diff --git a/app/routers/dashboard.py b/app/routers/dashboard.py
index d76572e..d994c4a 100644
--- a/app/routers/dashboard.py
+++ b/app/routers/dashboard.py
@@ -71,42 +71,52 @@ async def trash_page(request: Request, owner: str = Query(default=""), repo: str
 
 @router.get("/library", response_class=HTMLResponse)
 async def library_page(request: Request, owner: str = Query(default=""), repo: str = Query(default="")):
-    """Library page avec onglets Recents, Favorites, Shared, Private — scopé au workspace."""
+    """Library page avec onglets Recents, Favorites, Shared, Private — scopé au workspace.
+    
+    La sidebar garde exactement la même arborescence que dans le workspace.
+    Seul le contenu principal change pour afficher les pages triées par catégorie.
+    """
     from jinja2 import Environment, FileSystemLoader
     from app.routers.board import _sidebar_data as board_sidebar
     env = Environment(loader=FileSystemLoader("app/templates"))
-    sidebar = board_sidebar(request, owner, repo)
-    # Load all pages for the workspace from DB
+    sidebar = board_sidebar(request, owner, repo)  # Sidebar intacte, inchangée
+
     ws_key = f"{owner}/{repo}" if owner and repo else ""
     with get_conn() as conn:
+        base_query = (
+            "SELECT id, title, workspace, parent_section, updated_at FROM pages "
+            "WHERE parent_section != 'Trash'"
+        )
+        params = []
         if ws_key:
-            rows = conn.execute(
-                "SELECT id, title, workspace, updated_at FROM pages "
-                "WHERE workspace=? ORDER BY updated_at DESC",
-                (ws_key,),
-            ).fetchall()
-        else:
-            rows = conn.execute(
-                "SELECT id, title, workspace, updated_at FROM pages "
-                "ORDER BY updated_at DESC",
-            ).fetchall()
-    all_pages = []
-    for r in rows:
-        page = dict(r)
-        all_pages.append({
-            "id": f"page/{page['id']}",
-            "name": page["title"] or "Untitled",
+            base_query += " AND workspace=?"
+            params.append(ws_key)
+        base_query += " ORDER BY updated_at DESC"
+        rows = conn.execute(base_query, params).fetchall()
+
+    def to_page(r):
+        r = dict(r)
+        return {
+            "id": f"page/{r['id']}",
+            "name": r["title"] or "Untitled",
             "icon": "📄",
-            "url": f"/pages/{page['id']}",
+            "url": f"/pages/{r['id']}",
             "created_by": "You",
-            "source": page.get("workspace") or "🔒 Private",
-            "last_edited": page.get("updated_at", "now"),
-            "last_visited": page.get("updated_at", "now"),
-        })
-    sidebar["recent_pages"] = all_pages
-    sidebar["favorite_pages"] = []
-    sidebar["private_pages"] = [p for p in all_pages if p.get("source") == "🔒 Private"]
-    sidebar["shared_pages"] = []
+            "source": r.get("workspace") or "🔒 Private",
+            "last_edited": r.get("updated_at", "now"),
+            "last_visited": r.get("updated_at", "now"),
+        }
+
+    all_pages = [to_page(r) for r in rows]
+
+    # Catégoriser par parent_section — sidebar data intacte
+    sidebar["lib_recent"] = all_pages
+    sidebar["lib_favorites"] = [p for p, r in zip(all_pages, rows) if (r["parent_section"] or "") == "Favorites"]
+    sidebar["lib_shared"] = [p for p, r in zip(all_pages, rows) if (r["parent_section"] or "") == "Shared"]
+    sidebar["lib_private"] = [p for p, r in zip(all_pages, rows) if (r["parent_section"] or "Private") == "Private"]
+    sidebar["lib_has_favorites"] = len(sidebar["lib_favorites"]) > 0
+    sidebar["lib_has_shared"] = len(sidebar["lib_shared"]) > 0
+
     template = env.get_template("library.html")
     return template.render(**sidebar)
 
diff --git a/app/templates/library.html b/app/templates/library.html
index bf3d98d..b1747e6 100644
--- a/app/templates/library.html
+++ b/app/templates/library.html
@@ -15,12 +15,16 @@
   <button class="view-tab" :class="{ active: tab === 'recents' }" @click="tab = 'recents'">
     <span class="tab-icon">🕒</span> Recents
   </button>
+  {% if lib_has_favorites %}
   <button class="view-tab" :class="{ active: tab === 'favorites' }" @click="tab = 'favorites'">
     <span class="tab-icon">⭐</span> Favorites
   </button>
+  {% endif %}
+  {% if lib_has_shared %}
   <button class="view-tab" :class="{ active: tab === 'shared' }" @click="tab = 'shared'">
     <span class="tab-icon">👥</span> Shared
   </button>
+  {% endif %}
   <button class="view-tab" :class="{ active: tab === 'private' }" @click="tab = 'private'">
     <span class="tab-icon">🔒</span> Private
   </button>
@@ -61,8 +65,8 @@
 
   <!-- Recents -->
   <div x-show="tab === 'recents'">
-    {% for page in recent_pages %}{{ page_row(page) }}{% endfor %}
-    {% if not recent_pages %}
+    {% for page in lib_recent %}{{ page_row(page) }}{% endfor %}
+    {% if not lib_recent %}
     <div class="lib-empty">
       <div style="font-size:48px;margin-bottom:16px;">🕒</div>
       <h3>No recent pages</h3>
@@ -72,8 +76,8 @@
 
   <!-- Favorites -->
   <div x-show="tab === 'favorites'">
-    {% for page in favorite_pages %}{{ page_row(page) }}{% endfor %}
-    {% if not favorite_pages %}
+    {% for page in lib_favorites %}{{ page_row(page) }}{% endfor %}
+    {% if not lib_favorites %}
     <div class="lib-empty">
       <div style="font-size:48px;margin-bottom:16px;">⭐</div>
       <h3>No favorites</h3>
@@ -84,17 +88,20 @@
 
   <!-- Shared -->
   <div x-show="tab === 'shared'">
+    {% for page in lib_shared %}{{ page_row(page) }}{% endfor %}
+    {% if not lib_shared %}
     <div class="lib-empty">
       <div style="font-size:48px;margin-bottom:16px;">👥</div>
       <h3>No shared pages</h3>
       <p>Shared pages from your team will appear here.</p>
     </div>
+    {% endif %}
   </div>
 
   <!-- Private -->
   <div x-show="tab === 'private'">
-    {% for page in private_pages %}{{ page_row(page) }}{% endfor %}
-    {% if not private_pages %}
+    {% for page in lib_private %}{{ page_row(page) }}{% endfor %}
+    {% if not lib_private %}
     <div class="lib-empty">
       <div style="font-size:48px;margin-bottom:16px;">🔒</div>
       <h3>No private pages</h3>