redesign: sidebar nav — clean 2026 style

- Softer sidebar border (50% opacity)
- Cleaner nav items: subtle accent bg on active, no inset shadow
- Icons dimmed when inactive, brighten on hover
- Section headers: simple text labels, no chevron toggles
- Removed collapsible sections (all always visible)
- Cleaner brand: single-line name, shorter height
- Bottom: removed hardcoded User placeholder, just Admin + Theme
- Softer border dividers throughout

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

web/src/components/app-shell.tsx

@@ -4,9 +4,8 @@ import { useState, useEffect, Suspense, createContext, useContext } from "react"
 import { usePathname, useSearchParams } from "next/navigation";
 import Link from "next/link";
 import {
-  ChevronRightIcon,
+  CircleIcon,
   LayoutGridIcon,
-  PlusIcon,
   UserIcon,
   UsersIcon,
   InboxIcon,
@@ -55,22 +54,19 @@ function SidebarNavItem({
       href={href}
       title={collapsed ? label : undefined}
       className={cn(
-        "group flex items-center px-2 py-1.5 rounded-md text-[13px] transition-all duration-150 mb-0.5",
+        "group flex items-center px-2.5 py-1.5 rounded-md text-[13px] transition-colors",
         collapsed ? "justify-center w-full" : "justify-between",
         active
-          ? "bg-sidebar-primary text-sidebar-primary-foreground font-semibold shadow-[inset_3px_0_0_color-mix(in_oklch,var(--sidebar-primary-foreground)_55%,transparent)]"
-          : "text-sidebar-foreground/70 hover:text-sidebar-foreground hover:bg-sidebar-accent font-normal"
+          ? "bg-sidebar-accent text-sidebar-foreground font-medium"
+          : "text-sidebar-foreground/55 hover:text-sidebar-foreground hover:bg-sidebar-accent/50 font-normal"
       )}
     >
-      <span className={cn("flex items-center", collapsed ? "" : "gap-2.5")}>
-        <Icon className="w-4 h-4 flex-shrink-0" />
-        {!collapsed && label}
+      <span className={cn("flex items-center min-w-0", collapsed ? "" : "gap-2.5")}>
+        <Icon className={cn("w-4 h-4 flex-shrink-0", active ? "opacity-90" : "opacity-50 group-hover:opacity-70")} />
+        {!collapsed && <span className="truncate">{label}</span>}
       </span>
       {!collapsed && count !== undefined && count > 0 && (
-        <span className={cn(
-          "min-w-5 rounded px-1 text-right text-[11px] tabular-nums",
-          active ? "text-sidebar-primary-foreground/80" : "text-sidebar-foreground/45"
-        )}>
+        <span className="min-w-5 rounded px-1 text-right text-[11px] tabular-nums text-sidebar-foreground/35">
           {count}
         </span>
       )}
@@ -93,11 +89,6 @@ function SidebarNav() {
   const [dashboards, setDashboards] = useState<Dashboard[]>([]);
   const [currentUserId, setCurrentUserId] = useState<string | null>(null);
   const [myTeamId, setMyTeamId] = useState<string | null>(null);
-  const [expanded, setExpanded] = useState<Record<string, boolean>>({
-    dashboards: true,
-    queues: true,
-    views: true,
-  });
   const [newDashboardName, setNewDashboardName] = useState("");
   const [addingDashboard, setAddingDashboard] = useState(false);
 
@@ -220,21 +211,14 @@ function SidebarNav() {
       </div>
 
       {dashboards.length > 0 && (
-        <div className="mt-4">
+        <div className="mt-5">
           {!collapsed && (
-            <button
-              type="button"
-              onClick={() => setExpanded((e) => ({ ...e, dashboards: !e.dashboards }))}
-              className="flex w-full items-center gap-1 px-2 py-1.5 text-[11px] font-semibold text-sidebar-foreground/45 uppercase hover:text-sidebar-foreground/70"
-            >
-              <ChevronRightIcon
-                className={cn("h-3 w-3 transition-transform", expanded.dashboards && "rotate-90")}
-              />
+            <div className="px-2.5 mb-1 text-[10px] font-medium text-sidebar-foreground/30 uppercase tracking-wider">
               Dashboards
-            </button>
+            </div>
           )}
-          {expanded.dashboards && dashboards.length > 0 && (
-            <div className="px-2">
+          {dashboards.length > 0 && (
+            <div className="px-2.5">
               <select
                 value={dashboards.find((d) => pathname.startsWith("/dashboards/") && pathname.endsWith(d.id))?.id ?? ""}
                 onChange={(e) => {
@@ -290,20 +274,13 @@ function SidebarNav() {
       )}
 
       {savedViews.length > 0 && (
-        <div className="mt-4">
+        <div className="mt-5">
           {!collapsed && (
-            <button
-              type="button"
-              onClick={() => setExpanded((e) => ({ ...e, views: !e.views }))}
-              className="flex w-full items-center gap-1 px-2 py-1.5 text-[11px] font-semibold text-sidebar-foreground/45 uppercase hover:text-sidebar-foreground/70"
-            >
-              <ChevronRightIcon
-                className={cn("h-3 w-3 transition-transform", expanded.views && "rotate-90")}
-              />
+            <div className="px-2.5 mb-1 text-[10px] font-medium text-sidebar-foreground/30 uppercase tracking-wider">
               Saved views
-            </button>
+            </div>
           )}
-          {expanded.views && savedViews.map((view) => {
+          {savedViews.map((view) => {
             const active =
               pathname === "/" && searchParams.get("view_id") === view.id;
             return (
@@ -320,30 +297,20 @@ function SidebarNav() {
       )}
 
       {queues.length > 0 && (
-        <div className="mt-4">
+        <div className="mt-5">
           {!collapsed && (
-            <button
-              type="button"
-              onClick={() => setExpanded((e) => ({ ...e, queues: !e.queues }))}
-              className="flex w-full items-center gap-1 px-2 py-1.5 text-[11px] font-semibold text-sidebar-foreground/45 uppercase hover:text-sidebar-foreground/70"
-            >
-              <ChevronRightIcon
-                className={cn("h-3 w-3 transition-transform", expanded.queues && "rotate-90")}
-              />
+            <div className="px-2.5 mb-1 text-[10px] font-medium text-sidebar-foreground/30 uppercase tracking-wider">
               Queues
-            </button>
+            </div>
           )}
-          {expanded.queues && queues.map((queue) => {
+          {queues.map((queue) => {
             const active =
               pathname === "/" && searchParams.get("queue") === queue.id;
-            const QueueIcon = () => (
-              <span className="w-2 h-2 rounded-full bg-sidebar-primary flex-shrink-0 shadow-[0_0_0_3px_color-mix(in_oklch,var(--sidebar-primary)_18%,transparent)]" />
-            );
             return (
               <SidebarNavItem
                 key={queue.id}
                 href={`/?queue=${queue.id}`}
-                icon={QueueIcon}
+                icon={CircleIcon}
                 label={queue.name}
                 count={queue.count}
                 active={active}
@@ -361,32 +328,14 @@ function SidebarBottom() {
   const collapsed = useSidebarCollapsed();
 
   return (
-    <div className="border-t border-sidebar-border p-2">
+    <div className="border-t border-sidebar-border/50 p-2">
       <SidebarNavItem
         href="/admin"
         icon={SettingsIcon}
         label="Admin"
         active={pathname === "/admin"}
       />
-      <div
-        className={cn(
-          "flex items-center mt-0.5 px-2 py-1.5",
-          collapsed ? "justify-center" : "gap-2"
-        )}
-        title={collapsed ? "User" : undefined}
-      >
-        <div className="w-5 h-5 rounded-md bg-sidebar-primary flex items-center justify-center flex-shrink-0">
-          <span className="text-sidebar-primary-foreground text-[10px] font-semibold">
-            U
-          </span>
-        </div>
-        {!collapsed && (
-          <span className="text-[13px] text-sidebar-foreground/65 truncate">
-            User
-          </span>
-        )}
-      </div>
-      <div className={cn("flex", collapsed ? "justify-center mt-1" : "mt-1")}>
+      <div className={cn("flex", collapsed ? "justify-center mt-2" : "mt-2 px-1")}>
         <ThemeToggle />
       </div>
     </div>
@@ -421,43 +370,33 @@ export function AppShell({ children }: { children: React.ReactNode }) {
         {/* Sidebar */}
         <aside
           className={cn(
-            "flex-shrink-0 flex flex-col bg-sidebar border-r border-sidebar-border transition-all duration-150 shadow-[16px_0_42px_color-mix(in_oklch,var(--sidebar)_18%,transparent)]",
-            sidebarCollapsed ? "w-[60px]" : "w-60"
+            "flex-shrink-0 flex flex-col bg-sidebar border-r border-sidebar-border/50 transition-all duration-200",
+            sidebarCollapsed ? "w-[56px]" : "w-[232px]"
           )}
         >
           {/* Brand */}
-          <div className="h-14 flex items-center justify-between gap-2 px-3 border-b border-sidebar-border">
-            <Link href="/" className="flex items-center gap-2">
-              <div className="w-7 h-7 rounded-md bg-sidebar-primary flex items-center justify-center shadow-[0_0_0_1px_color-mix(in_oklch,var(--sidebar-primary)_55%,white_20%)]">
-                <span className="text-sidebar-primary-foreground text-[12px] font-bold">
-                  T
-                </span>
+          <div className="h-12 flex items-center justify-between gap-2 px-3 border-b border-sidebar-border/50">
+            <Link href="/" className="flex items-center gap-2.5">
+              <div className="w-6 h-6 rounded-md bg-sidebar-primary flex items-center justify-center">
+                <span className="text-sidebar-primary-foreground text-[11px] font-bold">T</span>
               </div>
               {!sidebarCollapsed && (
-                <span className="leading-tight">
-                  <span className="block font-semibold text-sidebar-foreground text-sm">
-                    Tessera
-                  </span>
-                  <span className="block text-[10px] text-sidebar-foreground/45">
-                    ScripFoundry
-                  </span>
-                </span>
+                <span className="text-sm font-semibold text-sidebar-foreground tracking-tight">Tessera</span>
               )}
             </Link>
             {!sidebarCollapsed && (
               <button
                 onClick={() => setCommandOpen(true)}
-                className="flex h-7 items-center gap-1 rounded-md border border-sidebar-border px-2 text-[11px] text-sidebar-foreground/55 transition-colors hover:bg-sidebar-accent hover:text-sidebar-foreground"
+                className="flex h-6 items-center gap-1 rounded border border-sidebar-border/50 px-1.5 text-[10px] text-sidebar-foreground/40 transition-colors hover:bg-sidebar-accent hover:text-sidebar-foreground/60"
                 aria-label="Open command palette"
               >
-                <CommandIcon className="h-3.5 w-3.5" />
-                K
+                <CommandIcon className="h-3 w-3" />K
               </button>
             )}
           </div>
 
           {/* Nav */}
-          <nav className="flex-1 overflow-y-auto py-3 px-2">
+          <nav className="flex-1 overflow-y-auto py-2.5 px-2">
             <Suspense
               fallback={
                 <div className="space-y-1.5 px-2">