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Docfile commited on May 2

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Update templates/index.html

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@@ -1,578 +1,565 @@
 <!DOCTYPE html>
-<html lang="fr">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>Mariam AI</title>
   <!-- Tailwind CSS via CDN -->
   <script src="https://cdn.tailwindcss.com?plugins=forms,typography"></script>
   <!-- Font Awesome pour les icônes -->
-  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
   <!-- Google Fonts -->
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet">
   <!-- Favicon (Emoji amélioré) -->
   <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>✨</text></svg>">
   <script>
     tailwind.config = {
       darkMode: 'class',
       theme: {
         extend: {
           fontFamily: {
-            sans: ['Inter', 'system-ui', 'sans-serif'],
-            mono: ['"JetBrains Mono"', 'monospace']
           },
           colors: {
-            primary: { 50: '#f0f9ff', 100: '#e0f2fe', 200: '#bae6fd', 300: '#7dd3fc', 400: '#38bdf8', 500: '#0ea5e9', 600: '#0284c7', 700: '#0369a1', 800: '#075985', 900: '#0c4a6e' },
-            secondary: { 50: '#f8fafc', 100: '#f1f5f9', 200: '#e2e8f0', 300: '#cbd5e1', 400: '#94a3b8', 500: '#64748b', 600: '#475569', 700: '#334155', 800: '#1e293b', 900: '#0f172a' },
-            accent: { 50: '#fdf4ff', 100: '#fae8ff', 200: '#f5d0fe', 300: '#f0abfc', 400: '#e879f9', 500: '#d946ef', 600: '#c026d3', 700: '#a21caf', 800: '#86198f', 900: '#701a75' }
           },
-          animation: { 'bounce-slow': 'bounce 2s infinite', 'pulse-slow': 'pulse 3s infinite', 'typing': 'typing 1.2s steps(3) infinite' },
-          keyframes: { typing: { '0%': { width: '0.15em' }, '50%': { width: '0.7em' }, '100%': { width: '0.15em' } } }
         }
       }
     }
   </script>
   <style>
-    html {
-      scroll-behavior: smooth;
-      overflow-x: hidden; /* Empêche le scroll horizontal global */
-    }
-    body {
-      font-family: 'Inter', sans-serif;
-      transition: background-color 0.3s ease, color 0.3s ease;
-      overflow-x: hidden; /* Empêche le scroll horizontal du body */
-    }
-    .chat-layout {
-      min-height: calc(100vh - 64px);
-      display: grid;
-      grid-template-rows: 1fr auto;
-    }
-    ::-webkit-scrollbar {
-      width: 5px;
-      height: 5px;
-    }
-    ::-webkit-scrollbar-track {
-      background: transparent;
-    }
-    ::-webkit-scrollbar-thumb {
-      background: #cbd5e1;
-      border-radius: 5px;
-    }
-    .dark ::-webkit-scrollbar-thumb {
-      background: #475569;
-    }
-    ::-webkit-scrollbar-thumb:hover {
-      background: #94a3b8;
     }
-    .dark ::-webkit-scrollbar-thumb:hover {
-      background: #64748b;
     }
     .message-bubble {
       position: relative;
       max-width: 85%;
-      border-radius: 1rem;
-      padding: 0.875rem 1rem;
-      line-height: 1.5;
-      animation: message-fade-in 0.3s ease-out;
-      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
       transition: transform 0.2s ease, box-shadow 0.2s ease;
     }
-    .message-bubble:hover {
-      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.1);
-    }
-    .dark .message-bubble {
-      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
-    }
-    .dark .message-bubble:hover {
-      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2), 0 1px 3px rgba(0, 0, 0, 0.3);
-    }
     .user-message {
-      border-bottom-right-radius: 0.125rem;
       align-self: flex-end;
-      background: linear-gradient(to bottom right, #3b82f6, #2563eb);
-      color: white;
     }
-    .assistant-message {
-      border-bottom-left-radius: 0.125rem;
       align-self: flex-start;
     }
-    .dark .assistant-message {
-      background-color: #1e293b;
-      color: #e2e8f0;
-      border-color: #334155;
-    }
-    @keyframes message-fade-in {
-      from { opacity: 0; transform: translateY(10px); }
-      to { opacity: 1; transform: translateY(0); }
-    }
-    @keyframes pulse-fade {
-      0%, 100% { opacity: 0.5; }
-      50% { opacity: 1; }
     }
-    .typing-indicator {
-      display: inline-flex;
-      align-items: center;
-      margin-left: 0.5rem;
     }
     .typing-dot {
-      width: 0.5rem;
-      height: 0.5rem;
-      border-radius: 50%;
-      background-color: currentColor;
-      opacity: 0.7;
-      margin: 0 0.1rem;
-    }
-    .typing-dot:nth-child(1) { animation: pulse-fade 1.2s 0s infinite; }
-    .typing-dot:nth-child(2) { animation: pulse-fade 1.2s 0.2s infinite; }
-    .typing-dot:nth-child(3) { animation: pulse-fade 1.2s 0.4s infinite; }
-    .dark body {
-      background-color: #0f172a;
-      color: #e2e8f0;
-    }
-    .tooltip {
-      position: relative;
     }
     .tooltip .tooltip-text {
-      visibility: hidden;
-      width: max-content;
-      max-width: 200px;
-      background-color: #1e293b;
-      color: #f8fafc;
-      text-align: center;
-      border-radius: 6px;
-      padding: 0.375rem 0.625rem;
       position: absolute;
-      z-index: 1;
-      bottom: 125%;
       left: 50%;
       transform: translateX(-50%);
-      opacity: 0;
-      transition: opacity 0.3s, visibility 0.3s;
-      font-size: 0.75rem;
-      box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
       pointer-events: none;
     }
-    .dark .tooltip .tooltip-text {
-      background-color: #475569;
-      color: #f1f5f9;
-    }
     .tooltip .tooltip-text::after {
-      content: "";
-      position: absolute;
-      top: 100%;
-      left: 50%;
-      margin-left: -5px;
-      border-width: 5px;
-      border-style: solid;
-      border-color: #1e293b transparent transparent transparent;
-    }
-    .dark .tooltip .tooltip-text::after {
-      border-color: #475569 transparent transparent transparent;
-    }
-    .tooltip:hover .tooltip-text {
-      visibility: visible;
-      opacity: 1;
     }
     .copy-btn {
-      position: absolute;
-      top: 0.5rem;
-      right: 0.5rem;
-      opacity: 0;
-      transition: opacity 0.2s ease, background-color 0.2s ease;
-      z-index: 2;
     }
-    .message-bubble:hover .copy-btn {
-      opacity: 1;
     }
-    .file-preview {
-      max-width: 300px;
-      margin: 0.5rem auto;
-      position: relative;
-      overflow: hidden;
-      border-radius: 0.5rem;
       transition: transform 0.2s ease;
     }
-    .file-preview:hover {
-      transform: scale(1.02);
-    }
-    .file-preview img {
-      width: 100%;
-      height: auto;
-      display: block;
-      object-fit: cover;
     }
     .chip {
-      display: inline-flex;
-      align-items: center;
-      background: #e0f2fe;
-      border-radius: 9999px;
-      padding: 0.25rem 0.75rem;
-      font-size: 0.75rem;
-      font-weight: 500;
-      color: #0369a1;
       transition: all 0.2s ease;
     }
-    .chip .chip-icon { margin-right: 0.25rem; }
     .chip .chip-close {
-      margin-left: 0.25rem;
-      cursor: pointer;
-      opacity: 0.7;
-      transition: opacity 0.2s ease;
-    }
-    .chip .chip-close:hover { opacity: 1; }
-    .dark .chip {
-      background: #0c4a6e;
-      color: #7dd3fc;
-    }
-    .toggle-switch {
-      position: relative;
-      display: inline-block;
-      width: 2.5rem;
-      height: 1.25rem;
-    }
-    .toggle-switch input {
-      opacity: 0;
-      width: 0;
-      height: 0;
     }
     .toggle-slider {
-      position: absolute;
-      cursor: pointer;
-      top: 0;
-      left: 0;
-      right: 0;
-      bottom: 0;
-      background-color: #cbd5e1;
-      transition: .4s;
-      border-radius: 1.25rem;
     }
     .toggle-slider:before {
-      position: absolute;
-      content: "";
-      height: 0.875rem;
-      width: 0.875rem;
-      left: 0.25rem;
-      bottom: 0.1875rem;
-      background-color: white;
-      transition: .4s;
-      border-radius: 50%;
-    }
-    input:checked + .toggle-slider {
-      background-color: #0ea5e9;
-    }
-    input:focus + .toggle-slider {
-      box-shadow: 0 0 1px #0ea5e9;
-    }
-    input:checked + .toggle-slider:before {
-      transform: translateX(1.125rem);
-    }
-    .dark .toggle-slider {
-      background-color: #475569;
-    }
-    .dark input:checked + .toggle-slider {
-      background-color: #38bdf8;
-    }
-    .chat-input {
-      transition: all 0.3s ease;
-      border-color: #e2e8f0;
-    }
-    .chat-input:focus {
-      border-color: #38bdf8;
-      box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
-    }
-    .dark .chat-input {
-      background-color: #1e293b;
-      color: #f1f5f9;
-      border-color: #334155;
     }
-    .dark .chat-input:focus {
-      border-color: #38bdf8;
-      box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
-    }
-    pre {
-      position: relative;
-      background-color: #f8fafc;
-      border-radius: 0.5rem;
-      margin: 1rem 0;
-      padding: 1.25rem 1rem;
-      overflow-x: auto;
-    }
-    .dark pre {
-      background-color: #1e293b;
-      color: #e2e8f0;
-    }
-    code {
-      font-family: 'JetBrains Mono', monospace;
-      font-size: 0.875rem;
-    }
-    .code-copy-btn {
-      position: absolute;
-      top: 0.5rem;
-      right: 0.5rem;
-      opacity: 0;
-      transition: opacity 0.2s ease;
-    }
-    pre:hover .code-copy-btn {
-      opacity: 0.7;
-    }
-    /* Amélioration de l'affichage des tableaux Markdown */
-    .table-wrapper {
-      width: 100%;
-      overflow-x: auto;
-      margin: 1rem 0;
-      border: 1px solid #e2e8f0;
-      border-radius: 0.5rem;
-    }
-    .dark .table-wrapper {
-      border-color: #334155;
-    }
-    .prose table {
-      width: 100%;
-      min-width: 100%;
-      border-collapse: collapse;
-      margin: 0;
-    }
-    .prose table th,
-    .prose table td {
-      border: 1px solid #e2e8f0;
-      padding: 0.5rem 0.75rem;
-      text-align: left;
-      border-top: none;
-      border-left: none;
-      border-right: none;
-    }
-    .prose table th {
-      border-bottom-width: 2px;
-    }
-    .dark .prose table th,
-    .dark .prose table td {
-      border-color: #334155;
-    }
-    .prose table thead {
-      background-color: #f8fafc;
-      font-weight: 600;
-    }
-    .dark .prose table thead {
-      background-color: #1e293b;
-    }
-    .prose table tbody tr:nth-child(even) {
-      background-color: #f8fafc;
-    }
-    .dark .prose table tbody tr:nth-child(even) {
-      background-color: #1e293b;
-    }
-    /* Pour le textarea qui s'adapte au contenu */
     .chat-textarea {
-      resize: none;
       min-height: 44px;
-      max-height: 200px;
-      overflow-y: auto;
       line-height: 1.5;
-      width: 100%;
-      border-radius: 9999px;
       padding-top: 0.625rem;
       padding-bottom: 0.625rem;
       padding-left: 1rem;
-      padding-right: 3rem;
-      box-sizing: border-box;
-    }
-    /* Ajustements responsive */
-    @media (max-width: 640px) {
-      .message-bubble {
-        max-width: 90%;
-        padding: 0.75rem 0.875rem;
-      }
-      .chat-textarea {
-        max-height: 120px;
-        font-size: 0.95rem;
-        min-height: 40px;
-        padding-top: 0.5rem;
-        padding-bottom: 0.5rem;
-      }
-      .prose table {
-        min-width: 0;
-        font-size: 0.85rem;
-      }
-      .prose table th,
-      .prose table td {
-        padding: 0.375rem 0.5rem;
-      }
-      .send-button-wrapper {
-        padding-right: 0.25rem;
-      }
-      .chat-textarea {
-        padding-right: 2.75rem;
-      }
-      #send-button {
-        width: 32px;
-        height: 32px;
-        padding: 0;
-        display: inline-flex;
-        align-items: center;
-        justify-content: center;
-      }
-      #send-button i {
-        font-size: 0.9rem;
-      }
     }
-    /* Container pour le textarea et le bouton */
-    .input-wrapper {
-      position: relative;
-      display: flex;
-      align-items: flex-end;
     }
-    .send-button-wrapper {
-      position: absolute;
-      right: 0.5rem;
-      bottom: 0.5rem;
     }
   </style>
 </head>
-<body class="bg-gray-50 text-gray-900 antialiased">
-  <!-- Header -->
-  <header class="bg-gradient-to-r from-primary-600 to-primary-800 text-white py-3 px-4 shadow-md sticky top-0 z-10">
-    <div class="max-w-4xl mx-auto flex justify-between items-center">
-      <!-- Logo & Titre -->
-      <div class="flex items-center space-x-2">
-        <img src="https://mariam-241.vercel.app/static/image/logoboma.png" alt="Logo Mariam AI" class="h-8 sm:h-10 object-contain">
-        <h1 class="text-xl font-bold">Mariam AI</h1>
-      </div>
-      <!-- Actions -->
-      <div class="flex items-center space-x-2 sm:space-x-4">
-        <button id="theme-toggle" class="p-2 rounded-full hover:bg-primary-700/50 transition-colors duration-200 tooltip" aria-label="Changer de thème">
-          <i class="fa-solid fa-moon dark:hidden"></i>
-          <i class="fa-solid fa-sun hidden dark:inline"></i>
-          <span class="tooltip-text">Mode clair/sombre</span>
-        </button>
-        <form action="/clear" method="POST" id="clear-form">
-          <button type="submit" class="flex items-center bg-red-500 hover:bg-red-600 text-white text-xs font-semibold py-1.5 px-3 rounded-full transition duration-200 focus:outline-none focus:ring-2 focus:ring-red-400 focus:ring-opacity-75 tooltip">
-            <i class="fa-solid fa-trash-can mr-1.5"></i>
-            <span class="hidden sm:inline">Effacer</span>
-            <span class="tooltip-text">Effacer la conversation</span>
           </button>
-        </form>
-      </div>
-    </div>
-  </header>
-  <!-- Main Container -->
-  <main class="max-w-4xl mx-auto chat-layout">
-    <!-- Conteneur des messages -->
-    <section id="chat-messages" class="flex flex-col space-y-6 p-4 overflow-y-auto">
-      <!-- Chargement de l'historique -->
-      <div id="history-loading" class="text-center py-10">
-        <div class="inline-flex items-center px-4 py-2 bg-primary-50 text-primary-700 rounded-lg dark:bg-primary-900/30 dark:text-primary-300">
-          <svg class="animate-spin h-5 w-5 mr-3" viewBox="0 0 24 24">
-            <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
-            <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
-          </svg>
-          <span>Chargement de la conversation...</span>
         </div>
       </div>
-      <!-- Indicateur de chargement pour les réponses -->
-      <div id="loading-indicator" class="flex items-start space-x-2 hidden">
-        <div class="w-8 h-8 rounded-full bg-primary-100 flex items-center justify-center flex-shrink-0 dark:bg-primary-900/50">
-          <span class="text-lg">✨</span>
         </div>
-        <div class="message-bubble assistant-message bg-secondary-50 text-secondary-900 border border-secondary-200 flex items-center">
-          <span>Mariam réfléchit</span>
-          <div class="typing-indicator">
-            <span class="typing-dot"></span>
-            <span class="typing-dot"></span>
-            <span class="typing-dot"></span>
           </div>
         </div>
-      </div>
-    </section>
-    <!-- Conteneur du bas -->
-    <div class="border-t border-gray-200 dark:border-gray-700">
-      <!-- Zone d'erreur -->
-      <div id="error-message" class="bg-red-100 border-l-4 border-red-500 text-red-700 p-4 dark:bg-red-900/30 dark:text-red-300 dark:border-red-600 hidden" role="alert">
-        <div class="flex">
-          <div class="flex-shrink-0"><i class="fa-solid fa-circle-exclamation"></i></div>
-          <div class="ml-3"><p class="text-sm font-medium" id="error-text">Le message d'erreur détaillé ira ici.</p></div>
-          <button class="ml-auto" id="dismiss-error"><i class="fa-solid fa-xmark"></i></button>
         </div>
       </div>
-      <!-- Zone de prévisualisation -->
-      <div id="preview-area" class="px-4 py-2 bg-gray-50 dark:bg-gray-800/50 hidden">
-        <div id="file-preview" class="hidden"></div>
-      </div>
-      <!-- Barre d'options -->
-      <div class="flex items-center justify-between flex-wrap gap-y-2 px-4 py-2 bg-gray-100 dark:bg-gray-800/80 text-sm text-gray-600 dark:text-gray-300">
-         <div class="flex items-center space-x-4 flex-wrap gap-y-2">
-           <label class="flex items-center cursor-pointer tooltip">
-             <span class="mr-2 text-xs sm:text-sm font-medium"><i class="fa-solid fa-globe mr-1.5"></i><span class="hidden sm:inline">Recherche Web</span></span>
-             <span class="toggle-switch">
-               <input type="checkbox" id="web_search_toggle" name="web_search" value="true">
-               <span class="toggle-slider"></span>
-             </span>
-             <span class="tooltip-text">Activer la recherche web</span>
-           </label>
-           <label class="flex items-center cursor-pointer tooltip">
-             <span class="mr-2 text-xs sm:text-sm font-medium text-accent-700 dark:text-accent-300">
-               <i class="fa-solid fa-brain mr-1.5"></i>
-               <span class="hidden sm:inline">Avancé</span>
-               <span id="advanced-cooldown-timer" class="text-xs ml-1 hidden"></span>
-             </span>
-             <span class="toggle-switch">
-               <input type="checkbox" id="advanced_reasoning_toggle" name="advanced_reasoning" value="true">
-               <span class="toggle-slider"></span>
-             </span>
-             <span class="tooltip-text">Raisonnement avancé (1 fois/min)</span>
-           </label>
-         </div>
-         <div class="flex items-center space-x-2">
-           <label for="file_upload" class="cursor-pointer flex items-center text-primary-600 hover:text-primary-700 dark:text-primary-400 dark:hover:text-primary-300 tooltip">
-             <i class="fa-solid fa-paperclip"></i>
-             <span class="ml-1.5 hidden sm:inline">Fichier</span>
-             <input type="file" id="file_upload" name="file" class="hidden" accept=".txt,.pdf,.png,.jpg,.jpeg">
-             <span class="tooltip-text">Joindre (txt, pdf, image)</span>
-           </label>
-           <div id="file-chip" class="chip hidden">
-             <i class="fa-solid fa-file chip-icon"></i>
-             <span id="file-name" class="truncate max-w-[100px] sm:max-w-[120px]"></span>
-             <i id="clear-file" class="fa-solid fa-xmark chip-close"></i>
-           </div>
-         </div>
       </div>
-      <!-- Formulaire de chat -->
-      <form id="chat-form" class="p-3 sm:p-4 bg-white dark:bg-gray-900">
-        <div class="input-wrapper">
           <textarea
             id="prompt"
             name="prompt"
-            class="chat-input chat-textarea w-full border focus:outline-none text-sm sm:text-base"
             placeholder="Posez votre question à Mariam..."
             autocomplete="off"
-            rows="1"></textarea>
           <div class="send-button-wrapper">
             <button
               type="submit"
               id="send-button"
-              class="bg-primary-500 hover:bg-primary-600 disabled:bg-primary-300 text-white rounded-full p-2 transition focus:outline-none focus:ring-2 focus:ring-primary-400 flex items-center justify-center"
-              title="Envoyer le message">
-              <i class="fa-solid fa-paper-plane text-sm"></i>
             </button>
           </div>
         </div>
-        <div class="text-xs text-center mt-2 text-gray-400 dark:text-gray-500">
-          Appuyez sur <kbd class="px-1.5 py-0.5 bg-gray-100 dark:bg-gray-800 rounded border border-gray-300 dark:border-gray-700">Entrée</kbd>
-          <span class="hidden sm:inline"> pour envoyer</span>
-          <span class="sm:hidden"> pour une nouvelle ligne</span>
-          •
-          <kbd class="px-1.5 py-0.5 bg-gray-100 dark:bg-gray-800 rounded border border-gray-300 dark:border-gray-700">Shift+Entrée</kbd>
-          <span class="hidden sm:inline"> pour une nouvelle ligne</span>
-          <span class="sm:hidden"> pour envoyer</span>
-        </div>
       </form>
     </div>
-  </main>
   <!-- Scripts -->
   <script>
     document.addEventListener('DOMContentLoaded', () => {
-      // Sélection des éléments
       const chatForm = document.getElementById('chat-form');
       const promptInput = document.getElementById('prompt');
       const chatMessages = document.getElementById('chat-messages');
@@ -586,507 +573,704 @@
       const fileChip = document.getElementById('file-chip');
       const fileNameSpan = document.getElementById('file-name');
       const clearFileButton = document.getElementById('clear-file');
-      const filePreview = document.getElementById('file-preview');
       const previewArea = document.getElementById('preview-area');
       const sendButton = document.getElementById('send-button');
       const clearForm = document.getElementById('clear-form');
       const advancedToggle = document.getElementById('advanced_reasoning_toggle');
       const advancedCooldownTimerSpan = document.getElementById('advanced-cooldown-timer');
       const themeToggleBtn = document.getElementById('theme-toggle');
-      const API_CHAT_ENDPOINT = '/api/chat';
-      const API_HISTORY_ENDPOINT = '/api/history';
-      const CLEAR_ENDPOINT = '/clear';
-      const COOLDOWN_DURATION = 60 * 1000;
-      const MOBILE_BREAKPOINT = 640;
       let advancedToggleCooldownEndTime = 0;
       let isComposing = false;
-      // Gestion du thème
-      function initializeTheme() {
-        if (localStorage.theme === 'dark' || (!('theme' in localStorage) && window.matchMedia('(prefers-color-scheme: dark)').matches)) {
-          document.documentElement.classList.add('dark');
-        } else {
-          document.documentElement.classList.remove('dark');
-        }
-      }
-      function toggleTheme() {
-        if (document.documentElement.classList.contains('dark')) {
-          document.documentElement.classList.remove('dark');
-          localStorage.theme = 'light';
-        } else {
-          document.documentElement.classList.add('dark');
-          localStorage.theme = 'dark';
-        }
       }
-      themeToggleBtn.addEventListener('click', toggleTheme);
-      initializeTheme();
-      // Ajuster la hauteur du textarea
-      function adjustTextareaHeight(textarea) {
-        textarea.style.height = 'auto';
-        const style = window.getComputedStyle(textarea);
-        const maxHeight = parseInt(style.maxHeight, 10);
-        const newHeight = Math.min(maxHeight || 200, textarea.scrollHeight);
-        textarea.style.height = newHeight + 'px';
       }
-      // Défilement vers le bas
-      function scrollToBottom(smooth = true) {
-        setTimeout(() => {
-          chatMessages.scrollTo({ top: chatMessages.scrollHeight, behavior: smooth ? 'smooth' : 'auto' });
-        }, 50);
       }
-      // Affichage de l'indicateur de chargement
       function showLoading(show) {
-        if (show) {
-          loadingIndicator.classList.remove('hidden');
-          chatMessages.appendChild(loadingIndicator);
-          scrollToBottom();
-        } else {
-          loadingIndicator.classList.add('hidden');
-        }
         sendButton.disabled = show;
         promptInput.disabled = show;
         fileUpload.disabled = show;
         if (show) {
           clearFileButton.style.pointerEvents = 'none';
           clearFileButton.style.opacity = '0.5';
         } else {
           clearFileButton.style.pointerEvents = 'auto';
-          clearFileButton.style.opacity = '0.7';
         }
       }
-      // Affichage des erreurs
       function displayError(message) {
-        errorTextP.textContent = message || "Une erreur inconnue est survenue.";
-        errorMessageDiv.classList.remove('hidden');
       }
-      dismissErrorBtn.addEventListener('click', () => { errorMessageDiv.classList.add('hidden'); });
-      // Ajout d'un message dans le chat
-      function addMessageToChat(role, content, isHtml = false) {
-        errorMessageDiv.classList.add('hidden');
-        const messageWrapper = document.createElement('div');
-        messageWrapper.classList.add('flex', 'w-full', role === 'user' ? 'justify-end' : 'justify-start');
-        let messageContentHtml = '';
-        if (isHtml) {
-          messageContentHtml = content;
         } else {
-          messageContentHtml = `<p class="text-sm sm:text-base whitespace-pre-wrap">${escapeHtml(content)}</p>`;
         }
-        let bubbleHtml = '';
         if (role === 'user') {
-          bubbleHtml = `
-            <div class="message-bubble user-message">
-              ${messageContentHtml}
             </div>
           `;
-        } else {
-          bubbleHtml = `
-            <div class="flex items-start space-x-2 max-w-[85%]">
-              <div class="w-8 h-8 rounded-full bg-primary-100 flex items-center justify-center flex-shrink-0 dark:bg-primary-900/50">
-                <span class="text-lg">✨</span>
-              </div>
-              <div class="message-bubble assistant-message bg-secondary-50 text-secondary-900 border border-secondary-200 relative">
-                <div class="prose prose-sm sm:prose-base max-w-none dark:prose-invert">
-                  ${messageContentHtml}
-                </div>
-                <button class="copy-btn text-xs bg-white/90 dark:bg-gray-800/90 hover:bg-gray-100 dark:hover:bg-gray-700 py-1 px-2 rounded text-gray-600 dark:text-gray-300 flex items-center">
-                  <i class="fa-regular fa-copy mr-1"></i> Copier
-                </button>
               </div>
             </div>
           `;
         }
-        messageWrapper.innerHTML = bubbleHtml;
-        // Activation du bouton de copie
-        const copyBtns = messageWrapper.querySelectorAll('.copy-btn');
-        copyBtns.forEach(btn => {
-          btn.addEventListener('click', function() {
-            const textToCopy = this.closest('.message-bubble').querySelector('.prose').innerText || this.closest('.message-bubble').innerText;
-            navigator.clipboard.writeText(textToCopy).then(() => {
-              const originalText = this.innerHTML;
-              this.innerHTML = '<i class="fa-solid fa-check mr-1"></i> Copié';
-              setTimeout(() => { this.innerHTML = originalText; }, 2000);
-            }).catch(err => console.error('Copy failed:', err));
           });
-        });
-        // Activation de la copie pour les blocs de code
-        const codeBlocks = messageWrapper.querySelectorAll('pre');
-        codeBlocks.forEach(pre => {
           const code = pre.querySelector('code');
           if (!code) return;
           if (pre.querySelector('.code-copy-btn')) return;
-          const copyButton = document.createElement('button');
-          copyButton.innerHTML = '<i class="fa-regular fa-copy"></i>';
-          copyButton.className = 'code-copy-btn p-1.5 bg-gray-200/50 dark:bg-gray-700/50 rounded text-gray-600 dark:text-gray-300 hover:bg-gray-300/70 dark:hover:bg-gray-600/70 tooltip';
-          copyButton.setAttribute('aria-label', 'Copier le code');
           const tooltipText = document.createElement('span');
           tooltipText.className = 'tooltip-text !text-xs';
-          tooltipText.textContent = 'Copier le code';
-          copyButton.appendChild(tooltipText);
-          copyButton.addEventListener('click', () => {
             navigator.clipboard.writeText(code.innerText).then(() => {
-              tooltipText.textContent = 'Copié!';
-              copyButton.innerHTML = '<i class="fa-solid fa-check"></i>';
               setTimeout(() => {
-                copyButton.innerHTML = '<i class="fa-regular fa-copy"></i>';
-                copyButton.appendChild(tooltipText);
-                tooltipText.textContent = 'Copier le code';
               }, 2000);
             }).catch(err => {
-              tooltipText.textContent = 'Erreur copie';
-              console.error('Failed to copy code: ', err);
-              setTimeout(() => { tooltipText.textContent = 'Copier le code'; }, 2000);
             });
           });
-          pre.appendChild(copyButton);
         });
-        chatMessages.insertBefore(messageWrapper, loadingIndicator);
-        scrollToBottom();
-      }
-      function escapeHtml(unsafe) {
-        return unsafe
-          .replace(/&/g, "&amp;")
-          .replace(/</g, "&lt;")
-          .replace(/>/g, "&gt;")
-          .replace(/"/g, "&quot;")
-          .replace(/'/g, "&#039;");
-      }
-      // Gestion du cooldown pour le raisonnement avancé
-      function startAdvancedCooldownTimer() {
-        advancedToggle.disabled = true;
-        advancedToggleCooldownEndTime = Date.now() + COOLDOWN_DURATION;
-        const intervalId = setInterval(() => {
-          const now = Date.now();
-          if (now >= advancedToggleCooldownEndTime) {
-            clearInterval(intervalId);
-            advancedCooldownTimerSpan.classList.add('hidden');
-            advancedToggle.disabled = false;
-            advancedToggleCooldownEndTime = 0;
-          } else {
-            const remainingSeconds = Math.ceil((advancedToggleCooldownEndTime - now) / 1000);
-            advancedCooldownTimerSpan.textContent = `(${remainingSeconds}s)`;
-            advancedCooldownTimerSpan.classList.remove('hidden');
-          }
-        }, 1000);
-        const remainingSeconds = Math.ceil((advancedToggleCooldownEndTime - Date.now()) / 1000);
-        advancedCooldownTimerSpan.textContent = `(${remainingSeconds}s)`;
-        advancedCooldownTimerSpan.classList.remove('hidden');
       }
-      // Chargement de l'historique du chat
       async function loadChatHistory() {
-        historyLoadingIndicator.style.display = 'flex';
         try {
           const response = await fetch(API_HISTORY_ENDPOINT);
           if (!response.ok) {
-            let errorMsg = `Erreur serveur (${response.status})`;
-            try {
-              const errData = await response.json();
-              errorMsg = errData.error || errorMsg;
-            } catch (e) {}
             throw new Error(errorMsg);
           }
           const data = await response.json();
-          const messagesToRemove = chatMessages.querySelectorAll(':scope > *:not(#loading-indicator)');
-          messagesToRemove.forEach(el => el.remove());
-          loadingIndicator.classList.add('hidden');
           if (data.success && Array.isArray(data.history)) {
             if (data.history.length === 0) {
-              addMessageToChat('assistant', "Bonjour ! Je suis Mariam, votre assistant IA. Comment puis-je vous aider aujourd'hui ?", true);
             } else {
               data.history.forEach(message => {
-                const isAssistantHtml = message.role === 'assistant';
-                addMessageToChat(message.role, message.text, isAssistantHtml);
               });
             }
-            scrollToBottom(false);
           } else {
-            throw new Error(data.error || "Format de réponse invalide pour l'historique.");
           }
         } catch (error) {
-          displayError(`Impossible de charger l'historique: ${error.message}`);
-          if (chatMessages.querySelectorAll(':scope > *:not(#loading-indicator):not(#history-loading)').length === 0) {
-            addMessageToChat('assistant', "Bonjour ! Je suis Mariam. Je n'ai pas pu charger notre conversation précédente. Comment puis-je vous aider ?", true);
           }
         } finally {
-          historyLoadingIndicator.remove();
-          promptInput.focus();
-          adjustTextareaHeight(promptInput);
         }
       }
-      // Gestion des fichiers
-      function clearFileInput() {
         fileUpload.value = '';
         fileChip.classList.add('hidden');
         fileNameSpan.textContent = '';
         fileNameSpan.title = '';
-        filePreview.innerHTML = '';
-        filePreview.classList.add('hidden');
         previewArea.classList.add('hidden');
       }
       fileUpload.addEventListener('change', () => {
         if (fileUpload.files.length > 0) {
           const file = fileUpload.files[0];
           const name = file.name;
           fileNameSpan.textContent = name;
           fileNameSpan.title = name;
           fileChip.classList.remove('hidden');
-          filePreview.innerHTML = '';
-          if (file.type.startsWith('image/')) {
             const reader = new FileReader();
             reader.onload = (e) => {
-              filePreview.innerHTML = `
-                <div class="file-preview">
-                  <img src="${e.target.result}" alt="Prévisualisation: ${escapeHtml(name)}">
-                </div>`;
-              filePreview.classList.remove('hidden');
-              previewArea.classList.remove('hidden');
-            };
-            reader.onerror = () => {
-              filePreview.innerHTML = `<p class="text-red-500 text-xs text-center p-2">Erreur lecture image</p>`;
-              filePreview.classList.remove('hidden');
               previewArea.classList.remove('hidden');
             };
             reader.readAsDataURL(file);
           } else {
-            filePreview.innerHTML = `
-              <div class="flex items-center justify-center p-3">
-                <div class="bg-gray-100 dark:bg-gray-800 p-3 rounded-lg text-center">
-                  <i class="fa-solid ${getFileIcon(file.type)} text-3xl text-gray-500 dark:text-gray-400 mb-2"></i>
-                  <p class="text-xs text-gray-500 dark:text-gray-400">${formatFileSize(file.size)}</p>
                 </div>
               </div>`;
-            filePreview.classList.remove('hidden');
             previewArea.classList.remove('hidden');
           }
         } else {
           clearFileInput();
         }
       });
-      function getFileIcon(fileType) {
-        if (!fileType) return 'fa-file';
-        if (fileType.includes('pdf')) return 'fa-file-pdf';
-        if (fileType.includes('text')) return 'fa-file-lines';
-        return 'fa-file';
-      }
-      function formatFileSize(bytes) {
-        if (bytes === 0) return '0 octets';
-        const k = 1024;
-        const sizes = ['octets', 'Ko', 'Mo', 'Go', 'To'];
-        const i = Math.floor(Math.log(bytes) / Math.log(k));
-        return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i];
-      }
-      clearFileButton.addEventListener('click', clearFileInput);
-      // Événements pour le textarea
-      promptInput.addEventListener('input', () => {
-        adjustTextareaHeight(promptInput);
       });
       promptInput.addEventListener('keydown', (e) => {
-        if (isComposing) return;
-        const isMobile = window.innerWidth < MOBILE_BREAKPOINT;
-        if (e.key === 'Enter') {
-          if (isMobile && !e.shiftKey) {
-            setTimeout(() => adjustTextareaHeight(promptInput), 0);
-          } else if (!isMobile && !e.shiftKey) {
-            e.preventDefault();
-            if (!sendButton.disabled && (promptInput.value.trim() || fileUpload.files.length > 0)) {
-              chatForm.dispatchEvent(new Event('submit', { bubbles: true, cancelable: true }));
-            }
-          } else if (e.shiftKey) {
-            setTimeout(() => adjustTextareaHeight(promptInput), 0);
-            if (isMobile) {
-              e.preventDefault();
-              if (!sendButton.disabled && (promptInput.value.trim() || fileUpload.files.length > 0)) {
-                chatForm.dispatchEvent(new Event('submit', { bubbles: true, cancelable: true }));
-              }
-            }
-          }
-        }
-      });
-      promptInput.addEventListener('compositionstart', () => { isComposing = true; });
-      promptInput.addEventListener('compositionend', () => {
-        isComposing = false;
-        setTimeout(() => adjustTextareaHeight(promptInput), 0);
       });
-      adjustTextareaHeight(promptInput);
-      // Soumission du formulaire
       chatForm.addEventListener('submit', async (e) => {
         e.preventDefault();
-        const prompt = promptInput.value.trim();
         const file = fileUpload.files[0];
         const useWebSearch = webSearchToggle.checked;
         const useAdvanced = advancedToggle.checked;
-        if (sendButton.disabled) return;
-        if (!prompt && !file) {
           promptInput.focus();
           return;
         }
-        errorMessageDiv.classList.add('hidden');
         if (useAdvanced) {
           const now = Date.now();
           if (advancedToggleCooldownEndTime > 0 && now < advancedToggleCooldownEndTime) {
             const remainingSeconds = Math.ceil((advancedToggleCooldownEndTime - now) / 1000);
-            displayError(`Le raisonnement avancé est disponible dans ${remainingSeconds} seconde(s).`);
             return;
           }
         }
-        let userMessageText = prompt;
         if (file && file.name) {
-          userMessageText = prompt ? `${prompt}\n[Fichier: ${file.name}]` : `[Fichier joint: ${file.name}]`;
         }
-        addMessageToChat('user', userMessageText);
         const formData = new FormData();
-        formData.append('prompt', prompt);
         formData.append('web_search', useWebSearch);
         formData.append('advanced_reasoning', useAdvanced);
         if (file) {
           formData.append('file', file);
         }
         promptInput.value = '';
-        adjustTextareaHeight(promptInput);
         clearFileInput();
         if (useAdvanced) {
-          startAdvancedCooldownTimer();
-          advancedToggle.checked = false;
         }
-        webSearchToggle.checked = false;
-        showLoading(true);
         try {
           const response = await fetch(API_CHAT_ENDPOINT, { method: 'POST', body: formData });
-          const data = await response.json();
           if (!response.ok) {
-            throw new Error(data.error || `Erreur serveur: ${response.status} ${response.statusText}`);
           }
           if (data.success && data.message) {
-            addMessageToChat('assistant', data.message, true);
           } else {
-            throw new Error(data.error || "Réponse invalide ou vide du serveur.");
           }
         } catch (error) {
-          console.error("Chat Error:", error);
-          addMessageToChat('assistant', `<p class="text-red-600 dark:text-red-400">Désolé, une erreur est survenue :<br>${escapeHtml(error.message)}</p>`, true);
         } finally {
-          showLoading(false);
-          promptInput.focus();
         }
       });
-      // Effacement de la conversation
       clearForm.addEventListener('submit', async (e) => {
         e.preventDefault();
         const confirmDialog = document.createElement('div');
-        confirmDialog.className = 'fixed inset-0 bg-black/50 flex items-center justify-center z-50 p-4';
         confirmDialog.innerHTML = `
-          <div class="bg-white dark:bg-gray-800 p-6 rounded-lg shadow-xl max-w-sm w-full animate-[message-fade-in_0.2s_ease-out]">
-            <h3 class="text-lg font-semibold mb-3 text-gray-900 dark:text-gray-100">Confirmer l'effacement</h3>
-            <p class="text-sm text-gray-600 dark:text-gray-300 mb-5">Êtes-vous sûr de vouloir effacer toute la conversation ? Cette action est irréversible.</p>
             <div class="flex justify-end space-x-3">
-              <button type="button" id="cancel-clear" class="px-4 py-2 text-sm font-medium text-gray-700 dark:text-gray-300 bg-gray-100 dark:bg-gray-700 rounded hover:bg-gray-200 dark:hover:bg-gray-600 transition-colors focus:outline-none focus:ring-2 focus:ring-gray-400">
                 Annuler
               </button>
-              <button type="button" id="confirm-clear" class="px-4 py-2 text-sm font-medium text-white bg-red-600 rounded hover:bg-red-700 transition-colors focus:outline-none focus:ring-2 focus:ring-red-500">
                 Effacer
               </button>
             </div>
           </div>
         `;
-        const closeModal = () => {
-          if (document.body.contains(confirmDialog)) {
-            document.body.removeChild(confirmDialog);
-            document.body.style.overflow = '';
-          }
         };
-        confirmDialog.querySelector('#cancel-clear').addEventListener('click', closeModal);
-        confirmDialog.querySelector('#confirm-clear').addEventListener('click', async () => {
-          closeModal();
-          const clearButton = e.target.querySelector('button[type="submit"]');
           const originalButtonContent = clearButton.innerHTML;
           clearButton.disabled = true;
-          clearButton.innerHTML = '<i class="fa-solid fa-spinner fa-spin mr-1.5"></i><span class="hidden sm:inline">Effacement...</span>';
           try {
-            const response = await fetch(CLEAR_ENDPOINT, {
               method: 'POST',
-              headers: {
-                'X-Requested-With': 'XMLHttpRequest'
-              }
             });
             const data = await response.json();
             if (response.ok && data.success) {
-              const messagesToRemove = chatMessages.querySelectorAll(':scope > *:not(#loading-indicator)');
               messagesToRemove.forEach(el => el.remove());
-              addMessageToChat('assistant', "Conversation effacée. Comment puis-je vous aider maintenant ?", true);
-              errorMessageDiv.classList.add('hidden');
             } else {
-              throw new Error(data.error || "Impossible d'effacer la conversation.");
             }
           } catch (error) {
-            console.error("Clear Error:", error);
-            displayError(`Erreur lors de l'effacement: ${error.message}`);
           } finally {
-            clearButton.innerHTML = originalButtonContent;
             clearButton.disabled = false;
-            promptInput.focus();
           }
         });
         document.body.appendChild(confirmDialog);
-        document.body.style.overflow = 'hidden';
-        confirmDialog.querySelector('#cancel-clear').focus();
       });
-      // Initialisation
-      loadChatHistory();
-      // Observer pour les tableaux Markdown
-      const observeMarkdownTables = () => {
-        const observer = new MutationObserver(mutations => {
-          mutations.forEach(mutation => {
-            if (mutation.addedNodes.length) {
-              mutation.addedNodes.forEach(node => {
-                if (node.nodeType === 1) {
-                  const tables = node.matches('.prose table') ? [node] : node.querySelectorAll('.prose table');
-                  tables.forEach(table => {
-                    if (!table.closest('.table-wrapper')) {
-                      const wrapper = document.createElement('div');
-                      wrapper.className = 'table-wrapper';
-                      table.parentNode.insertBefore(wrapper, table);
-                      wrapper.appendChild(table);
-                    }
-                  });
-                }
-              });
-            }
-          });
-        });
-        observer.observe(chatMessages, { childList: true, subtree: true });
-      };
-      observeMarkdownTables();
-      // Gestion du changement de thème selon le système
-      const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)');
-      const handleSchemeChange = (e) => {
-        if (!localStorage.getItem('theme')) {
-          if (e.matches) {
-            document.documentElement.classList.add('dark');
-          } else {
-            document.documentElement.classList.remove('dark');
           }
-        }
-      };
-      prefersDarkScheme.addEventListener('change', handleSchemeChange);
-    });
   </script>
 </body>
-</html>

 <!DOCTYPE html>
+<html lang="fr" class="h-full">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>Mariam AI ✨ Assistant IA</title>
   <!-- Tailwind CSS via CDN -->
   <script src="https://cdn.tailwindcss.com?plugins=forms,typography"></script>
   <!-- Font Awesome pour les icônes -->
+  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css" integrity="sha512-DTOQO9RWCH3ppGqcWaEA1BIZOC6xxalwEsw9c2QQeAIftl+Vegovlnee1c9QX4TctnWMn13TZye+giMm8e2LwA==" crossorigin="anonymous" referrerpolicy="no-referrer" />
   <!-- Google Fonts -->
   <link rel="preconnect" href="https://fonts.googleapis.com">
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet">
   <!-- Favicon (Emoji amélioré) -->
   <link rel="icon" href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>✨</text></svg>">
   <script>
+    // Tailwind CSS Configuration
     tailwind.config = {
       darkMode: 'class',
       theme: {
         extend: {
           fontFamily: {
+            sans: ['Inter', 'system-ui', '-apple-system', 'BlinkMacSystemFont', '"Segoe UI"', 'Roboto', '"Helvetica Neue"', 'Arial', '"Noto Sans"', 'sans-serif', '"Apple Color Emoji"', '"Segoe UI Emoji"', '"Segoe UI Symbol"', '"Noto Color Emoji"'],
+            mono: ['"JetBrains Mono"', 'ui-monospace', 'SFMono-Regular', 'Menlo', 'Monaco', 'Consolas', '"Liberation Mono"', '"Courier New"', 'monospace']
           },
           colors: {
+            primary: { DEFAULT: '#0ea5e9', 50: '#f0f9ff', 100: '#e0f2fe', 200: '#bae6fd', 300: '#7dd3fc', 400: '#38bdf8', 500: '#0ea5e9', 600: '#0284c7', 700: '#0369a1', 800: '#075985', 900: '#0c4a6e', 950: '#082f49' },
+            secondary: { DEFAULT: '#64748b', 50: '#f8fafc', 100: '#f1f5f9', 200: '#e2e8f0', 300: '#cbd5e1', 400: '#94a3b8', 500: '#64748b', 600: '#475569', 700: '#334155', 800: '#1e293b', 900: '#0f172a', 950: '#020617' },
+            accent: { DEFAULT: '#d946ef', 50: '#fdf4ff', 100: '#fae8ff', 200: '#f5d0fe', 300: '#f0abfc', 400: '#e879f9', 500: '#d946ef', 600: '#c026d3', 700: '#a21caf', 800: '#86198f', 900: '#701a75', 950: '#4a044e' }
+          },
+          animation: {
+            'fade-in': 'fadeIn 0.3s ease-out forwards',
+            'slide-up': 'slideUp 0.3s ease-out forwards',
+            'pulse-slow': 'pulse 2.5s cubic-bezier(0.4, 0, 0.6, 1) infinite',
+            'typing-dot-pulse': 'typingDotPulse 1.4s infinite ease-in-out both'
           },
+          keyframes: {
+            fadeIn: { '0%': { opacity: '0' }, '100%': { opacity: '1' } },
+            slideUp: { '0%': { opacity: '0', transform: 'translateY(10px)' }, '100%': { opacity: '1', transform: 'translateY(0)' } },
+            typingDotPulse: {
+              '0%, 80%, 100%': { transform: 'scale(0)' },
+              '40%': { transform: 'scale(1.0)' }
+            }
+          },
+          typography: (theme) => ({
+            DEFAULT: {
+              css: {
+                '--tw-prose-body': theme('colors.secondary[700]'),
+                '--tw-prose-headings': theme('colors.secondary[900]'),
+                '--tw-prose-lead': theme('colors.secondary[600]'),
+                '--tw-prose-links': theme('colors.primary[600]'),
+                '--tw-prose-bold': theme('colors.secondary[900]'),
+                '--tw-prose-counters': theme('colors.secondary[500]'),
+                '--tw-prose-bullets': theme('colors.secondary[300]'),
+                '--tw-prose-hr': theme('colors.secondary[200]'),
+                '--tw-prose-quotes': theme('colors.secondary[900]'),
+                '--tw-prose-quote-borders': theme('colors.secondary[200]'),
+                '--tw-prose-captions': theme('colors.secondary[500]'),
+                '--tw-prose-code': theme('colors.secondary[900]'),
+                '--tw-prose-pre-code': theme('colors.secondary[700]'),
+                '--tw-prose-pre-bg': theme('colors.secondary[100]'),
+                '--tw-prose-th-borders': theme('colors.secondary[300]'),
+                '--tw-prose-td-borders': theme('colors.secondary[200]'),
+                '--tw-prose-invert-body': theme('colors.secondary[300]'),
+                '--tw-prose-invert-headings': theme('colors.white'),
+                '--tw-prose-invert-lead': theme('colors.secondary[400]'),
+                '--tw-prose-invert-links': theme('colors.primary[400]'),
+                '--tw-prose-invert-bold': theme('colors.white'),
+                '--tw-prose-invert-counters': theme('colors.secondary[400]'),
+                '--tw-prose-invert-bullets': theme('colors.secondary[600]'),
+                '--tw-prose-invert-hr': theme('colors.secondary[700]'),
+                '--tw-prose-invert-quotes': theme('colors.secondary[100]'),
+                '--tw-prose-invert-quote-borders': theme('colors.secondary[700]'),
+                '--tw-prose-invert-captions': theme('colors.secondary[400]'),
+                '--tw-prose-invert-code': theme('colors.white'),
+                '--tw-prose-invert-pre-code': theme('colors.secondary[300]'),
+                '--tw-prose-invert-pre-bg': theme('colors.secondary[800]'),
+                '--tw-prose-invert-th-borders': theme('colors.secondary[600]'),
+                '--tw-prose-invert-td-borders': theme('colors.secondary[700]'),
+                'code::before': { content: 'none' },
+                'code::after': { content: 'none' },
+                'pre': {
+                  borderRadius: theme('borderRadius.lg'),
+                  boxShadow: theme('boxShadow.sm'),
+                  paddingTop: theme('spacing.4'),
+                  paddingBottom: theme('spacing.4'),
+                  paddingLeft: theme('spacing.5'),
+                  paddingRight: theme('spacing.5'),
+                },
+                 'table': { fontSize: theme('fontSize.sm') },
+                 'thead': { borderBottomWidth: '1px', borderBottomColor: 'var(--tw-prose-th-borders)' },
+                 'tbody tr': { borderBottomWidth: '1px', borderBottomColor: 'var(--tw-prose-td-borders)' },
+                 'td, th': { padding: theme('spacing.2') + ' ' + theme('spacing.3') },
+              },
+            },
+          }),
         }
       }
     }
   </script>
   <style>
+    /* Base Styles & Layout */
+    html { scroll-behavior: smooth; }
+    body { @apply font-sans antialiased transition-colors duration-300 ease-in-out; }
+    /* Full height layout using flex */
+    .main-layout {
+      display: flex;
+      flex-direction: column;
+      min-height: 100vh; /* Use min-height to be safe, but 100vh is often fine with this structure */
+      max-height: 100vh;
+      overflow: hidden; /* Prevent body scroll */
     }
+    #chat-messages {
+      flex-grow: 1; /* Take available space */
+      overflow-y: auto; /* Enable vertical scrolling */
+      -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
+      overscroll-behavior-y: contain; /* Prevent pull-to-refresh on scroll */
+      scrollbar-gutter: stable; /* Prevent layout shifts when scrollbar appears/disappears */
     }
+    /* Scrollbar Styling */
+    ::-webkit-scrollbar { width: 6px; height: 6px; }
+    ::-webkit-scrollbar-track { background: transparent; }
+    ::-webkit-scrollbar-thumb { @apply bg-secondary-300 dark:bg-secondary-700 rounded-full; }
+    ::-webkit-scrollbar-thumb:hover { @apply bg-secondary-400 dark:bg-secondary-600; }
+    /* Firefox scrollbar */
+    html { scrollbar-color: theme('colors.secondary.300') transparent; scrollbar-width: thin; }
+    .dark html { scrollbar-color: theme('colors.secondary.700') transparent; }
+    /* Message Bubbles */
     .message-bubble {
       position: relative;
       max-width: 85%;
+      border-radius: 1.125rem;
+      padding: 0.75rem 1.125rem;
+      line-height: 1.6;
+      box-shadow: 0 2px 4px rgba(0,0,0,0.05);
       transition: transform 0.2s ease, box-shadow 0.2s ease;
+      word-wrap: break-word;
+      overflow-wrap: break-word;
     }
+    .message-bubble:hover { box-shadow: 0 5px 10px rgba(0,0,0,0.07); }
+    .dark .message-bubble { box-shadow: 0 2px 4px rgba(0,0,0,0.15); }
+    .dark .message-bubble:hover { box-shadow: 0 5px 12px rgba(0,0,0,0.2); }
     .user-message {
+      border-bottom-right-radius: 0.25rem;
       align-self: flex-end;
+      @apply bg-gradient-to-br from-primary-500 to-primary-600 text-white;
     }
+    .assistant-message-wrapper {
       align-self: flex-start;
+      display: flex;
+      gap: 0.625rem;
+      max-width: 85%;
     }
+    .assistant-avatar {
+       @apply w-8 h-8 rounded-full bg-gradient-to-br from-primary-100 to-primary-200 dark:from-primary-800 dark:to-primary-900 flex items-center justify-center flex-shrink-0 shadow-sm text-primary-700;
+       font-size: 1.1rem;
     }
+    .dark .assistant-avatar { @apply text-primary-200; }
+    .assistant-message {
+      border-bottom-left-radius: 0.25rem;
+      @apply bg-white dark:bg-secondary-800 text-secondary-800 dark:text-secondary-100 border border-secondary-200 dark:border-secondary-700;
     }
+    /* Message animation */
+    .message-animate { animation: slideUp 0.3s ease-out forwards; }
+    /* Typing Indicator */
+    .typing-indicator { display: flex; align-items: center; gap: 0.2rem; }
     .typing-dot {
+      @apply w-2 h-2 rounded-full bg-current opacity-70;
+      animation: typingDotPulse 1.4s infinite ease-in-out both;
     }
+    .typing-dot:nth-child(1) { animation-delay: -0.32s; }
+    .typing-dot:nth-child(2) { animation-delay: -0.16s; }
+    /* Tooltip Styling */
+    .tooltip { position: relative; display: inline-block; } /* Ensure tooltip works on various elements */
     .tooltip .tooltip-text {
+      @apply invisible opacity-0 transition-opacity duration-200 ease-in-out;
+      @apply bg-secondary-800 dark:bg-secondary-600 text-white dark:text-secondary-100 text-xs font-medium;
+      @apply rounded-md px-2 py-1 shadow-lg whitespace-nowrap;
       position: absolute;
+      z-index: 20;
+      bottom: 130%;
       left: 50%;
       transform: translateX(-50%);
       pointer-events: none;
     }
     .tooltip .tooltip-text::after {
+      content: ""; position: absolute; top: 100%; left: 50%; margin-left: -4px;
+      border-width: 4px; border-style: solid;
+      @apply border-transparent border-t-secondary-800 dark:border-t-secondary-600;
     }
+    .tooltip:hover .tooltip-text,
+    .tooltip:focus-within .tooltip-text { @apply visible opacity-100; }
+    /* Copy Button (Message & Code) */
     .copy-btn {
+      @apply absolute top-2 right-2 p-1.5 rounded-md text-secondary-500 dark:text-secondary-400;
+      @apply bg-white/70 dark:bg-secondary-700/70 backdrop-blur-sm;
+      @apply opacity-0 group-hover:opacity-100 focus:opacity-100 transition-opacity duration-200;
+      @apply hover:bg-secondary-100 dark:hover:bg-secondary-600 hover:text-primary-600 dark:hover:text-primary-300;
+      z-index: 5;
     }
+    .copy-btn i { font-size: 0.8rem; }
+    .code-copy-btn {
+      @apply absolute top-2 right-2 p-1.5 rounded-md text-secondary-500 dark:text-secondary-400;
+      @apply bg-secondary-200/50 dark:bg-secondary-900/50 backdrop-blur-sm;
+      @apply opacity-0 group-hover:opacity-100 focus:opacity-100 transition-opacity duration-200;
+      @apply hover:bg-secondary-300/70 dark:hover:bg-secondary-800/70 hover:text-primary-600 dark:hover:text-primary-300;
+      z-index: 5;
     }
+    .code-copy-btn i { font-size: 0.8rem; }
+    /* File Preview */
+    .file-preview-wrapper {
+      @apply relative max-w-[250px] mx-auto my-2 rounded-lg overflow-hidden shadow-md border border-secondary-200 dark:border-secondary-700;
       transition: transform 0.2s ease;
     }
+    .file-preview-wrapper:hover { transform: scale(1.03); }
+    .file-preview-wrapper img { @apply block w-full h-auto object-cover; }
+    .file-info-overlay {
+      @apply absolute bottom-0 left-0 right-0 p-2 bg-gradient-to-t from-black/60 to-transparent text-white text-xs;
+      pointer-events: none;
     }
+    .file-info-overlay span { @apply block truncate; }
+    /* File Chip */
     .chip {
+      @apply inline-flex items-center bg-primary-100 dark:bg-primary-900/60 rounded-full py-1 pl-2.5 pr-1 text-xs font-medium text-primary-700 dark:text-primary-200;
       transition: all 0.2s ease;
+      max-width: 150px;
     }
+    .chip .chip-icon { @apply mr-1.5 text-primary-500 dark:text-primary-400; font-size: 0.8em;}
+    .chip .chip-text { @apply truncate flex-1 mr-1; }
     .chip .chip-close {
+      @apply ml-auto w-4 h-4 flex items-center justify-center rounded-full bg-primary-200 dark:bg-primary-700/80 text-primary-600 dark:text-primary-100 cursor-pointer transition-colors;
     }
+    .chip .chip-close:hover { @apply bg-primary-300 dark:bg-primary-600; }
+    .chip .chip-close i { font-size: 0.6rem; }
+    /* Toggle Switch */
+    .toggle-switch { position: relative; display: inline-block; width: 36px; height: 20px; }
+    .toggle-switch input { opacity: 0; width: 0; height: 0; }
     .toggle-slider {
+      position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0;
+      @apply bg-secondary-300 dark:bg-secondary-600 transition-colors duration-300 ease-in-out rounded-full;
     }
     .toggle-slider:before {
+      position: absolute; content: ""; height: 14px; width: 14px; left: 3px; bottom: 3px;
+      @apply bg-white transition-transform duration-300 ease-in-out rounded-full shadow;
     }
+    input:checked + .toggle-slider { @apply bg-primary-500 dark:bg-primary-600; }
+    input:focus-visible + .toggle-slider { @apply ring-2 ring-primary-400 ring-offset-1 ring-offset-secondary-50 dark:ring-offset-secondary-950; }
+    input:checked + .toggle-slider:before { transform: translateX(16px); }
+    input:disabled + .toggle-slider { @apply opacity-50 cursor-not-allowed; }
+    /* Chat Input Area */
     .chat-textarea {
+      @apply block w-full resize-none overflow-y-auto bg-transparent dark:text-secondary-100 placeholder-secondary-400 dark:placeholder-secondary-500;
+      @apply transition-all duration-200 ease-in-out;
       min-height: 44px;
+      max-height: 180px;
       line-height: 1.5;
       padding-top: 0.625rem;
       padding-bottom: 0.625rem;
       padding-left: 1rem;
+      padding-right: 3.5rem;
+      border: none;
+      outline: none;
+      box-shadow: none;
     }
+    .chat-input-container {
+      @apply relative flex items-end bg-white dark:bg-secondary-900 rounded-full border border-secondary-300 dark:border-secondary-700 shadow-sm transition-all duration-200 ease-in-out;
     }
+     .chat-input-container:focus-within { @apply ring-2 ring-primary-400; }
+    .send-button-wrapper { @apply absolute right-1.5 bottom-[5px]; }
+    #send-button {
+      @apply w-9 h-9 rounded-full flex items-center justify-center transition-all duration-200 ease-in-out;
+      @apply bg-primary-500 text-white hover:bg-primary-600 dark:bg-primary-600 dark:hover:bg-primary-500;
+      @apply focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-400 focus-visible:ring-offset-1 focus-visible:ring-offset-white dark:focus-visible:ring-offset-secondary-900;
+      @apply disabled:opacity-50 disabled:cursor-not-allowed disabled:bg-secondary-300 dark:disabled:bg-secondary-700;
+    }
+    #send-button i { font-size: 0.95rem; }
+    /* Markdown Table Wrapper */
+    .table-wrapper {
+        @apply w-full overflow-x-auto my-4 rounded-lg border border-secondary-200 dark:border-secondary-700 shadow-sm;
     }
+    .dark .table-wrapper { border-color: var(--tw-prose-invert-td-borders); }
+    /* Error Banner */
+     #error-message {
+        @apply bg-red-50 dark:bg-red-900/30 border-l-4 border-red-500 dark:border-red-600 text-red-800 dark:text-red-200 p-4 rounded-r-md shadow-md transition-all duration-300 ease-in-out;
+        max-height: 500px; /* For transition */
+        overflow: hidden;
+     }
+     #error-message.hidden {
+         @apply max-h-0 p-0 border-0 opacity-0;
+     }
+     #error-message .icon { @apply text-red-500 dark:text-red-400; }
+     #error-message button {
+         @apply text-red-600 dark:text-red-300 hover:text-red-800 dark:hover:text-red-100 focus:outline-none focus-visible:ring-2 focus-visible:ring-red-400 rounded-sm p-0.5;
+     }
+     /* History Loader */
+     #history-loading .loader-icon { animation: spin 1s linear infinite; }
+     @keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
+     /* Focus Visible for Accessibility */
+     *:focus-visible {
+        outline: 2px solid theme('colors.primary.400');
+        outline-offset: 2px;
+        border-radius: 2px;
+     }
+      .chat-input-container:focus-within,
+      #send-button:focus-visible,
+      .toggle-switch input:focus-visible + .toggle-slider,
+      #error-message button:focus-visible {
+         outline: none;
+      }
+    /* Responsive Adjustments */
+     @media (max-width: 640px) {
+        body { font-size: 0.95rem; }
+        .message-bubble { max-width: 92%; padding: 0.6rem 1rem; }
+        .assistant-avatar { width: 28px; height: 28px; font-size: 1rem; }
+        .assistant-message-wrapper { gap: 0.5rem; max-width: 92%;}
+        .chat-textarea { min-height: 40px; max-height: 120px; padding-left: 0.875rem; padding-right: 3rem; }
+        .send-button-wrapper { right: 0.375rem; bottom: 4px; }
+        #send-button { width: 32px; height: 32px; }
+        #send-button i { font-size: 0.85rem; }
+        .options-bar { flex-direction: column; align-items: flex-start; gap: 0.5rem; padding: 0.5rem 0.75rem; }
+        .options-group { justify-content: space-between; width: 100%; }
+        .chip { max-width: 120px; }
+        .prose { font-size: 0.9rem; }
+        .prose table { font-size: 0.8rem; }
+        .prose td, .prose th { padding: 0.3rem 0.5rem; }
+        .tooltip .tooltip-text { font-size: 0.7rem; }
+        .header-action-text { display: none; }
+        .header-clear-button { padding-left: 0.5rem; padding-right: 0.5rem; }
+        .header-clear-button i { margin-right: 0; }
+     }
   </style>
 </head>
+<body class="h-full bg-secondary-50 text-secondary-900 dark:bg-secondary-950 dark:text-secondary-100">
+  <div class="main-layout">
+    <!-- Header -->
+    <header class="bg-white dark:bg-secondary-900 border-b border-secondary-200 dark:border-secondary-800 shadow-sm py-2 px-4 sm:px-6 sticky top-0 z-20 transition-colors duration-300">
+      <div class="max-w-5xl mx-auto flex justify-between items-center h-12">
+        <!-- Logo & Title -->
+        <div class="flex items-center space-x-3">
+          <img src="https://mariam-241.vercel.app/static/image/logoboma.png" alt="Logo Mariam AI" class="h-8 sm:h-9 object-contain flex-shrink-0">
+          <h1 class="text-lg sm:text-xl font-semibold text-secondary-800 dark:text-secondary-100 truncate">Mariam AI</h1>
+        </div>
+        <!-- Actions -->
+        <div class="flex items-center space-x-2 sm:space-x-3">
+          <!-- Theme Toggle Button -->
+          <button id="theme-toggle" class="tooltip p-2 rounded-full text-secondary-600 dark:text-secondary-400 hover:bg-secondary-100 dark:hover:bg-secondary-800 hover:text-primary-600 dark:hover:text-primary-300 transition-colors duration-200 focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-400" aria-label="Changer de thème">
+            <i class="fa-solid fa-moon text-lg hidden dark:inline"></i>
+            <i class="fa-solid fa-sun text-lg dark:hidden"></i>
+            <span class="tooltip-text">Mode Sombre / Clair</span>
           </button>
+          <!-- Clear Chat Button -->
+          <form action="/clear" method="POST" id="clear-form">
+            <button type="submit" class="tooltip header-clear-button flex items-center bg-red-100 hover:bg-red-200 dark:bg-red-900/50 dark:hover:bg-red-800/70 text-red-600 dark:text-red-300 dark:hover:text-red-200 text-xs font-semibold py-1.5 px-2 sm:px-3 rounded-full transition duration-200 focus:outline-none focus-visible:ring-2 focus-visible:ring-red-400" aria-label="Effacer la conversation">
+              <i class="fa-solid fa-eraser mr-0 sm:mr-1.5 text-sm"></i>
+              <span class="header-action-text">Effacer</span>
+              <span class="tooltip-text">Effacer la conversation</span>
+            </button>
+          </form>
         </div>
       </div>
+    </header>
+    <!-- Main Content Area -->
+    <main class="flex-grow overflow-hidden flex flex-col">
+      <!-- Chat Messages Container -->
+      <section id="chat-messages" class="flex-grow p-4 sm:p-6 space-y-5 overflow-y-auto">
+        <!-- History Loading Indicator -->
+        <div id="history-loading" class="text-center py-10 animate-fade-in">
+          <div class="inline-flex items-center px-4 py-2 bg-secondary-100 text-secondary-600 dark:bg-secondary-800 dark:text-secondary-300 rounded-lg shadow-sm text-sm">
+            <svg class="loader-icon h-4 w-4 mr-2 text-primary-500" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor">
+              <path stroke-linecap="round" stroke-linejoin="round" d="M16.023 9.348h4.992v-.001m0 0l-3.181 3.183a8.25 8.25 0 01-13.803-3.7M4.031 9.865a8.25 8.25 0 0113.803-3.7l3.181 3.182m0-4.991v4.99"></path>
+            </svg>
+            <span>Chargement de la conversation...</span>
+          </div>
         </div>
+        <!-- AI Response Loading Indicator (kept in HTML for initial structure) -->
+        <div id="loading-indicator" class="assistant-message-wrapper hidden message-animate">
+          <div class="assistant-avatar">✨</div>
+          <div class="message-bubble assistant-message flex items-center space-x-2">
+            <span class="text-sm italic">Mariam réfléchit</span>
+            <div class="typing-indicator">
+              <span class="typing-dot"></span>
+              <span class="typing-dot"></span>
+              <span class="typing-dot"></span>
+            </div>
           </div>
         </div>
+      </section>
+    </main>
+    <!-- Footer: Input Area and Options -->
+    <footer class="border-t border-secondary-200 dark:border-secondary-800 bg-secondary-100 dark:bg-secondary-900/80 backdrop-blur-sm sticky bottom-0 z-10 transition-colors duration-300">
+      <!-- Error Banner -->
+      <div id="error-message" class="hidden" role="alert" aria-hidden="true">
+        <div class="flex items-start">
+           <div class="flex-shrink-0 mt-0.5">
+               <i class="fa-solid fa-circle-exclamation icon text-lg"></i>
+           </div>
+           <div class="ml-3 flex-grow">
+               <p class="text-sm font-medium" id="error-text">Message d'erreur.</p>
+           </div>
+           <div class="ml-auto pl-3">
+               <button type="button" class="-mx-1.5 -my-1.5 p-1.5" id="dismiss-error" aria-label="Fermer l'alerte">
+                   <i class="fa-solid fa-xmark"></i>
+               </button>
+           </div>
         </div>
       </div>
+      <!-- Preview Area + Options -->
+      <div class="px-4 py-2 space-y-2">
+        <!-- File Preview (if present) -->
+        <div id="preview-area" class="hidden">
+           <!-- File preview content will be injected here by JS -->
+        </div>
+        <!-- Options Bar -->
+        <div class="options-bar flex items-center justify-between flex-wrap gap-x-4 gap-y-2 text-xs sm:text-sm text-secondary-700 dark:text-secondary-300">
+          <!-- Left Options Group -->
+          <div class="options-group flex items-center space-x-3 sm:space-x-4 flex-wrap gap-y-2">
+             <!-- Web Search Toggle -->
+             <label class="flex items-center cursor-pointer tooltip group">
+               <span class="toggle-switch">
+                 <input type="checkbox" id="web_search_toggle" name="web_search" value="true" class="sr-only">
+                 <span class="toggle-slider"></span>
+               </span>
+               <span class="ml-2 font-medium group-hover:text-primary-600 dark:group-hover:text-primary-300 transition-colors">
+                 <i class="fa-solid fa-globe mr-1 opacity-70"></i>
+                 <span class="hidden sm:inline">Recherche Web</span>
+               </span>
+               <span class="tooltip-text">Activer la recherche web</span>
+             </label>
+             <!-- Advanced Reasoning Toggle -->
+             <label class="flex items-center cursor-pointer tooltip group">
+               <span class="toggle-switch">
+                 <input type="checkbox" id="advanced_reasoning_toggle" name="advanced_reasoning" value="true" class="sr-only">
+                 <span class="toggle-slider"></span>
+               </span>
+               <span class="ml-2 font-medium text-accent-700 dark:text-accent-400 group-hover:text-accent-600 dark:group-hover:text-accent-300 transition-colors">
+                 <i class="fa-solid fa-brain mr-1 opacity-70"></i>
+                 <span class="hidden sm:inline">Avancé</span>
+                 <span id="advanced-cooldown-timer" class="text-xs ml-1 hidden opacity-80"></span>
+               </span>
+               <span class="tooltip-text">Raisonnement avancé (1 fois/min)</span>
+             </label>
+          </div>
+          <!-- Right Options Group (File) -->
+          <div class="options-group flex items-center space-x-2">
+             <!-- File Chip (if attached) -->
+             <div id="file-chip" class="chip hidden animate-fade-in">
+               <i class="fa-solid fa-paperclip chip-icon"></i>
+               <span id="file-name" class="chip-text"></span>
+               <button id="clear-file" class="chip-close tooltip" aria-label="Retirer le fichier">
+                 <i class="fa-solid fa-xmark"></i>
+                 <span class="tooltip-text !bottom-full !mb-1">Retirer</span>
+               </button>
+             </div>
+             <!-- File Upload Button -->
+             <label for="file_upload" class="tooltip cursor-pointer p-2 rounded-full text-secondary-600 dark:text-secondary-400 hover:bg-secondary-200 dark:hover:bg-secondary-700 hover:text-primary-600 dark:hover:text-primary-300 transition-colors duration-200 focus-within:ring-2 focus-within:ring-primary-400">
+               <i class="fa-solid fa-paperclip"></i>
+               <input type="file" id="file_upload" name="file" class="hidden" accept=".txt,.pdf,.png,.jpg,.jpeg,.md,.csv,.json,.xml,.docx,.pptx,.xlsx">
+               <span class="tooltip-text">Joindre fichier (texte, pdf, image, doc...)</span>
+             </label>
+          </div>
+        </div>
       </div>
+      <!-- Chat Form -->
+      <form id="chat-form" class="p-3 sm:p-4 pt-0">
+        <div class="chat-input-container">
           <textarea
             id="prompt"
             name="prompt"
+            class="chat-textarea"
             placeholder="Posez votre question à Mariam..."
             autocomplete="off"
+            rows="1"
+            aria-label="Votre message"></textarea>
           <div class="send-button-wrapper">
             <button
               type="submit"
               id="send-button"
+              title="Envoyer (Entrée)"
+              aria-label="Envoyer le message">
+              <i class="fa-solid fa-arrow-up"></i>
             </button>
           </div>
         </div>
+         <div class="text-xs text-center mt-2 text-secondary-500 dark:text-secondary-400">
+           <kbd class="px-1.5 py-0.5 bg-secondary-200 dark:bg-secondary-700 rounded border border-secondary-300 dark:border-secondary-600 font-sans font-semibold">Entrée</kbd> envoyer
+           <span class="mx-1">•</span>
+           <kbd class="px-1.5 py-0.5 bg-secondary-200 dark:bg-secondary-700 rounded border border-secondary-300 dark:border-secondary-600 font-sans font-semibold">Shift+Entrée</kbd> nouvelle ligne
+         </div>
       </form>
+    </footer>
+    <!-- Confirmation Modal for Clear Chat -->
+    <!-- This modal is dynamically added/removed by JS -->
+    <!-- Example Structure:
+    <div class="fixed inset-0 bg-black/60 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in" role="dialog" aria-modal="true" aria-labelledby="confirm-dialog-title">
+      <div class="bg-white dark:bg-secondary-800 p-6 rounded-lg shadow-xl max-w-sm w-full transform transition-transform duration-300 scale-95 opacity-0" data-dialog-content>
+        <h3 id="confirm-dialog-title" class="text-lg font-semibold mb-3 text-secondary-900 dark:text-secondary-100">Vider la conversation ?</h3>
+        <p class="text-sm text-secondary-600 dark:text-secondary-300 mb-6">Toute l'historique de cette session sera définitivement effacé.</p>
+        <div class="flex justify-end space-x-3">
+          <button type="button" data-cancel class="..."> Annuler </button>
+          <button type="button" data-confirm class="..."> Effacer </button>
+        </div>
+      </div>
     </div>
+    -->
+  </div>
   <!-- Scripts -->
   <script>
     document.addEventListener('DOMContentLoaded', () => {
+      // --- DOM Elements Selection ---
       const chatForm = document.getElementById('chat-form');
       const promptInput = document.getElementById('prompt');
       const chatMessages = document.getElementById('chat-messages');
       const fileChip = document.getElementById('file-chip');
       const fileNameSpan = document.getElementById('file-name');
       const clearFileButton = document.getElementById('clear-file');
       const previewArea = document.getElementById('preview-area');
       const sendButton = document.getElementById('send-button');
       const clearForm = document.getElementById('clear-form');
       const advancedToggle = document.getElementById('advanced_reasoning_toggle');
       const advancedCooldownTimerSpan = document.getElementById('advanced-cooldown-timer');
       const themeToggleBtn = document.getElementById('theme-toggle');
+      const htmlElement = document.documentElement;
+      // --- Constants and Variables ---
+      const API_CHAT_ENDPOINT = '/api/chat'; // Replace with your actual chat endpoint
+      const API_HISTORY_ENDPOINT = '/api/history'; // Replace with your actual history endpoint
+      const CLEAR_ENDPOINT = '/clear'; // Replace with your actual clear endpoint
+      const COOLDOWN_DURATION = 60 * 1000; // 60 seconds for advanced reasoning
+      const MOBILE_BREAKPOINT = 640; // Tailwind's sm breakpoint
       let advancedToggleCooldownEndTime = 0;
+      let advancedCooldownIntervalId = null;
       let isComposing = false;
+      let currentAssistantMessageDiv = null; // For potential streaming
+      // --- Utility Functions ---
+      // Basic HTML escaping
+      function escapeHtml(unsafe) {
+        if (!unsafe) return '';
+        return unsafe
+          .replace(/&/g, "&")
+          .replace(/</g, "<")
+          .replace(/>/g, ">")
+          .replace(/"/g, """)
+          .replace(/'/g, "'");
       }
+      // Adjust textarea height based on content
+      function adjustTextareaHeight() {
+        promptInput.style.height = 'auto';
+        const scrollHeight = promptInput.scrollHeight;
+        const maxHeight = parseInt(window.getComputedStyle(promptInput).maxHeight, 10);
+        promptInput.style.height = `${Math.min(scrollHeight, maxHeight)}px`;
+        // Optional: Adjust padding-bottom of messages area if input grows large
+        // const footerHeight = document.querySelector('footer').offsetHeight;
+        // chatMessages.style.paddingBottom = `${footerHeight + 16}px`;
       }
+      // Scroll to the bottom of the chat messages area
+      function scrollToBottom(behavior = 'smooth') {
+        requestAnimationFrame(() => {
+           setTimeout(() => {
+             chatMessages.scrollTo({ top: chatMessages.scrollHeight, behavior });
+           }, behavior === 'smooth' ? 50 : 10); // Small delay to ensure rendering
+        });
       }
+       // Show/hide the AI loading indicator
       function showLoading(show) {
         sendButton.disabled = show;
         promptInput.disabled = show;
         fileUpload.disabled = show;
+        webSearchToggle.disabled = show; // Disable web search toggle
+        // Disable advanced toggle, considering its own cooldown
+        advancedToggle.disabled = show || (advancedToggleCooldownEndTime > Date.now());
         if (show) {
+          loadingIndicator.classList.remove('hidden');
+          chatMessages.appendChild(loadingIndicator); // Ensure loader is at the end
+          scrollToBottom();
+          // Visually indicate disabled state for file clear
           clearFileButton.style.pointerEvents = 'none';
           clearFileButton.style.opacity = '0.5';
         } else {
+          loadingIndicator.classList.add('hidden');
+          // Reset state for file clear
           clearFileButton.style.pointerEvents = 'auto';
+          clearFileButton.style.opacity = '1';
         }
       }
+      // Display an error message in the banner
       function displayError(message) {
+          errorTextP.textContent = message || "An unknown error occurred.";
+          errorMessageDiv.classList.remove('hidden', 'opacity-0', 'max-h-0', 'p-0', 'border-0');
+          errorMessageDiv.setAttribute('aria-hidden', 'false');
+          // Optional: scroll error into view if needed
+          // errorMessageDiv.scrollIntoView({ behavior: 'smooth', block: 'center' });
       }
+      // Hide the error banner
+      function hideError() {
+          if (errorMessageDiv.classList.contains('hidden')) return; // Avoid multiple calls
+          errorMessageDiv.classList.add('opacity-0', 'max-h-0', 'p-0', 'border-0');
+          // Wait for transition to complete before hiding
+          setTimeout(() => {
+             errorMessageDiv.classList.add('hidden');
+             errorMessageDiv.setAttribute('aria-hidden', 'true');
+          }, 300);
+      }
+      // Format file size for display
+       function formatFileSize(bytes) {
+         if (bytes === 0) return '0 Bytes';
+         const k = 1024;
+         const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
+         const i = Math.max(0, Math.floor(Math.log(bytes) / Math.log(k)));
+         if (i >= sizes.length) return `${(bytes / Math.pow(k, sizes.length - 1)).toFixed(1)} ${sizes[sizes.length - 1]}`;
+         return `${parseFloat((bytes / Math.pow(k, i)).toFixed(1))} ${sizes[i]}`;
+       }
+      // Get FontAwesome icon class for file type
+      function getFileIcon(fileType) {
+        if (!fileType) return 'fa-file';
+        if (fileType.includes('pdf')) return 'fa-file-pdf';
+        if (fileType.includes('image')) return 'fa-file-image';
+        if (fileType.includes('video')) return 'fa-file-video';
+        if (fileType.includes('audio')) return 'fa-file-audio';
+        if (fileType.includes('zip') || fileType.includes('archive')) return 'fa-file-zipper';
+        if (fileType.includes('word')) return 'fa-file-word';
+        if (fileType.includes('spreadsheet') || fileType.includes('excel')) return 'fa-file-excel';
+        if (fileType.includes('presentation') || fileType.includes('powerpoint')) return 'fa-file-powerpoint';
+        if (fileType.includes('text')) return 'fa-file-lines';
+        if (fileType.includes('csv')) return 'fa-file-csv';
+        if (fileType.includes('code') || fileType.includes('script') || fileType.includes('json') || fileType.includes('xml')) return 'fa-file-code';
+        return 'fa-file';
+      }
+      // --- Theme Management ---
+      function applyTheme(theme) {
+        if (theme === 'dark') {
+          htmlElement.classList.add('dark');
+        } else {
+          htmlElement.classList.remove('dark');
+        }
+         // Update scrollbar color if needed (Firefox)
+         // This is handled by CSS variable in the style block now
+      }
+      function initializeTheme() {
+        const savedTheme = localStorage.theme;
+        const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
+        if (savedTheme) {
+          applyTheme(savedTheme);
         } else {
+          applyTheme(prefersDark ? 'dark' : 'light');
         }
+      }
+      function toggleTheme() {
+        const isDark = htmlElement.classList.contains('dark');
+        const newTheme = isDark ? 'light' : 'dark';
+        applyTheme(newTheme);
+        localStorage.theme = newTheme;
+      }
+      // --- Add Message to Chat ---
+      function addMessageToChat(role, content, isHtml = false, animate = true) {
+        hideError(); // Hide error banner on new message
+        const messageWrapper = document.createElement('div');
+        messageWrapper.classList.add('message-animate');
+        let messageHtml = '';
+        let textContentForCopy = content;
+        // Basic sanitization for HTML content
+        const cleanContent = isHtml ? content : escapeHtml(content);
         if (role === 'user') {
+          messageWrapper.classList.add('flex', 'justify-end', 'w-full');
+          messageHtml = `
+            <div class="message-bubble user-message group relative">
+              <div class="prose prose-sm sm:prose-base max-w-none text-white dark:prose-invert">${cleanContent}</div>
+              <button class="copy-btn" aria-label="Copy message">
+                <i class="fa-regular fa-copy"></i>
+              </button>
             </div>
           `;
+          textContentForCopy = content; // Use original text for copy
+        } else { // Assistant
+          messageWrapper.classList.add('assistant-message-wrapper');
+          messageHtml = `
+            <div class="assistant-avatar">✨</div>
+            <div class="message-bubble assistant-message group relative">
+              <div class="prose prose-sm sm:prose-base max-w-none dark:prose-invert">
+                 ${cleanContent}
               </div>
+              <button class="copy-btn" aria-label="Copy response">
+                 <i class="fa-regular fa-copy"></i>
+              </button>
             </div>
           `;
+          // Extract plain text from HTML for copy
+          const tempDiv = document.createElement('div');
+          tempDiv.innerHTML = content; // Use original content before escape
+          textContentForCopy = tempDiv.textContent || tempDiv.innerText || content;
         }
+        messageWrapper.innerHTML = messageHtml;
+        // Insert message before the loading indicator
+        chatMessages.insertBefore(messageWrapper, loadingIndicator);
+        // Activate message copy button
+        const copyBtn = messageWrapper.querySelector('.copy-btn');
+        if (copyBtn) {
+          copyBtn.addEventListener('click', () => {
+            navigator.clipboard.writeText(textContentForCopy).then(() => {
+              const icon = copyBtn.querySelector('i');
+              icon.classList.remove('fa-regular', 'fa-copy');
+              icon.classList.add('fa-solid', 'fa-check');
+              copyBtn.setAttribute('aria-label', 'Copied!');
+              setTimeout(() => {
+                icon.classList.remove('fa-solid', 'fa-check');
+                icon.classList.add('fa-regular', 'fa-copy');
+                copyBtn.setAttribute('aria-label', 'Copy response');
+              }, 2000);
+            }).catch(err => {
+                console.error('Copy failed:', err);
+                // Optionally display a copy error
+            });
           });
+        }
+        // Activate code block copy buttons within this new message
+        messageWrapper.querySelectorAll('pre').forEach(pre => {
+          pre.classList.add('group', 'relative');
           const code = pre.querySelector('code');
           if (!code) return;
+          // Prevent adding button if already exists (e.g. during history load)
           if (pre.querySelector('.code-copy-btn')) return;
+          const copyCodeButton = document.createElement('button');
+          copyCodeButton.innerHTML = '<i class="fa-regular fa-copy"></i>';
+          copyCodeButton.className = 'code-copy-btn tooltip';
+          copyCodeButton.setAttribute('aria-label', 'Copy code');
           const tooltipText = document.createElement('span');
           tooltipText.className = 'tooltip-text !text-xs';
+          tooltipText.textContent = 'Copy';
+          copyCodeButton.appendChild(tooltipText);
+          copyCodeButton.addEventListener('click', () => {
             navigator.clipboard.writeText(code.innerText).then(() => {
+              const icon = copyCodeButton.querySelector('i');
+              icon.classList.remove('fa-regular', 'fa-copy');
+              icon.classList.add('fa-solid', 'fa-check');
+              tooltipText.textContent = 'Copied!';
               setTimeout(() => {
+                icon.classList.remove('fa-solid', 'fa-check');
+                icon.classList.add('fa-regular', 'fa-copy');
+                tooltipText.textContent = 'Copy';
               }, 2000);
             }).catch(err => {
+              console.error('Failed to copy code:', err);
+              tooltipText.textContent = 'Error';
+              setTimeout(() => { tooltipText.textContent = 'Copy'; }, 2000);
             });
           });
+          pre.appendChild(copyCodeButton);
         });
+        // Wrap tables in a container for horizontal scrolling
+        messageWrapper.querySelectorAll('.prose table').forEach(table => {
+            if (!table.closest('.table-wrapper')) {
+                const wrapper = document.createElement('div');
+                wrapper.className = 'table-wrapper';
+                table.parentNode.insertBefore(wrapper, table);
+                wrapper.appendChild(table);
+            }
+        });
+        if (animate) {
+          scrollToBottom(); // Smooth scroll for new messages
+        }
+        // Keep reference to assistant message div for potential streaming
+        if(role === 'assistant') {
+            currentAssistantMessageDiv = messageWrapper.querySelector('.prose');
+        } else {
+            currentAssistantMessageDiv = null;
+        }
       }
+       // --- Advanced Cooldown Management ---
+       function updateAdvancedCooldownTimer() {
+         const now = Date.now();
+         if (advancedToggleCooldownEndTime <= now) {
+           clearInterval(advancedCooldownIntervalId);
+           advancedCooldownIntervalId = null;
+           advancedCooldownTimerSpan.classList.add('hidden');
+           advancedToggle.disabled = false;
+           // Re-enable the label cursor style
+           advancedToggle.closest('label').classList.remove('opacity-50', 'cursor-not-allowed');
+         } else {
+           const remainingSeconds = Math.ceil((advancedToggleCooldownEndTime - now) / 1000);
+           advancedCooldownTimerSpan.textContent = `(${remainingSeconds}s)`;
+           advancedCooldownTimerSpan.classList.remove('hidden');
+           advancedToggle.disabled = true; // Keep disabled during cooldown
+           advancedToggle.closest('label').classList.add('opacity-50', 'cursor-not-allowed');
+         }
+       }
+       function startAdvancedCooldownTimer() {
+         advancedToggle.disabled = true;
+         advancedToggle.checked = false; // Uncheck after use
+         advancedToggle.closest('label').classList.add('opacity-50', 'cursor-not-allowed');
+         advancedToggleCooldownEndTime = Date.now() + COOLDOWN_DURATION;
+         updateAdvancedCooldownTimer(); // Update immediately
+         if (!advancedCooldownIntervalId) {
+            advancedCooldownIntervalId = setInterval(updateAdvancedCooldownTimer, 1000);
+         }
+       }
+      // --- Load Chat History ---
       async function loadChatHistory() {
+        historyLoadingIndicator.classList.remove('hidden');
+        chatMessages.innerHTML = ''; // Clear existing messages (if any)
+        chatMessages.appendChild(historyLoadingIndicator); // Add loader to empty container
+        chatMessages.appendChild(loadingIndicator); // Keep AI loader ready
         try {
           const response = await fetch(API_HISTORY_ENDPOINT);
           if (!response.ok) {
+            let errorMsg = `Server Error (${response.status})`;
+            try { const errData = await response.json(); errorMsg = errData.error || errorMsg; } catch (e) {}
             throw new Error(errorMsg);
           }
           const data = await response.json();
           if (data.success && Array.isArray(data.history)) {
             if (data.history.length === 0) {
+              addMessageToChat('assistant', "Bonjour ! Je suis Mariam ✨ Comment puis-je vous aider aujourd'hui ?", true, false);
             } else {
               data.history.forEach(message => {
+                // Assuming assistant content is already formatted HTML from backend
+                addMessageToChat(message.role, message.text, message.role === 'assistant', false);
               });
             }
+            // Scroll without animation after initial load
+            scrollToBottom('auto');
           } else {
+            throw new Error(data.error || "Invalid history response format.");
           }
         } catch (error) {
+          console.error("Error loading history:", error);
+          displayError(`Impossible de charger l'historique : ${error.message}`);
+          // Add fallback message if chat is empty after load attempt
+          if (chatMessages.querySelectorAll('.message-animate').length === 0) {
+            addMessageToChat('assistant', "Bonjour ! Je n'ai pas pu charger notre conversation précédente. Comment puis-je vous aider ?", true, false);
           }
         } finally {
+          historyLoadingIndicator.classList.add('hidden'); // Hide history loader
+          promptInput.focus(); // Focus the input
+          adjustTextareaHeight(); // Adjust height in case of saved text
         }
       }
+      // --- File Management ---
+      function clearFileInput(triggerAdjust = true) {
         fileUpload.value = '';
         fileChip.classList.add('hidden');
         fileNameSpan.textContent = '';
         fileNameSpan.title = '';
+        previewArea.innerHTML = '';
         previewArea.classList.add('hidden');
+        if (triggerAdjust) adjustTextareaHeight();
       }
       fileUpload.addEventListener('change', () => {
         if (fileUpload.files.length > 0) {
           const file = fileUpload.files[0];
           const name = file.name;
+          const type = file.type;
+          const size = file.size;
+          // Client-side validation (size) - Must be validated server-side too!
+          const maxSize = 10 * 1024 * 1024; // 10 MB
+          if (size > maxSize) {
+              displayError(`Le fichier "${escapeHtml(name)}" est trop volumineux (${formatFileSize(size)}). Maximum : ${formatFileSize(maxSize)}.`);
+              clearFileInput(false);
+              return;
+          }
+          // Optional: more rigorous type validation
           fileNameSpan.textContent = name;
           fileNameSpan.title = name;
           fileChip.classList.remove('hidden');
+          previewArea.innerHTML = '';
+          const previewWrapper = document.createElement('div');
+          previewWrapper.className = 'file-preview-wrapper animate-fade-in';
+          if (type.startsWith('image/')) {
             const reader = new FileReader();
             reader.onload = (e) => {
+              previewWrapper.innerHTML = `
+                  <img src="${e.target.result}" alt="Preview: ${escapeHtml(name)}">
+                  <div class="file-info-overlay">
+                     <span>${escapeHtml(name)}</span>
+                     <span>${formatFileSize(size)}</span>
+                  </div>`;
+              previewArea.appendChild(previewWrapper);
               previewArea.classList.remove('hidden');
+              adjustTextareaHeight();
             };
+             reader.onerror = () => {
+                displayError(`Error reading image file "${escapeHtml(name)}".`);
+                clearFileInput();
+             };
             reader.readAsDataURL(file);
           } else {
+            // Generic preview for other file types
+            previewWrapper.innerHTML = `
+              <div class="flex items-center p-3 bg-secondary-50 dark:bg-secondary-800">
+                <i class="fa-solid ${getFileIcon(type)} text-4xl text-secondary-400 dark:text-secondary-500 mr-3"></i>
+                <div class="text-xs text-secondary-700 dark:text-secondary-300 overflow-hidden">
+                   <p class="font-medium truncate">${escapeHtml(name)}</p>
+                   <p class="opacity-80">${formatFileSize(size)}</p>
+                   <p class="opacity-60 truncate">${type || 'Unknown Type'}</p>
                 </div>
               </div>`;
+            previewArea.appendChild(previewWrapper);
             previewArea.classList.remove('hidden');
+            adjustTextareaHeight();
           }
         } else {
           clearFileInput();
         }
       });
+      clearFileButton.addEventListener('click', (e) => {
+          e.preventDefault();
+          clearFileInput();
+          promptInput.focus();
       });
+      // --- Input & Form Submission ---
+      promptInput.addEventListener('input', adjustTextareaHeight);
+      promptInput.addEventListener('paste', () => setTimeout(adjustTextareaHeight, 0)); // Adjust after paste content is in
+      // Handle Enter / Shift+Enter keydown
       promptInput.addEventListener('keydown', (e) => {
+         if (isComposing) return;
+         if (e.key === 'Enter') {
+             if (!e.shiftKey) {
+                 e.preventDefault(); // Prevent default newline
+                 // Submit if there's text or a file, and button is not disabled
+                 if (!sendButton.disabled && (promptInput.value.trim() || fileUpload.files.length > 0)) {
+                    chatForm.dispatchEvent(new Event('submit', { cancelable: true }));
+                 }
+             }
+             // If Shift+Enter, allow default newline and adjust height
+             else {
+                  setTimeout(adjustTextareaHeight, 0);
+             }
+         }
       });
+       // Handle IME composition (for languages like Chinese, Japanese, Korean)
+       promptInput.addEventListener('compositionstart', () => { isComposing = true; });
+       promptInput.addEventListener('compositionend', () => {
+         isComposing = false;
+         setTimeout(adjustTextareaHeight, 0); // Adjust after composition is finalized
+       });
+      // Main Form Submission
       chatForm.addEventListener('submit', async (e) => {
         e.preventDefault();
+        const promptText = promptInput.value.trim();
         const file = fileUpload.files[0];
         const useWebSearch = webSearchToggle.checked;
         const useAdvanced = advancedToggle.checked;
+        if (sendButton.disabled || (!promptText && !file)) {
           promptInput.focus();
           return;
         }
+        hideError(); // Hide previous errors
+        // Check Advanced cooldown
         if (useAdvanced) {
           const now = Date.now();
           if (advancedToggleCooldownEndTime > 0 && now < advancedToggleCooldownEndTime) {
             const remainingSeconds = Math.ceil((advancedToggleCooldownEndTime - now) / 1000);
+            displayError(`Le mode avancé est en récupération. Disponible dans ${remainingSeconds} seconde(s).`);
             return;
           }
         }
+        // Display user message
+        let userMessageDisplayed = promptText;
         if (file && file.name) {
+          const fileTag = `[Fichier: ${escapeHtml(file.name)}]`;
+          userMessageDisplayed = promptText ? `${promptText}\n${fileTag}` : fileTag;
         }
+        addMessageToChat('user', userMessageDisplayed, false);
+        // Prepare form data
         const formData = new FormData();
+        formData.append('prompt', promptText);
         formData.append('web_search', useWebSearch);
         formData.append('advanced_reasoning', useAdvanced);
         if (file) {
           formData.append('file', file);
         }
+        // Reset UI
         promptInput.value = '';
+        promptInput.style.height = 'auto';
+        adjustTextareaHeight();
         clearFileInput();
         if (useAdvanced) {
+          startAdvancedCooldownTimer(); // Start cooldown
         }
+        // Optionally uncheck web search
+        // webSearchToggle.checked = false;
+        showLoading(true); // Show loading indicator
         try {
           const response = await fetch(API_CHAT_ENDPOINT, { method: 'POST', body: formData });
           if (!response.ok) {
+             // Attempt to read error from response body
+             let errorData = { error: `Server Error: ${response.status} ${response.statusText}`};
+             try {
+                errorData = await response.json();
+             } catch (jsonError) {
+                console.error("Failed to parse JSON error:", jsonError);
+             }
+             throw new Error(errorData.error || `Server Error: ${response.status}`);
           }
+          const data = await response.json();
           if (data.success && data.message) {
+             // Assuming data.message is HTML formatted from backend
+             addMessageToChat('assistant', data.message, true);
           } else {
+            throw new Error(data.error || "Invalid or empty response received from server.");
           }
         } catch (error) {
+          console.error("Chat API Error:", error);
+          // Display error within an assistant message bubble
+          addMessageToChat('assistant', `<p class="text-red-600 dark:text-red-400 font-medium">Désolé, une erreur est survenue :</p><p class="text-sm mt-1">${escapeHtml(error.message)}</p>`, true);
+          // Optionally display the banner for critical errors
+          // displayError(`Communication error: ${error.message}`);
         } finally {
+          showLoading(false); // Hide loading indicator
+          promptInput.focus(); // Return focus to input
         }
       });
+      // --- Clear Conversation ---
       clearForm.addEventListener('submit', async (e) => {
         e.preventDefault();
+        // Show confirmation modal
         const confirmDialog = document.createElement('div');
+        confirmDialog.className = 'fixed inset-0 bg-black/60 backdrop-blur-sm flex items-center justify-center z-50 p-4 animate-fade-in';
+        confirmDialog.setAttribute('role', 'dialog');
+        confirmDialog.setAttribute('aria-modal', 'true');
+        confirmDialog.setAttribute('aria-labelledby', 'confirm-dialog-title');
         confirmDialog.innerHTML = `
+          <div class="bg-white dark:bg-secondary-800 p-6 rounded-lg shadow-xl max-w-sm w-full transform transition-transform duration-300 scale-95 opacity-0" data-dialog-content>
+            <h3 id="confirm-dialog-title" class="text-lg font-semibold mb-3 text-secondary-900 dark:text-secondary-100">Vider la conversation ?</h3>
+            <p class="text-sm text-secondary-600 dark:text-secondary-300 mb-6">Toute l'historique de cette session sera définitivement effacé.</p>
             <div class="flex justify-end space-x-3">
+              <button type="button" data-cancel class="px-4 py-2 text-sm font-medium text-secondary-700 dark:text-secondary-300 bg-secondary-100 dark:bg-secondary-700 rounded-md hover:bg-secondary-200 dark:hover:bg-secondary-600 transition-colors focus:outline-none focus-visible:ring-2 focus-visible:ring-secondary-400">
                 Annuler
               </button>
+              <button type="button" data-confirm class="px-4 py-2 text-sm font-medium text-white bg-red-600 rounded-md hover:bg-red-700 transition-colors focus:outline-none focus-visible:ring-2 focus-visible:ring-red-500">
                 Effacer
               </button>
             </div>
           </div>
         `;
+        let isClosing = false;
+        const dialogContent = confirmDialog.querySelector('[data-dialog-content]');
+        const closeModal = (focusReturnElement = null) => {
+            if (isClosing) return;
+            isClosing = true;
+            dialogContent.classList.remove('scale-100', 'opacity-100');
+            dialogContent.classList.add('scale-95', 'opacity-0');
+            confirmDialog.classList.add('opacity-0');
+            setTimeout(() => {
+                if (document.body.contains(confirmDialog)) {
+                    document.body.removeChild(confirmDialog);
+                    document.body.style.overflow = ''; // Restore body scroll
+                    if (focusReturnElement) focusReturnElement.focus(); // Return focus
+                }
+            }, 300);
         };
+        const clearButton = e.target.querySelector('button[type="submit"]'); // Get the button to update its state
+        confirmDialog.querySelector('[data-cancel]').addEventListener('click', () => closeModal(clearButton));
+        confirmDialog.querySelector('[data-confirm]').addEventListener('click', async () => {
+          closeModal(); // Close modal immediately
           const originalButtonContent = clearButton.innerHTML;
           clearButton.disabled = true;
+          clearButton.innerHTML = `
+              <i class="fa-solid fa-spinner fa-spin mr-0 sm:mr-1.5 text-sm"></i>
+              <span class="header-action-text">Effacement...</span>`;
           try {
+            const response = await fetch(CLEAR_ENDPOINT, {
               method: 'POST',
+              headers: { 'X-Requested-With': 'XMLHttpRequest' }
             });
             const data = await response.json();
             if (response.ok && data.success) {
+              // Clear chat UI
+              const messagesToRemove = chatMessages.querySelectorAll('.message-animate, .assistant-message-wrapper');
               messagesToRemove.forEach(el => el.remove());
+              // Add initial welcome message
+              addMessageToChat('assistant', "Conversation effacée. Prêt pour une nouvelle discussion !", true);
+              hideError();
+              // Reset cooldown if needed (depends on backend logic)
+              // advancedToggleCooldownEndTime = 0;
+              // updateAdvancedCooldownTimer();
             } else {
+              throw new Error(data.error || "Unable to clear conversation.");
             }
           } catch (error) {
+            console.error("Clear Chat Error:", error);
+            displayError(`Erreur lors de l'effacement : ${error.message}`);
           } finally {
+            clearButton.innerHTML = originalButtonContent; // Restore button text
             clearButton.disabled = false;
+            promptInput.focus(); // Focus input
           }
         });
+        // Handle Escape key to close modal
+        confirmDialog.addEventListener('keydown', (event) => {
+             if (event.key === 'Escape') closeModal(clearButton);
+        });
+        // Handle click outside modal content to close
+        confirmDialog.addEventListener('click', (event) => {
+             if (event.target === confirmDialog) closeModal(clearButton);
+        });
         document.body.appendChild(confirmDialog);
+        document.body.style.overflow = 'hidden'; // Prevent body scroll
+        // Animate modal appearance
+        requestAnimationFrame(() => {
+            confirmDialog.classList.remove('opacity-0');
+            dialogContent.classList.add('scale-100', 'opacity-100');
+            dialogContent.classList.remove('scale-95', 'opacity-0');
+        });
+        confirmDialog.querySelector('[data-cancel]').focus(); // Focus the cancel button first
       });
+      // --- Initialization ---
+      initializeTheme();
+      themeToggleBtn.addEventListener('click', toggleTheme);
+      dismissErrorBtn.addEventListener('click', hideError);
+      loadChatHistory(); // Load history on startup
+      adjustTextareaHeight(); // Adjust initial input height
+      updateAdvancedCooldownTimer(); // Check advanced cooldown state on load
+      // Listen for system color scheme changes
+      window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', e => {
+          // Only apply system preference if user hasn't manually set a theme
+          if (!localStorage.getItem('theme')) {
+             applyTheme(e.matches ? 'dark' : 'light');
           }
+      });
+       // Adjust textarea height and maybe scroll on window resize
+       let resizeTimeout;
+       window.addEventListener('resize', () => {
+         clearTimeout(resizeTimeout);
+         resizeTimeout = setTimeout(() => {
+           adjustTextareaHeight();
+           // Optional: re-scroll to bottom if user was already there
+           // const isAtBottom = chatMessages.scrollTop + chatMessages.clientHeight >= chatMessages.scrollHeight - 50;
+           // if (isAtBottom) {
+           //    scrollToBottom('auto');
+           // }
+         }, 100); // Debounce resize events
+       });
+    }); // End DOMContentLoaded
   </script>
 </body>
+</html>