diff --git a/.claude/rules/screenshots.md b/.claude/rules/screenshots.md
new file mode 100644
index 0000000..f1dc266
--- /dev/null
+++ b/.claude/rules/screenshots.md
@@ -0,0 +1,34 @@
+# Règles — Captures d'écran
+
+## Emplacement
+Les captures d'écran sont disponibles à l'emplacement suivant :
+
+```
+/home/Gato/Images/Captures d'écran/
+```
+
+## Quand les consulter
+- Lorsque l'utilisateur mentionne une capture d'écran sans fournir de chemin explicite.
+- Lorsqu'un bug visuel ou un comportement d'interface est décrit — consulter la capture la plus récente pour avoir le contexte visuel.
+- Lorsqu'une tâche porte sur l'UI et qu'une illustration de l'état actuel est utile.
+- Après avoir relancé l'application pour vérifier un changement visuel.
+
+## Comportement attendu
+- Lire le fichier le plus récent du dossier (tri par date de modification).
+- Ne pas demander à l'utilisateur de fournir le chemin si la capture se trouve dans ce dossier.
+- Ne pas demander à l'utilisateur de prendre une capture d'écran.
+- **Ne jamais prendre de capture d'écran de façon autonome** (`scrot`, `grim`, `gnome-screenshot`, `import`, etc.).
+
+## Note technique
+Le nom du dossier contient un `é` dont l'encodage n'est pas résolu correctement par `ls` ni `find`. Utiliser **Python `os.scandir`** pour lister les fichiers :
+
+```python
+import os, shutil
+base = "/home/Gato/Images"
+for entry in os.scandir(base):
+    if "Captures" in entry.name:
+        files = sorted(os.scandir(entry.path), key=lambda e: e.stat().st_mtime, reverse=True)
+        shutil.copy(files[0].path, '/tmp/screenshot.png')
+```
+
+Puis lire `/tmp/screenshot.png` avec le tool `Read`.
diff --git a/src/index.html b/src/index.html
index e841062..f928ac8 100644
--- a/src/index.html
+++ b/src/index.html
@@ -17,6 +17,10 @@
       <button id="btn-open-file">Ouvrir un fichier Markdown</button>
       <button id="btn-open-dir">Ouvrir un dossier wiki</button>
     </div>
+    <div id="home-recents" class="home-recents hidden">
+      <p class="home-recents__label">Récents</p>
+      <ul id="home-recents-list" class="home-recents__list"></ul>
+    </div>
   </div>
 
   <div id="view-reader" class="hidden">
diff --git a/src/main.js b/src/main.js
index 0815572..a73f1ee 100644
--- a/src/main.js
+++ b/src/main.js
@@ -6,6 +6,50 @@ const viewReader = document.getElementById('view-reader');
 const sidebar = document.querySelector('#sidebar');
 const content = document.querySelector('#content');
 
+const RECENTS_KEY = 'pena_recents';
+const RECENTS_MAX = 8;
+
+function loadRecents() {
+  try { return JSON.parse(localStorage.getItem(RECENTS_KEY) ?? '[]'); }
+  catch { return []; }
+}
+
+function saveRecent(path, mode) {
+  const name = path.replace(/\\/g, '/').split('/').pop().replace(/\.md$/i, '');
+  const parent = path.replace(/\\/g, '/').split('/').slice(0, -1).join('/');
+  const recents = loadRecents().filter(r => r.path !== path);
+  recents.unshift({ path, mode, name, parent });
+  localStorage.setItem(RECENTS_KEY, JSON.stringify(recents.slice(0, RECENTS_MAX)));
+  renderRecents();
+}
+
+function renderRecents() {
+  const recents = loadRecents();
+  const container = document.getElementById('home-recents');
+  const list = document.getElementById('home-recents-list');
+  if (recents.length === 0) {
+    container.classList.add('hidden');
+    return;
+  }
+  container.classList.remove('hidden');
+  list.innerHTML = recents.map(r => {
+    const icon = r.mode === 'dir' ? '📁' : '📄';
+    const escaped = escapeHtml(r.path);
+    return `<li>
+      <button class="home-recents__item" data-path="${escaped}" data-mode="${r.mode}">
+        <span class="home-recents__item__icon">${icon}</span>
+        <span class="home-recents__item__info">
+          <span class="home-recents__item__name">${escapeHtml(r.name)}</span>
+          <span class="home-recents__item__path">${escapeHtml(r.parent)}</span>
+        </span>
+      </button>
+    </li>`;
+  }).join('');
+  list.querySelectorAll('.home-recents__item').forEach(btn => {
+    btn.addEventListener('click', () => openPath(btn.dataset.path, btn.dataset.mode));
+  });
+}
+
 function showHome() {
   viewReader.classList.add('hidden');
   viewHome.classList.remove('hidden');
@@ -24,67 +68,83 @@ function escapeHtml(str) {
     .replace(/"/g, '&quot;');
 }
 
+function buildTree(relPaths, sep) {
+  const tree = { _files: [], _dirs: {} };
+  relPaths.forEach((rel) => {
+    const parts = rel.split(sep);
+    let node = tree;
+    for (let i = 0; i < parts.length - 1; i++) {
+      const dir = parts[i];
+      if (!node._dirs[dir]) node._dirs[dir] = { _files: [], _dirs: {} };
+      node = node._dirs[dir];
+    }
+    node._files.push(rel);
+  });
+  return tree;
+}
+
+function renderTree(node, prefix, sep, currentRel, depth) {
+  let html = '';
+  const depthClass = depth > 0 ? ` class="nav-depth-${Math.min(depth, 3)}"` : '';
+
+  node._files.slice().sort().forEach((rel) => {
+    const label = rel.split(sep).pop().replace(/\.md$/i, '').replace(/-/g, ' ');
+    const abs = prefix + rel;
+    const cls = rel === currentRel ? ' active' : '';
+    if (depth === 0) {
+      html += `\n<li><a href="#" class="nav-root-link${cls}" data-path="${escapeHtml(abs)}">${escapeHtml(label)}</a></li>`;
+    } else {
+      html += `\n<li${depthClass}><a href="#" class="nav-file-link${cls}" data-path="${escapeHtml(abs)}">${escapeHtml(label)}</a></li>`;
+    }
+  });
+
+  Object.keys(node._dirs).sort().forEach((dirName) => {
+    const child = node._dirs[dirName];
+    const isOpen = currentRel && currentRel.split(sep).includes(dirName);
+    const openAttr = isOpen ? ' open' : '';
+
+    const homeFile = child._files.find((f) => /^home\.md$/i.test(f.split(sep).pop()));
+    let folderLabel;
+    if (homeFile) {
+      const abs = prefix + homeFile;
+      const cls = homeFile === currentRel ? ' active' : '';
+      folderLabel = `<a href="#" class="nav-folder-link${cls}" data-path="${escapeHtml(abs)}" onclick="event.stopPropagation()">${escapeHtml(dirName)}</a>`;
+    } else {
+      folderLabel = `<span class="nav-folder-name">${escapeHtml(dirName)}</span>`;
+    }
+
+    const arrow = `<span class="nav-arrow" onclick="event.preventDefault();event.stopPropagation();var d=this.closest('details');d.open=!d.open">▶</span>`;
+
+    const childNode = {
+      _files: homeFile ? child._files.filter((f) => f !== homeFile) : child._files,
+      _dirs: child._dirs,
+    };
+
+    html += `\n<li${depthClass}><details class="nav-folder"${openAttr}>`;
+    html += `\n  <summary>${arrow}${folderLabel}</summary>`;
+    html += `\n  <ul class="nav-tree">`;
+    html += renderTree(childNode, prefix, sep, currentRel, depth + 1);
+    html += `\n  </ul>\n</details></li>`;
+  });
+
+  return html;
+}
+
 function buildSidebar(baseDir, files, currentFile) {
   const sep = baseDir.includes('\\') ? '\\' : '/';
   const dirName = baseDir.split(sep).pop();
   const prefix = baseDir.endsWith(sep) ? baseDir : baseDir + sep;
   const toRel = abs => abs.startsWith(prefix) ? abs.slice(prefix.length) : abs;
-  const baseName = rel => rel.split(sep).pop();
   const currentRel = currentFile ? toRel(currentFile) : null;
-
-  const groups = new Map();
-  for (const f of files) {
-    const rel = toRel(f);
-    const parts = rel.split(sep);
-    const group = parts.length > 1 ? parts[0] : '';
-    if (!groups.has(group)) groups.set(group, []);
-    groups.get(group).push({ rel, abs: f });
-  }
-
-  const sortedGroups = [...groups.keys()].sort((a, b) => {
-    if (a === '') return -1;
-    if (b === '') return 1;
-    return a.localeCompare(b);
-  });
+  const relPaths = files.map(toRel);
+  const tree = buildTree(relPaths, sep);
 
   let html = `<div class="sidebar__title-block">
     <h1 class="sidebar__title-block__title">${escapeHtml(dirName)}</h1>
   </div>
-  <ul class="sidebar__menu">`;
-
-  for (const group of sortedGroups) {
-    const pages = groups.get(group).slice().sort((a, b) => a.rel.localeCompare(b.rel));
-
-    if (group !== '') {
-      html += `
-      <li class="sidebar__menu__first-level-title">
-        <span class="sidebar__menu__group-label">${escapeHtml(group)}</span>
-        <ul class="sidebar__menu__second-level">`;
-      for (const { rel, abs } of pages) {
-        const label = baseName(rel).replace(/\.md$/i, '').replace(/-/g, ' ');
-        const cls = rel === currentRel ? ' active' : '';
-        html += `
-          <li class="sidebar__menu__second-level-title">
-            <a href="#" class="sidebar__menu__second-level-title__link${cls}" data-path="${escapeHtml(abs)}">${escapeHtml(label)}</a>
-          </li>`;
-      }
-      html += `
-        </ul>
-      </li>`;
-    } else {
-      for (const { rel, abs } of pages) {
-        const label = baseName(rel).replace(/\.md$/i, '').replace(/-/g, ' ');
-        const cls = rel === currentRel ? ' active' : '';
-        html += `
-      <li class="sidebar__menu__first-level-title">
-        <a href="#" class="sidebar__menu__first-level-title__link${cls}" data-path="${escapeHtml(abs)}">${escapeHtml(label)}</a>
-      </li>`;
-      }
-    }
-  }
-
-  html += `
-  </ul>`;
+  <ul class="sidebar__menu nav-tree">`;
+  html += renderTree(tree, prefix, sep, currentRel, 0);
+  html += `\n  </ul>`;
   return html;
 }
 
@@ -111,6 +171,14 @@ async function loadPage(filePath) {
       sidebar.querySelectorAll('a').forEach(a => {
         a.classList.toggle('active', a.dataset.path === filePath);
       });
+      const active = sidebar.querySelector('a[data-path].active');
+      if (active) {
+        let el = active.parentElement;
+        while (el && el !== sidebar) {
+          if (el.tagName === 'DETAILS') el.open = true;
+          el = el.parentElement;
+        }
+      }
     }
   } catch (err) {
     content.innerHTML = `<p class="error">Impossible de charger le fichier : ${err}</p>`;
@@ -120,6 +188,7 @@ async function loadPage(filePath) {
 async function openPath(path, mode) {
   currentPath = path;
   currentMode = mode;
+  saveRecent(path, mode);
 
   if (mode === 'file') {
     sidebar.innerHTML = '';
@@ -153,6 +222,8 @@ async function openPath(path, mode) {
   }
 }
 
+renderRecents();
+
 document.getElementById('btn-open-file').addEventListener('click', async () => {
   const selected = await window.__TAURI__.dialog.open({
     multiple: false,
diff --git a/src/style.css b/src/style.css
index e2fc34d..e0a6304 100644
--- a/src/style.css
+++ b/src/style.css
@@ -61,6 +61,79 @@ body {
   transform: translateY(0);
 }
 
+/* ── Home recents ── */
+.home-recents {
+  margin-top: 40px;
+  width: 320px;
+}
+
+.home-recents__label {
+  color: rgba(255,255,255,0.3);
+  font-size: 11px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  margin: 0 0 10px;
+}
+
+.home-recents__list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.home-recents__item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 9px 14px;
+  border-radius: 8px;
+  cursor: pointer;
+  transition: background 0.15s;
+  text-align: left;
+  background: rgba(255,255,255,0.04);
+  border: none;
+  width: 100%;
+  font-family: 'Poppins', sans-serif;
+}
+
+.home-recents__item:hover {
+  background: rgba(255,255,255,0.08);
+}
+
+.home-recents__item__icon {
+  font-size: 15px;
+  flex-shrink: 0;
+  opacity: 0.7;
+}
+
+.home-recents__item__info {
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
+.home-recents__item__name {
+  color: rgba(255,255,255,0.85);
+  font-size: 14px;
+  font-weight: 500;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.home-recents__item__path {
+  color: rgba(255,255,255,0.3);
+  font-size: 11px;
+  font-weight: 400;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
 /* ── Sidebar ── */
 .sidebar {
   position: fixed;
@@ -152,6 +225,98 @@ body {
   opacity: 1;
 }
 
+/* ── Tree nav ── */
+.nav-tree { list-style: none; margin: 0; padding: 0; }
+.nav-tree li { margin: 0; }
+
+.nav-root-link {
+  display: block;
+  padding: 7px 24px;
+  color: rgba(255,255,255,0.85);
+  text-decoration: none;
+  font-size: 16px;
+  font-weight: 400;
+  line-height: 1.4;
+  transition: color 0.2s;
+}
+.nav-root-link:hover { color: #ff5577; }
+.nav-root-link.active { color: #ff5577; font-weight: 500; }
+
+.nav-folder { margin: 0; }
+.nav-folder > summary {
+  display: flex;
+  align-items: center;
+  list-style: none;
+  cursor: default;
+  user-select: none;
+  padding: 0;
+}
+.nav-folder > summary::-webkit-details-marker { display: none; }
+
+.nav-arrow {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+  width: 28px;
+  height: 28px;
+  font-size: 9px;
+  opacity: 0.4;
+  cursor: pointer;
+  transition: transform 0.18s, opacity 0.2s;
+  border-radius: 4px;
+  color: rgba(255,255,255,0.7);
+}
+.nav-arrow:hover { opacity: 1; background: rgba(255,255,255,0.08); }
+.nav-folder[open] > summary .nav-arrow { transform: rotate(90deg); opacity: 0.8; }
+
+.nav-folder-link, .nav-folder-name {
+  flex: 1;
+  display: block;
+  padding: 6px 24px 6px 0;
+  font-size: 11px;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  color: rgba(255,255,255,0.35);
+  text-decoration: none;
+  transition: color 0.2s;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.nav-folder-link:hover { color: rgba(255,255,255,0.85); }
+.nav-folder-link.active { color: #ff5577; }
+
+.nav-folder .nav-folder > summary .nav-folder-link,
+.nav-folder .nav-folder > summary .nav-folder-name {
+  font-size: 13px;
+  font-weight: 500;
+  text-transform: none;
+  letter-spacing: 0;
+  color: rgba(255,255,255,0.45);
+}
+.nav-folder .nav-folder > summary .nav-folder-link:hover { color: rgba(255,255,255,0.9); }
+
+.nav-file-link {
+  display: block;
+  text-decoration: none;
+  font-size: 14px;
+  font-weight: 400;
+  line-height: 1.4;
+  color: rgba(255,255,255,0.55);
+  transition: color 0.2s;
+}
+.nav-file-link:hover { color: #ff5577; }
+.nav-file-link.active { color: #ff5577; font-weight: 500; }
+
+.nav-depth-1 > .nav-file-link { padding: 5px 24px 5px 52px; }
+.nav-depth-1 > .nav-folder > summary { padding-left: 24px; }
+.nav-depth-2 > .nav-file-link { padding: 4px 24px 4px 68px; }
+.nav-depth-2 > .nav-folder > summary { padding-left: 40px; }
+.nav-depth-3 > .nav-file-link { padding: 4px 24px 4px 84px; }
+.nav-depth-3 > .nav-folder > summary { padding-left: 56px; }
+
 /* ── Content ── */
 .content {
   margin-left: 264px;