diff --git a/memento-note/app/(main)/insights/page.tsx b/memento-note/app/(main)/insights/page.tsx
index 296e9dc..6c2ebeb 100644
--- a/memento-note/app/(main)/insights/page.tsx
+++ b/memento-note/app/(main)/insights/page.tsx
@@ -298,8 +298,8 @@ export default function InsightsPage() {
         <div className="flex items-center gap-4">
           <button
             className="p-2 -ms-1 text-foreground hover:bg-foreground/5 rounded-lg transition-colors shrink-0 cursor-pointer focus-visible:ring-2 focus-visible:ring-ochre/50 focus-visible:outline-none"
-            onClick={() => window.dispatchEvent(new CustomEvent('open-mobile-sidebar'))}
-            aria-label={t('sidebar.openNavigation') || 'Open navigation'}
+            onClick={() => window.dispatchEvent(new CustomEvent('toggle-insights-sidebar'))}
+            aria-label="Toggle sidebar"
           >
             <Menu size={22} />
           </button>
diff --git a/memento-note/components/network-graph.tsx b/memento-note/components/network-graph.tsx
index 9bd868e..82fc8ac 100644
--- a/memento-note/components/network-graph.tsx
+++ b/memento-note/components/network-graph.tsx
@@ -362,22 +362,27 @@ export function NetworkGraph({
 
   return (
     <div ref={containerRef} className="w-full h-full bg-paper dark:bg-[#121212] rounded-3xl overflow-hidden border border-border/40 relative">
-      {/* Pastilles de cluster — cliquables pour activer le focus */}
-      <div className="absolute top-6 left-6 z-10 flex flex-wrap gap-2 max-w-[90%]">
-        {clusters.map(c => {
+      {/* Pastilles de cluster — triées par taille, avec compteurs */}
+      <div className="absolute top-6 left-6 z-10 flex flex-wrap gap-1.5 max-w-[85%]">
+        {[...clusters]
+          .sort((a, b) => b.noteIds.length - a.noteIds.length)
+          .map(c => {
           const isSelected = String(c.id) === selectedClusterId
           return (
             <button
               key={c.id}
               onClick={() => onClusterSelect?.(isSelected ? null : String(c.id))}
-              className={`flex items-center gap-1.5 px-3 py-1.5 rounded-full border shadow-sm transition-all text-[9px] font-bold uppercase tracking-wider ${
+              className={`flex items-center gap-1.5 px-2.5 py-1 rounded-full border transition-all text-[9px] font-bold uppercase tracking-wider cursor-pointer focus-visible:ring-2 focus-visible:ring-ochre/50 focus-visible:outline-none ${
                 isSelected
                   ? 'bg-ink text-white dark:bg-white dark:text-black border-ink dark:border-white scale-105 shadow-md'
-                  : 'bg-white/90 dark:bg-black/80 text-concrete hover:text-ink hover:border-concrete/40 border-border'
+                  : 'bg-white/90 dark:bg-black/80 text-concrete hover:text-ink hover:border-concrete/40 border-border shadow-sm'
               }`}
             >
-              <div className="w-1.5 h-1.5 rounded-full" style={{ backgroundColor: c.color }} />
-              <span>{c.name ?? String(c.id)}</span>
+              <div className="w-2 h-2 rounded-full shrink-0" style={{ backgroundColor: c.color }} />
+              <span className="truncate max-w-[120px]">{c.name ?? String(c.id)}</span>
+              <span className={`text-[8px] px-1 rounded-full shrink-0 ${isSelected ? 'bg-white/20' : 'bg-black/5 dark:bg-white/10'}`}>
+                {c.noteIds.length}
+              </span>
             </button>
           )
         })}
diff --git a/memento-note/components/sidebar.tsx b/memento-note/components/sidebar.tsx
index 1c6767d..6169248 100644
--- a/memento-note/components/sidebar.tsx
+++ b/memento-note/components/sidebar.tsx
@@ -703,6 +703,27 @@ export function Sidebar({ className, user }: { className?: string; user?: any })
   const isRemindersRoute = pathname === '/home' && searchParams.get('reminders') === '1'
   const isSharedRoute = pathname === '/home' && searchParams.get('shared') === '1'
   const isImmersiveRoute = pathname === '/insights'
+
+  // Sur /insights : sidebar visible par défaut, user peut le cacher via toggle
+  const [userCollapsed, setUserCollapsed] = useState(false)
+  useEffect(() => {
+    if (isImmersiveRoute) {
+      const stored = localStorage.getItem('insights-sidebar-collapsed')
+      setUserCollapsed(stored === 'true')
+    }
+  }, [isImmersiveRoute])
+
+  useEffect(() => {
+    const onToggle = () => {
+      setUserCollapsed(prev => {
+        const next = !prev
+        if (isImmersiveRoute) localStorage.setItem('insights-sidebar-collapsed', String(next))
+        return next
+      })
+    }
+    window.addEventListener('toggle-insights-sidebar', onToggle)
+    return () => window.removeEventListener('toggle-insights-sidebar', onToggle)
+  }, [isImmersiveRoute])
   const isNotebooksRoute =
     (pathname === '/home' || pathname.startsWith('/notes')) &&
     !pathname.startsWith('/settings') &&
@@ -1158,15 +1179,13 @@ export function Sidebar({ className, user }: { className?: string; user?: any })
 
       <aside
         className={cn(
-          // Sur /insights : sidebar en overlay (toutes tailles d'écran)
-          // Ailleurs : overlay sur mobile, relative sur desktop
-          isImmersiveRoute
+          isImmersiveRoute && userCollapsed
             ? 'fixed inset-y-0 start-0 z-[70]'
             : 'fixed inset-y-0 start-0 z-[70] md:relative md:z-auto',
           'h-full min-h-0 w-80 xl:w-[22rem] 2xl:w-[26rem] shrink-0 flex flex-row overflow-hidden',
           'transition-transform duration-300 ease-in-out',
-          isImmersiveRoute
-            ? (isMobileOpen ? 'translate-x-0 shadow-2xl' : '-translate-x-full')
+          isImmersiveRoute && userCollapsed
+            ? '-translate-x-full'
             : (isMobileOpen ? 'translate-x-0 shadow-2xl' : '-translate-x-full md:translate-x-0'),
           'border-e border-border/40 bg-white/95 md:bg-white/30 backdrop-blur-md sidebar-shadow dark:border-white/6 dark:bg-[#151515] dark:backdrop-blur-none',
           className