités avancées et des résolutions illimitées.</p>
+                 <a href="#" class="cta-button">Passer à la version Pro</a>
             </div>
         </div>
 
@@ -301,9 +236,12 @@
         </footer>
     </div>
 
+    <!-- Dependencies -->
     <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.7.0/highlight.min.js"></script>
     <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.7.0/languages/python.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/[email protected]/marked.min.js"></script> <!-- Use marked 4.x -->
 
+    <!-- MathJax Configuration and Loading -->
     <script>
         window.MathJax = {
             tex: {
@@ -315,13 +253,21 @@
             },
             options: {
                 enableMenu: false,
-                ignoreHtmlClass: 'code-content',
-                processHtmlClass: 'step-section', /* Process step-section for Math */
-                skipHtmlTags: ['script', 'noscript', 'style', 'textarea', 'pre', 'code']
+                ignoreHtmlClass: 'no-mathjax', // Ignore specific classes if needed
+                processHtmlClass: 'mathjax-process', // Process only specific classes if needed
+                skipHtmlTags: ['script', 'noscript', 'style', 'textarea', 'pre'] // Skip pre for manual highlight control
             },
             loader: {
                 load: ['[tex]/ams', '[tex]/noerrors', '[tex]/physics', '[tex]/cancel', '[tex]/color', '[tex]/mhchem', '[tex]/mathtools']
             },
+            startup: {
+                // Function to run once MathJax is ready
+                ready: () => {
+                    console.log('MathJax is ready');
+                    window.mathJaxReady = true; // Flag for our script
+                    MathJax.startup.defaultReady(); // Perform default startup actions
+                }
+            },
             svg: {
                 fontCache: 'global'
             }
@@ -329,140 +275,177 @@
     </script>
     <script id="MathJax-script" async src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-svg.js"></script>
 
+    <!-- Main Application Logic -->
     <script>
-        document.getElementById('imageInput').addEventListener('change', function(event) {
-            const file = event.target.files[0];
-            if (file) {
-                const reader = new FileReader();
-                reader.onload = function(e) {
-                    document.getElementById('preview').src = e.target.result;
-                    document.getElementById('imagePreview').style.display = 'block';
-                    document.getElementById('solveButton').style.display = 'inline-block';
-                    document.getElementById('uploadStatus').textContent = `Image sélectionnée : ${file.name}`;
-                }
-                reader.readAsDataURL(file);
-            }
-        });
-
-        document.getElementById('solveButton').addEventListener('click', function() {
-            const formData = new FormData(document.getElementById('imageForm'));
+        document.addEventListener('DOMContentLoaded', () => {
+            // DOM Elements
+            const imageInput = document.getElementById('imageInput');
+            const imagePreview = document.getElementById('imagePreview');
+            const previewImage = document.getElementById('preview');
+            const solveButton = document.getElementById('solveButton');
+            const uploadStatus = document.getElementById('uploadStatus');
             const solutionOutput = document.getElementById('solutionOutput');
             const loadingIndicator = document.getElementById('loadingIndicator');
-            const solution = document.getElementById('solution');
-
-            solutionOutput.style.display = 'block';
-            loadingIndicator.style.display = 'flex';
-            solution.innerHTML = '';
-
-            fetch('/solved', {
-                method: 'POST',
-                body: formData
-            })
-            .then(response => {
-                const reader = response.body.getReader();
-                const decoder = new TextDecoder();
-                let buffer = '';
-
-                function processStream({ done, value }) {
-                    if (done) {
-                        loadingIndicator.style.display = 'none';
-                        return;
+            const solutionContainer = document.getElementById('solutionContainer');
+            const imageForm = document.getElementById('imageForm');
+
+            // State Variables
+            let solutionBuffer = '';
+            let currentMode = null; // To potentially handle 'thinking' vs 'answering' differently if needed
+            let updateTimeout = null;
+
+            // Configure Marked and Highlight.js
+            marked.setOptions({
+                highlight: function(code, lang) {
+                    const language = hljs.getLanguage(lang) ? lang : 'plaintext';
+                    return hljs.highlight(code, { language }).value;
+                },
+                langPrefix: 'hljs language-', // CSS class prefix for hljs
+                gfm: true, // Enable GitHub Flavored Markdown
+                breaks: true // Convert single line breaks to <br>
+            });
+
+             // Function to update the display (debounced)
+            const updateDisplay = async () => {
+                if (!solutionContainer) return;
+
+                // Parse the entire buffer with Marked
+                solutionContainer.innerHTML = marked.parse(solutionBuffer);
+
+                 // Ensure MathJax is ready before typesetting
+                if (window.mathJaxReady) {
+                    try {
+                         // Tell MathJax to process the updated container
+                        await MathJax.typesetPromise([solutionContainer]);
+                        console.log("MathJax typesetting complete.");
+                    } catch (e) {
+                        console.error('MathJax typesetting failed:', e);
+                    }
+                } else {
+                    console.warn("MathJax not ready, typesetting skipped for this update.");
+                    // Optionally, queue this update or retry later
+                }
+
+                // Highlight code blocks (already done by marked's highlight option)
+                // hljs.highlightAll(); // Not needed if using marked's highlight option
+
+                // Scroll to bottom
+                solutionContainer.scrollTop = solutionContainer.scrollHeight;
+                updateTimeout = null; // Clear the timeout flag
+            };
+
+            // Schedule display update (debouncing)
+            const scheduleUpdate = () => {
+                if (!updateTimeout) {
+                    updateTimeout = setTimeout(updateDisplay, 150); // Update slightly faster
+                }
+            };
+
+            // Image selection handler
+            imageInput.addEventListener('change', function(event) {
+                const file = event.target.files[0];
+                if (file) {
+                    const reader = new FileReader();
+                    reader.onload = function(e) {
+                        previewImage.src = e.target.result;
+                        imagePreview.style.display = 'block';
+                        solveButton.style.display = 'inline-block';
+                        uploadStatus.textContent = `Image sélectionnée : ${file.name}`;
                     }
+                    reader.readAsDataURL(file);
+                }
+            });
 
-                    buffer += decoder.decode(value, { stream: true });
-                    const lines = buffer.split('\n\n');
-                    buffer = lines.pop();
-
-                    for (const line of lines) {
-                        if (line.startsWith('data: ')) {
-                            try {
-                                const data = JSON.parse(line.substr(6));
-
-                                if (data.mode) {
-                                    if (data.mode === 'thinking') {
-                                        loadingIndicator.className = 'thinking-indicator';
-                                        loadingIndicator.innerHTML = '<i class="fas fa-brain indicator-icon"></i><span>Je réfléchis au problème...</span>';
-                                    } else if (data.mode === 'answering') {
-                                        loadingIndicator.className = 'answering-indicator';
-                                        loadingIndicator.innerHTML = '<i class="fas fa-pencil-alt indicator-icon"></i><span>Rédaction de la solution...</span>';
-                                    } else if (data.mode === 'executing_code') {
-                                        loadingIndicator.className = 'executing-indicator';
-                                        loadingIndicator.innerHTML = '<i class="fas fa-code indicator-icon"></i><span>Exécution de code pour la résolution...</span>';
-                                    } else if (data.mode === 'code_result') {
-                                        loadingIndicator.className = 'executing-indicator';
-                                        loadingIndicator.innerHTML = '<i class="fas fa-terminal indicator-icon"></i><span>Traitement des résultats...</span>';
-                                    }
+            // Solve button handler
+            solveButton.addEventListener('click', function() {
+                const formData = new FormData(imageForm);
+
+                solutionOutput.style.display = 'block';
+                loadingIndicator.style.display = 'flex';
+                solutionContainer.innerHTML = ''; // Clear previous solution
+                solutionBuffer = ''; // Reset buffer
+                currentMode = null; // Reset mode
+
+                fetch('/solved', { // Ensure this endpoint matches your backend
+                    method: 'POST',
+                    body: formData
+                })
+                .then(response => {
+                    if (!response.ok) {
+                        throw new Error(`HTTP error! status: ${response.status}`);
+                    }
+                    const reader = response.body.getReader();
+                    const decoder = new TextDecoder();
+                    let streamBuffer = ''; // Buffer for incoming stream chunks
+
+                    function processStream({ done, value }) {
+                        if (done) {
+                            loadingIndicator.style.display = 'none';
+                            // Process any remaining data in streamBuffer (optional, depends on backend)
+                            if (streamBuffer && streamBuffer.startsWith('data: ')) {
+                                try {
+                                     const data = JSON.parse(streamBuffer.substr(6));
+                                     if (data.content) {
+                                         solutionBuffer += data.content; // Add final piece
+                                     }
+                                } catch (e) {
+                                     console.error('Error parsing final chunk:', e, streamBuffer);
                                 }
+                            }
+                             // Final forced update
+                            clearTimeout(updateTimeout); // Cancel any scheduled update
+                            updateDisplay(); // Render everything received
+                            return;
+                        }
 
-                                if (data.content) {
-                                    const content = data.content;
-                                    const contentContainer = document.createElement('div');
-
-                                    if (content.includes('```python')) {
-                                        const codeHtml = content.replace(/```python\n([\s\S]*?)\n```/g, function(match, p1) {
-                                            return `<div class="code-section">
-                                                <div class="code-header">
-                                                    <span>Code Python</span>
-                                                </div>
-                                                <pre class="code-content"><code class="language-python">${p1}</code></pre>
-                                            </div>`;
-                                        });
-                                        contentContainer.innerHTML = codeHtml;
-                                        solution.appendChild(contentContainer);
-                                        contentContainer.querySelectorAll('pre code').forEach((block) => {
-                                            hljs.highlightElement(block);
-                                        });
-                                    }
-                                    else if (content.includes('Résultat d\'exécution:')) {
-                                         const outputHtml = content.replace(/Résultat d'exécution:\n```\n([\s\S]*?)\n```/g, function(match, p1) {
-                                            return `<div class="output-section">${p1}</div>`;
-                                        });
-                                        contentContainer.innerHTML = outputHtml;
-                                        solution.appendChild(contentContainer);
+                        streamBuffer += decoder.decode(value, { stream: true });
+                        const lines = streamBuffer.split('\n\n');
+                        streamBuffer = lines.pop(); // Keep incomplete chunk
+
+                        for (const line of lines) {
+                            if (line.startsWith('data: ')) {
+                                try {
+                                    const data = JSON.parse(line.substr(6));
+
+                                    if (data.mode) {
+                                        currentMode = data.mode; // Store current mode if backend provides it
+                                        // Update loading indicator based on mode (same as before)
+                                        if (data.mode === 'thinking') { loadingIndicator.className = 'thinking-indicator'; loadingIndicator.innerHTML = '<i class="fas fa-brain indicator-icon"></i><span>Je réfléchis...</span>'; }
+                                        else if (data.mode === 'answering') { loadingIndicator.className = 'answering-indicator'; loadingIndicator.innerHTML = '<i class="fas fa-pencil-alt indicator-icon"></i><span>Rédaction...</span>'; }
+                                        else if (data.mode === 'executing_code') { loadingIndicator.className = 'executing-indicator'; loadingIndicator.innerHTML = '<i class="fas fa-code indicator-icon"></i><span>Exécution...</span>'; }
+                                        else if (data.mode === 'code_result') { loadingIndicator.className = 'executing-indicator'; loadingIndicator.innerHTML = '<i class="fas fa-terminal indicator-icon"></i><span>Résultats...</span>'; }
                                     }
-                                    else {
-                                        contentContainer.className = 'step-section';
-                                        contentContainer.innerHTML = content;
-                                        solution.appendChild(contentContainer);
-                                        MathJax.typesetPromise([contentContainer]).catch(e => console.error('MathJax typesetting error:', e));
+
+                                    if (data.content) {
+                                        solutionBuffer += data.content; // Append content to buffer
+                                        scheduleUpdate(); // Schedule an update
                                     }
-                                }
 
-                                if (data.error) {
-                                    const errorDiv = document.createElement('div');
-                                    errorDiv.style.color = 'red';
-                                    errorDiv.style.margin = '15px 0';
-                                    errorDiv.style.padding = '10px';
-                                    errorDiv.style.background = '#ffeeee';
-                                    errorDiv.style.borderRadius = '5px';
-                                    errorDiv.textContent = `Erreur: ${data.error}`;
-                                    solution.appendChild(errorDiv);
-                                    loadingIndicator.style.display = 'none';
+                                    if (data.error) {
+                                        // Display error prominently
+                                        solutionBuffer += `\n\n**Erreur:** ${data.error}\n\n`;
+                                        scheduleUpdate(); // Show the error
+                                        loadingIndicator.style.display = 'none';
+                                    }
+                                } catch (e) {
+                                    console.error('Error parsing JSON from stream:', e, line);
+                                    // Optionally display a parsing error message to the user
+                                    solutionBuffer += `\n\n**Erreur interne:** Impossible d'interpréter une partie de la réponse.\n\n`;
+                                    scheduleUpdate();
                                 }
-                            } catch (e) {
-                                console.error('Error parsing JSON from stream:', e, line);
                             }
                         }
+                        // Continue reading the stream
+                        return reader.read().then(processStream);
                     }
-
-                    window.scrollTo(0, document.body.scrollHeight);
-
+                    // Start processing the stream
                     return reader.read().then(processStream);
-                }
-
-                return reader.read().then(processStream);
-            })
-            .catch(error => {
-                const errorDiv = document.createElement('div');
-                errorDiv.style.color = 'red';
-                errorDiv.style.margin = '15px 0';
-                errorDiv.style.padding = '10px';
-                errorDiv.style.background = '#ffeeee';
-                errorDiv.style.borderRadius = '5px';
-                errorDiv.textContent = `Erreur de connexion ou du serveur: ${error}`;
-                solution.appendChild(errorDiv);
-                loadingIndicator.style.display = 'none';
-                console.error('Fetch error:', error);
+                })
+                .catch(error => {
+                    console.error('Fetch error:', error);
+                    solutionContainer.innerHTML = `<p style="color: red; font-weight: bold;">Erreur de connexion ou du serveur: ${error.message}</p>`;
+                    loadingIndicator.style.display = 'none';
+                });
             });
         });
     </script>