feat(nav): slim hover-expand sidebar, role tooltip, logout button

The rail now sits slim by default and expands to a labelled overlay on hover
or keyboard focus without pushing content; the manual toggle became a pin
(pinned = the old in-flow expanded rail). The header no longer reserves a fixed
504px left offset — it's absolutely positioned inside the content column, so it
tracks the actual left zone and reclaims the dead gap. The role badge is gone;
role now shows via a title tooltip on the username, and a logout quick-button
joins the language/about cluster.

frontend/src/App.tsx

@@ -369,8 +369,9 @@ export default function App() {
   // Collapse state for the two full-height panels (left nav + filter sidebar). Persisted to the
   // user's preferences so it follows the account across devices; a localStorage cache seeds the
   // initial render synchronously so nothing flashes open before the server prefs arrive.
+  // Default unpinned (slim + hover-expand overlay); accounts that explicitly pin keep their choice.
   const [navCollapsed, setNavCollapsedState] = useState<boolean>(() =>
-    Boolean(readAccount(LS.navCollapsed, false))
+    Boolean(readAccount(LS.navCollapsed, true))
   );
   const [filterCollapsed, setFilterCollapsedState] = useState<boolean>(() =>
     Boolean(readAccount(LS.filterCollapsed, false))

frontend/src/components/Header.tsx

@@ -103,9 +103,10 @@ export default function Header({
   }
 
   return (
-    // Fixed left = the left zone at its widest: nav card (12 margin + 208 + 12 margin = 232) +
-    // filter sidebar (256) + 16 gap = 504. Constant, so it never shifts on collapse/module change.
-    <div className="pointer-events-none fixed top-3 left-4 right-[10%] z-30 flex items-center gap-3 md:left-[504px]">
+    // Absolutely positioned within the (relative) content column, so its left edge tracks the
+    // actual left zone: it sits just inside the content, reclaiming the space when the nav rail is
+    // slim and/or no filter sidebar is present — no hard-coded offset.
+    <div className="pointer-events-none absolute top-3 left-3 right-[10%] z-30 flex items-center gap-3">
       <ModuleName
         label={t(moduleLabelKey[page])}
         labels={moduleLabels}

frontend/src/components/NavSidebar.tsx

@@ -6,8 +6,6 @@ import {
   Activity,
   BarChart3,
   Bell,
-  ChevronLeft,
-  ChevronRight,
   Clapperboard,
   Download,
   Home,
@@ -15,6 +13,8 @@ import {
   ListVideo,
   LogOut,
   MessageSquare,
+  Pin,
+  PinOff,
   ScrollText,
   Settings,
   Shield,
@@ -62,6 +62,14 @@ export default function NavSidebar({
   onGoToFullHistory: () => void;
 }) {
   const { t } = useTranslation();
+  // Hover/focus expand: when unpinned, the rail sits slim (icons only) and expands to a labelled
+  // overlay on pointer hover or keyboard focus WITHOUT pushing content. Pinned keeps it expanded
+  // in-flow like before. `collapsed` (persisted per-account) now means "unpinned".
+  const [hovered, setHovered] = useState(false);
+  const [focused, setFocused] = useState(false);
+  const pinned = !collapsed;
+  const expanded = pinned || hovered || focused;
+  const slim = !expanded; // visual: icon-only rail
   const [acctOpen, setAcctOpen] = useState(false);
   const acctBtnRef = useRef<HTMLButtonElement | null>(null);
   const acctPanelRef = useRef<HTMLDivElement | null>(null);
@@ -213,21 +221,14 @@ export default function NavSidebar({
   const rowBase =
     "w-full flex items-center gap-3 rounded-lg px-2.5 py-2 text-sm transition";
   const name = me.display_name ?? me.email.split("@")[0];
-  // Role shown next to the name (expanded) / as an avatar dot (collapsed). Demo isn't a real
-  // role (it's a flag on a `user` row), so surface it first.
+  // Role is surfaced as a plain title tooltip on the account row (no visual badge). Demo isn't a
+  // real role (it's a flag on a `user` row), so surface it first.
   const roleKey: "admin" | "user" | "demo" = me.is_demo
     ? "demo"
     : me.role === "admin"
       ? "admin"
       : "user";
-  const roleChipCls =
-    roleKey === "admin"
-      ? "bg-accent/15 text-accent"
-      : roleKey === "demo"
-        ? "bg-amber-500/20 text-amber-500"
-        : "bg-muted/15 text-muted";
-  const roleDotCls =
-    roleKey === "admin" ? "bg-accent" : roleKey === "demo" ? "bg-amber-500" : "bg-muted";
+  const roleLabel = t(`nav.role.${roleKey}`);
 
   const renderItem = ({ page: p, icon: Icon, label, badge }: NavItem) => {
     const active = page === p;
@@ -239,9 +240,9 @@ export default function NavSidebar({
       <button
         key={p}
         onClick={() => setPage(p)}
-        title={collapsed ? label : undefined}
+        title={slim ? label : undefined}
         aria-current={active ? "page" : undefined}
-        className={`${rowBase} ${collapsed ? "justify-center px-0" : ""} relative ${
+        className={`${rowBase} ${slim ? "justify-center px-0" : ""} relative ${
           active ? "bg-accent text-accent-fg" : "text-muted hover:text-fg hover:bg-card"
         }`}
       >
@@ -249,7 +250,7 @@ export default function NavSidebar({
           <Icon className="w-[18px] h-[18px]" />
           {/* Collapsed rail: a numeric badge centred on a circle at the icon corner; the ring
               matches the row background so it reads cleanly whether the row is active or not. */}
-          {show && collapsed && (
+          {show && slim && (
             <span
               className={`absolute -top-2 -right-2 min-w-[16px] h-4 px-1 rounded-full text-[10px] font-bold leading-none grid place-items-center ring-2 ${badgeColor} ${
                 active ? "ring-accent" : "ring-bg"
@@ -259,8 +260,8 @@ export default function NavSidebar({
             </span>
           )}
         </span>
-        {!collapsed && <span className="truncate">{label}</span>}
-        {show && !collapsed && (
+        {!slim && <span className="truncate">{label}</span>}
+        {show && !slim && (
           <span
             className={`ml-auto min-w-[18px] h-[18px] px-1.5 rounded-full text-[11px] font-semibold leading-none inline-flex items-center justify-center tabular-nums ${badgeColor}`}
           >
@@ -272,14 +273,25 @@ export default function NavSidebar({
   };
 
   return (
-    <nav
-      className={`glass relative shrink-0 rounded-2xl flex flex-col py-3 m-3 transition-[width] ${
-        collapsed ? "w-[56px] px-2" : "w-52 px-3"
-      }`}
-      aria-label={t("nav.primary")}
+    // Layout slot: reserves only the slim footprint when unpinned, so the expanded rail (below)
+    // overlays content instead of pushing it. Pinned reserves the full width (in-flow).
+    <div
+      className={`relative shrink-0 transition-[width] ${pinned ? "w-[232px]" : "w-20"}`}
+      onMouseEnter={() => setHovered(true)}
+      onMouseLeave={() => setHovered(false)}
+      onFocus={() => setFocused(true)}
+      onBlur={(e) => {
+        if (!e.currentTarget.contains(e.relatedTarget as Node)) setFocused(false);
+      }}
     >
-      <div className={`flex items-center mb-3 ${collapsed ? "justify-center" : "justify-between"}`}>
-        {!collapsed && (
+      <nav
+        className={`glass absolute top-0 bottom-0 left-0 z-40 rounded-2xl flex flex-col py-3 m-3 transition-[width] ${
+          slim ? "w-[56px] px-2" : "w-52 px-3"
+        }`}
+        aria-label={t("nav.primary")}
+      >
+      <div className={`flex items-center mb-3 ${slim ? "justify-center" : "justify-between"}`}>
+        {!slim && (
           <button
             onClick={() => setPage("feed")}
             className="text-lg font-bold tracking-tight select-none cursor-pointer rounded-md -mx-1 px-1 hover:bg-card hover:opacity-90 transition"
@@ -290,15 +302,11 @@ export default function NavSidebar({
         )}
         <button
           onClick={onToggleCollapse}
-          title={collapsed ? t("nav.expand") : t("nav.collapse")}
-          aria-label={collapsed ? t("nav.expand") : t("nav.collapse")}
+          title={pinned ? t("nav.unpin") : t("nav.pin")}
+          aria-label={pinned ? t("nav.unpin") : t("nav.pin")}
           className="p-1 rounded-md text-muted hover:text-fg hover:bg-card transition"
         >
-          {collapsed ? (
-            <ChevronRight className="w-4 h-4" />
-          ) : (
-            <ChevronLeft className="w-4 h-4" />
-          )}
+          {pinned ? <PinOff className="w-4 h-4" /> : <Pin className="w-4 h-4" />}
         </button>
       </div>
 
@@ -308,7 +316,7 @@ export default function NavSidebar({
           isAdmin={me.role === "admin"}
           onGoToFullHistory={onGoToFullHistory}
           variant="rail"
-          collapsed={collapsed}
+          collapsed={slim}
         />
       </div>
 
@@ -319,7 +327,7 @@ export default function NavSidebar({
       >
         {userItems.map(renderItem)}
         {systemItems.length > 0 &&
-          (collapsed ? (
+          (slim ? (
             // Collapsed rail: a short, thicker centred rule is the clearest "new section" cue
             // when there's no room for a label.
             <div className="my-2 mx-auto w-7 border-t-2 border-border" />
@@ -337,7 +345,7 @@ export default function NavSidebar({
       <div className="mt-2 pt-2 border-t border-border flex flex-col gap-1">
         <div
           className={`flex items-center justify-center gap-2 pb-2 mb-1 border-b border-border ${
-            collapsed ? "flex-col" : "flex-row"
+            slim ? "flex-col" : "flex-row"
           }`}
         >
           <LanguageSwitcher variant="rail" value={language} onChange={onChangeLanguage} />
@@ -349,27 +357,35 @@ export default function NavSidebar({
           >
             <Info className="w-5 h-5" />
           </button>
+          <button
+            onClick={logout}
+            title={t("header.account.signOut")}
+            aria-label={t("header.account.signOut")}
+            className="p-2 rounded-lg text-muted hover:text-fg hover:bg-card transition"
+          >
+            <LogOut className="w-5 h-5" />
+          </button>
         </div>
         <button
           onClick={() => setPage("settings")}
-          title={collapsed ? t("header.account.settings") : undefined}
+          title={slim ? t("header.account.settings") : undefined}
           aria-current={page === "settings" ? "page" : undefined}
-          className={`${rowBase} ${collapsed ? "justify-center px-0" : ""} ${
+          className={`${rowBase} ${slim ? "justify-center px-0" : ""} ${
             page === "settings"
               ? "bg-accent text-accent-fg"
               : "text-muted hover:text-fg hover:bg-card"
           }`}
         >
           <Settings className="w-[18px] h-[18px] shrink-0" />
-          {!collapsed && <span className="truncate">{t("header.account.settings")}</span>}
+          {!slim && <span className="truncate">{t("header.account.settings")}</span>}
         </button>
 
         <div className="relative">
           <button
             ref={acctBtnRef}
             onClick={toggleAccount}
-            title={collapsed ? name : undefined}
-            className={`${rowBase} ${collapsed ? "justify-center px-0" : ""} text-muted hover:text-fg hover:bg-card`}
+            title={slim ? `${name} · ${roleLabel}` : undefined}
+            className={`${rowBase} ${slim ? "justify-center px-0" : ""} text-muted hover:text-fg hover:bg-card`}
           >
             <span className="relative shrink-0">
               <AvatarImg
@@ -377,19 +393,10 @@ export default function NavSidebar({
                 fallback={name}
                 className="w-[22px] h-[22px] rounded-full text-[10px]"
               />
-              {collapsed && (
-                <span
-                  className={`absolute -bottom-0.5 -right-0.5 w-2.5 h-2.5 rounded-full ring-2 ring-bg ${roleDotCls}`}
-                  title={t(`nav.role.${roleKey}`)}
-                />
-              )}
             </span>
-            {!collapsed && <span className="truncate flex-1 text-left">{name}</span>}
-            {!collapsed && (
-              <span
-                className={`shrink-0 text-[10px] font-semibold uppercase tracking-wide px-1.5 py-0.5 rounded ${roleChipCls}`}
-              >
-                {t(`nav.role.${roleKey}`)}
+            {!slim && (
+              <span title={roleLabel} className="truncate flex-1 text-left">
+                {name}
               </span>
             )}
           </button>
@@ -469,6 +476,7 @@ export default function NavSidebar({
             )}
         </div>
       </div>
-    </nav>
+      </nav>
+    </div>
   );
 }

frontend/src/i18n/locales/en/nav.json

@@ -1,7 +1,7 @@
 {
   "primary": "Primary navigation",
-  "collapse": "Collapse sidebar",
-  "expand": "Expand sidebar",
+  "pin": "Pin sidebar open",
+  "unpin": "Unpin sidebar",
   "adminSection": "Admin",
   "role": {
     "admin": "Admin",

frontend/src/i18n/locales/hu/nav.json

@@ -1,7 +1,7 @@
 {
   "primary": "Fő navigáció",
-  "collapse": "Oldalsáv összecsukása",
-  "expand": "Oldalsáv kinyitása",
+  "pin": "Oldalsáv rögzítése nyitva",
+  "unpin": "Oldalsáv rögzítésének feloldása",
   "adminSection": "Admin",
   "role": {
     "admin": "Admin",